ALIEN 3 A film review by Frank Maloney Copyright 1992 Frank Maloney
ALIEN 3 is a film directed by David Fincher, from a script by David Giler, Walter Hill, and Larry Ferguson. It stars Sigourney Weaver, Charles S. Dutton, Paul McGann, and Lance Henriksen. Rated R, for violence, language.
ALIEN 3 is, of course, the latest sequel to 1979's ALIEN, a landmark movie in its genre that scared the living daylights out of us all and has had us coming back for more for 13 years. ALIEN was poetic, scary, and innovative. ALIENS (1986) was the roller-coaster ride through hell. ALIEN 3 is grim, monochromatic, neither as scary nor as fast-paced as its predecessors. And yet, it's a lot better than I had been led to expect.
Someone tell us the story of how David Fincher, an MTV veteran, got the assignment to do this very expensive, potentially very lucrative film. It turns out to be an interesting choice since the editing style and the photography appear to me to be highly influenced by the music video style. Some film student should have a lot of fun writing this one up. I don't have the name of photographer here, but I must say I intensely enjoyed the photography in this film, there being times when it takes on a life of its own, quite apart from the action. I'm thinking a shot of sprinklers that look like ballerinas in ankle-length tutus, from which point on I became almost distractingly aware of the photography.
The story has a couple of interesting twists to it that ought to appeal to veterans of the series. And the supporting players are an interesting bunch. With everybody's head shaved, one concentrates on the faces more, and they an interesting lot of faces, not very pretty for the most part, but very interesting. Sigourney Weaver is pretty much the whole show, but a couple of the others come perilously close to upstaging here once or twice.
John Hartl in the Seattle Times made the interesting observation that the film is a metaphor about disease. After comparing it to NO EXIT or last year's POISON as a Hollywood version of trapped people with no defenses, he mentions that if the first film was about cancer, this one is about AIDS. There is a "vow of celibacy that also includes women." There are complaints about the lack of condoms and characters says things like: "I'm sorry you've got this thing inside you" and "I don't have much time, I'm dead already." This is a metaphor, remember, but one with a lot of resonance for me.
If you're a fan of the series, you will see ALIEN 3 regardless of what I say, so it hardly matters that I think you ought to, even at full price. If you're not one of the converted, you might want to give it a go at matinee rates. It has its points.
-- Frank Richard Aloysius Jude Maloney .
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git filter-branch --tree-filter 'rm filename' HEAD
git-filter-branch(1) Manual Page
NAME
git-filter-branch - Rewrite branches
SYNOPSIS
git filter-branch [--env-filter <command>] [--tree-filter <command>] [--index-filter <command>] [--parent-filter <command>] [--msg-filter <command>] [--commit-filter <command>] [--tag-name-filter <command>] [--subdirectory-filter <directory>] [--prune-empty] [--original <namespace>] [-d <directory>] [-f | --force] [--] [<rev-list options>...]
DESCRIPTION
Lets you rewrite Git revision history by rewriting the branches mentioned in the <rev-list options>, applying custom filters on each revision. Those filters can modify each tree (e.g. removing a file or running a perl rewrite on all files) or information about each commit. Otherwise, all information (including original commit times or merge information) will be preserved.
The command will only rewrite the positive refs mentioned in the command line (e.g. if you pass a..b, only b will be rewritten). If you specify no filters, the commits will be recommitted without any changes, which would normally have no effect. Nevertheless, this may be useful in the future for compensating for some Git bugs or such, therefore such a usage is permitted.
NOTE: This command honors .git/info/grafts file and refs in the refs/replace/ namespace. If you have any grafts or replacement refs defined, running this command will make them permanent.
WARNING! The rewritten history will have different object names for all the objects and will not converge with the original branch. You will not be able to easily push and distribute the rewritten branch on top of the original branch. Please do not use this command if you do not know the full implications, and avoid using it anyway, if a simple single commit would suffice to fix your problem. (See the "RECOVERING FROM UPSTREAM REBASE" section in git-rebase(1) for further information about rewriting published history.)
Always verify that the rewritten version is correct: The original refs, if different from the rewritten ones, will be stored in the namespace refs/original/.
Note that since this operation is very I/O expensive, it might be a good idea to redirect the temporary directory off-disk with the -d option, e.g. on tmpfs. Reportedly the speedup is very noticeable.
Filters
The filters are applied in the order as listed below. The <command> argument is always evaluated in the shell context using the eval command (with the notable exception of the commit filter, for technical reasons). Prior to that, the $GIT_COMMIT environment variable will be set to contain the id of the commit being rewritten. Also, GIT_AUTHOR_NAME, GIT_AUTHOR_EMAIL, GIT_AUTHOR_DATE, GIT_COMMITTER_NAME, GIT_COMMITTER_EMAIL, and GIT_COMMITTER_DATE are taken from the current commit and exported to the environment, in order to affect the author and committer identities of the replacement commit created by git-commit-tree(1) after the filters have run.
If any evaluation of <command> returns a non-zero exit status, the whole operation will be aborted.
A map function is available that takes an "original sha1 id" argument and outputs a "rewritten sha1 id" if the commit has been already rewritten, and "original sha1 id" otherwise; the map function can return several ids on separate lines if your commit filter emitted multiple commits.
OPTIONS
- --env-filter <command>
This filter may be used if you only need to modify the environment in which the commit will be performed. Specifically, you might want to rewrite the author/committer name/email/time environment variables (see git-commit-tree(1) for details). Do not forget to re-export the variables.
- --tree-filter <command>
This is the filter for rewriting the tree and its contents. The argument is evaluated in shell with the working directory set to the root of the checked out tree. The new tree is then used as-is (new files are auto-added, disappeared files are auto-removed - neither .gitignore files nor any other ignore rules HAVE ANY EFFECT!).
- --index-filter <command>
This is the filter for rewriting the index. It is similar to the tree filter but does not check out the tree, which makes it much faster. Frequently used with git rm --cached --ignore-unmatch ..., see EXAMPLES below. For hairy cases, see git-update-index(1).
- --parent-filter <command>
This is the filter for rewriting the commit's parent list. It will receive the parent string on stdin and shall output the new parent string on stdout. The parent string is in the format described in git-commit-tree(1): empty for the initial commit, "-p parent" for a normal commit and "-p parent1 -p parent2 -p parent3 ..." for a merge commit.
- --msg-filter <command>
This is the filter for rewriting the commit messages. The argument is evaluated in the shell with the original commit message on standard input; its standard output is used as the new commit message.
- --commit-filter <command>
This is the filter for performing the commit. If this filter is specified, it will be called instead of the git commit-tree command, with arguments of the form "<TREE_ID> [(-p <PARENT_COMMIT_ID>)...]" and the log message on stdin. The commit id is expected on stdout.
As a special extension, the commit filter may emit multiple commit ids; in that case, the rewritten children of the original commit will have all of them as parents.
You can use the map convenience function in this filter, and other convenience functions, too. For example, calling skip_commit "$@" will leave out the current commit (but not its changes! If you want that, use git rebase instead).
You can also use the git_commit_non_empty_tree "$@" instead of git commit-tree "$@" if you don't wish to keep commits with a single parent and that makes no change to the tree.
- --tag-name-filter <command>
This is the filter for rewriting tag names. When passed, it will be called for every tag ref that points to a rewritten object (or to a tag object which points to a rewritten object). The original tag name is passed via standard input, and the new tag name is expected on standard output.
The original tags are not deleted, but can be overwritten; use "--tag-name-filter cat" to simply update the tags. In this case, be very careful and make sure you have the old tags backed up in case the conversion has run afoul.
Nearly proper rewriting of tag objects is supported. If the tag has a message attached, a new tag object will be created with the same message, author, and timestamp. If the tag has a signature attached, the signature will be stripped. It is by definition impossible to preserve signatures. The reason this is "nearly" proper, is because ideally if the tag did not change (points to the same object, has the same name, etc.) it should retain any signature. That is not the case, signatures will always be removed, buyer beware. There is also no support for changing the author or timestamp (or the tag message for that matter). Tags which point to other tags will be rewritten to point to the underlying commit.
- --subdirectory-filter <directory>
Only look at the history which touches the given subdirectory. The result will contain that directory (and only that) as its project root. Implies [Remap_to_ancestor].
- --prune-empty
Some kind of filters will generate empty commits, that left the tree untouched. This switch allow git-filter-branch to ignore such commits. Though, this switch only applies for commits that have one and only one parent, it will hence keep merges points. Also, this option is not compatible with the use of --commit-filter. Though you just need to use the function git_commit_non_empty_tree "$@" instead of the git commit-tree "$@" idiom in your commit filter to make that happen.
- --original <namespace>
Use this option to set the namespace where the original commits will be stored. The default value is refs/original.
- -d <directory>
Use this option to set the path to the temporary directory used for rewriting. When applying a tree filter, the command needs to temporarily check out the tree to some directory, which may consume considerable space in case of large projects. By default it does this in the .git-rewrite/ directory but you can override that choice by this parameter.
- -f
- --force
git filter-branch refuses to start with an existing temporary directory or when there are already refs starting with refs/original/, unless forced.
- <rev-list options>...
Arguments for git rev-list. All positive refs included by these options are rewritten. You may also specify options such as --all, but you must use -- to separate them from the git filter-branch options. Implies [Remap_to_ancestor].
Remap to ancestor
By using rev-list(1) arguments, e.g., path limiters, you can limit the set of revisions which get rewritten. However, positive refs on the command line are distinguished: we don't let them be excluded by such limiters. For this purpose, they are instead rewritten to point at the nearest ancestor that was not excluded.
Examples
Suppose you want to remove a file (containing confidential information or copyright violation) from all commits:
However, if the file is absent from the tree of some commit, a simple rm filename will fail for that tree and commit. Thus you may instead want to use rm -f filename as the script.
Using --index-filter with git rm yields a significantly faster version. Like with using rm filename, git rm --cached filename will fail if the file is absent from the tree of a commit. If you want to "completely forget" a file, it does not matter when it entered history, so we also add --ignore-unmatch:
git filter-branch --index-filter 'git rm --cached --ignore-unmatch filename' HEAD
Now, you will get the rewritten history saved in HEAD.
To rewrite the repository to look as if foodir/ had been its project root, and discard all other history:
git filter-branch --subdirectory-filter foodir -- --all
Thus you can, e.g., turn a library subdirectory into a repository of its own. Note the -- that separates filter-branch options from revision options, and the --all to rewrite all branches and tags.
To set a commit (which typically is at the tip of another history) to be the parent of the current initial commit, in order to paste the other history behind the current history:
git filter-branch --parent-filter 'sed "s/^\$/-p <graft-id>/"' HEAD
(if the parent string is empty - which happens when we are dealing with the initial commit - add graftcommit as a parent). Note that this assumes history with a single root (that is, no merge without common ancestors happened). If this is not the case, use:
git filter-branch --parent-filter \ 'test $GIT_COMMIT = <commit-id> && echo "-p <graft-id>" || cat' HEAD
or even simpler:
echo "$commit-id $graft-id" >> .git/info/grafts git filter-branch $graft-id..HEAD
To remove commits authored by "Darl McBribe" from the history:
git filter-branch --commit-filter ' if [ "$GIT_AUTHOR_NAME" = "Darl McBribe" ]; then skip_commit "$@"; else git commit-tree "$@"; fi' HEAD
The function skip_commit is defined as follows:
skip_commit() { shift; while [ -n "$1" ]; do shift; map "$1"; shift; done; }
The shift magic first throws away the tree id and then the -p parameters. Note that this handles merges properly! In case Darl committed a merge between P1 and P2, it will be propagated properly and all children of the merge will become merge commits with P1,P2 as their parents instead of the merge commit.
NOTE the changes introduced by the commits, and which are not reverted by subsequent commits, will still be in the rewritten branch. If you want to throw out changes together with the commits, you should use the interactive mode of git rebase.
You can rewrite the commit log messages using --msg-filter. For example, git svn-id strings in a repository created by git svn can be removed this way:
git filter-branch --msg-filter ' sed -e "/^git-svn-id:/d" '
If you need to add Acked-by lines to, say, the last 10 commits (none of which is a merge), use this command:
git filter-branch --msg-filter ' cat && echo "Acked-by: Bugs Bunny<EMAIL_ADDRESS>' HEAD~10..HEAD
The --env-filter option can be used to modify committer and/or author identity. For example, if you found out that your commits have the wrong identity due to a misconfigured user.email, you can make a correction, before publishing the project, like this:
git filter-branch --env-filter ' if test "$GIT_AUTHOR_EMAIL" = "root@localhost" then<EMAIL_ADDRESS>export GIT_AUTHOR_EMAIL fi if test "$GIT_COMMITTER_EMAIL" = "root@localhost" then<EMAIL_ADDRESS>export GIT_COMMITTER_EMAIL fi ' -- --all
To restrict rewriting to only part of the history, specify a revision range in addition to the new branch name. The new branch name will point to the top-most revision that a git rev-list of this range will print.
Consider this history:
D--E--F--G--H / / A--B-----C
To rewrite only commits D,E,F,G,H, but leave A, B and C alone, use:
git filter-branch ... C..H
To rewrite commits E,F,G,H, use one of these:
git filter-branch ... C..H --not D git filter-branch ... D..H --not C
To move the whole tree into a subdirectory, or remove it from there:
git filter-branch --index-filter \ 'git ls-files -s | sed "s-\t\"*-&newsubdir/-" | GIT_INDEX_FILE=$GIT_INDEX_FILE.new \ git update-index --index-info && mv "$GIT_INDEX_FILE.new" "$GIT_INDEX_FILE"' HEAD
Checklist for Shrinking a Repository
git-filter-branch is often used to get rid of a subset of files, usually with some combination of --index-filter and --subdirectory-filter. People expect the resulting repository to be smaller than the original, but you need a few more steps to actually make it smaller, because Git tries hard not to lose your objects until you tell it to. First make sure that:
You really removed all variants of a filename, if a blob was moved over its lifetime. git log --name-only --follow --all -- filename can help you find renames.
You really filtered all refs: use --tag-name-filter cat -- --all when calling git-filter-branch.
Then there are two ways to get a smaller repository. A safer way is to clone, that keeps your original intact.
Clone it with git clone file:///path/to/repo. The clone will not have the removed objects. See git-clone(1). (Note that cloning with a plain path just hardlinks everything!)
If you really don't want to clone it, for whatever reasons, check the following points instead (in this order). This is a very destructive approach, so make a backup or go back to cloning it. You have been warned.
Remove the original refs backed up by git-filter-branch: say git for-each-ref --format="%(refname)" refs/original/ | xargs -n 1 git update-ref -d.
Expire all reflogs with git reflog expire --expire=now --all.
Garbage collect all unreferenced objects with git gc --prune=now (or if your git-gc is not new enough to support arguments to --prune, use git repack -ad; git prune instead).
GIT
Part of the git(1) suite


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Next: Input Translation, Up: Virtual Terminal
The following is a list of control sequences recognized by
screen
. ‘(V)’ and ‘(A)’ indicate VT100-specific and
ANSI- or ISO-specific functions, respectively.
ESC E Next Line ESC D Index ESC M Reverse Index ESC H Horizontal Tab Set ESC Z Send VT100 Identification String ESC 7 (V) Save Cursor and Attributes ESC 8 (V) Restore Cursor and Attributes ESC [s (A) Save Cursor and Attributes ESC [u (A) Restore Cursor and Attributes ESC c Reset to Initial State ESC g Visual Bell ESC Pn p Cursor Visibility (97801) Pn = 6 Invisible 7 Visible ESC = (V) Application Keypad Mode ESC > (V) Numeric Keypad Mode ESC # 8 (V) Fill Screen with E's ESC \ (A) String Terminator ESC ^ (A) Privacy Message String (Message Line) ESC ! Global Message String (Message Line) ESC k Title Definition String ESC P (A) Device Control String Outputs a string directly to the host terminal without interpretation. ESC _ (A) Application Program Command (Hardstatus) ESC ] 0 ; string ^G (A) Operating System Command (Hardstatus, xterm title hack) ESC ] 83 ; cmd ^G (A) Execute screen command. This only works if multi-user support is compiled into screen. The pseudo-user ":window:" is used to check the access control list. Use "addacl :window: -rwx #?" to create a user with no rights and allow only the needed commands. Control-N (A) Lock Shift G1 (SO) Control-O (A) Lock Shift G0 (SI) ESC n (A) Lock Shift G2 ESC o (A) Lock Shift G3 ESC N (A) Single Shift G2 ESC O (A) Single Shift G3 ESC ( Pcs (A) Designate character set as G0 ESC ) Pcs (A) Designate character set as G1 ESC * Pcs (A) Designate character set as G2 ESC + Pcs (A) Designate character set as G3 ESC [ Pn ; Pn H Direct Cursor Addressing ESC [ Pn ; Pn f same as above ESC [ Pn J Erase in Display Pn = None or 0 From Cursor to End of Screen 1 From Beginning of Screen to Cursor 2 Entire Screen ESC [ Pn K Erase in Line Pn = None or 0 From Cursor to End of Line 1 From Beginning of Line to Cursor 2 Entire Line ESC [ Pn X Erase character ESC [ Pn A Cursor Up ESC [ Pn B Cursor Down ESC [ Pn C Cursor Right ESC [ Pn D Cursor Left ESC [ Pn E Cursor next line ESC [ Pn F Cursor previous line ESC [ Pn G Cursor horizontal position ESC [ Pn ` same as above ESC [ Pn d Cursor vertical position ESC [ Ps ;...; Ps m Select Graphic Rendition Ps = None or 0 Default Rendition 1 Bold 2 (A) Faint 3 (A) Standout Mode (ANSI: Italicized) 4 Underlined 5 Blinking 7 Negative Image 22 (A) Normal Intensity 23 (A) Standout Mode off (ANSI: Italicized off) 24 (A) Not Underlined 25 (A) Not Blinking 27 (A) Positive Image 30 (A) Foreground Black 31 (A) Foreground Red 32 (A) Foreground Green 33 (A) Foreground Yellow 34 (A) Foreground Blue 35 (A) Foreground Magenta 36 (A) Foreground Cyan 37 (A) Foreground White 39 (A) Foreground Default 40 (A) Background Black ... ... 49 (A) Background Default ESC [ Pn g Tab Clear Pn = None or 0 Clear Tab at Current Position 3 Clear All Tabs ESC [ Pn ; Pn r (V) Set Scrolling Region ESC [ Pn I (A) Horizontal Tab ESC [ Pn Z (A) Backward Tab ESC [ Pn L (A) Insert Line ESC [ Pn M (A) Delete Line ESC [ Pn @ (A) Insert Character ESC [ Pn P (A) Delete Character ESC [ Pn S Scroll Scrolling Region Up ESC [ Pn T Scroll Scrolling Region Down ESC [ Pn ^ same as above ESC [ Ps ;...; Ps h Set Mode ESC [ Ps ;...; Ps l Reset Mode Ps = 4 (A) Insert Mode 20 (A) ‘Automatic Linefeed’ Mode. 34 Normal Cursor Visibility ?1 (V) Application Cursor Keys ?3 (V) Change Terminal Width to 132 columns ?5 (V) Reverse Video ?6 (V) ‘Origin’ Mode ?7 (V) ‘Wrap’ Mode ?9 X10 mouse tracking ?25 (V) Visible Cursor ?47 Alternate Screen (old xterm code) ?1000 (V) VT200 mouse tracking ?1047 Alternate Screen (new xterm code) ?1049 Alternate Screen (new xterm code) ESC [ 5 i (A) Start relay to printer (ANSI Media Copy) ESC [ 4 i (A) Stop relay to printer (ANSI Media Copy) ESC [ 8 ; Ph ; Pw t Resize the window to ‘Ph’ lines and ‘Pw’ columns (SunView special) ESC [ c Send VT100 Identification String ESC [ x (V) Send Terminal Parameter Report ESC [ > c Send Secondary Device Attributes String ESC [ 6 n Send Cursor Position Report


(#) Calls to `async` or `launch` should happen inside a LaunchedEffect and not composition !!! ERROR: Calls to `async` or `launch` should happen inside a LaunchedEffect and not composition This is an error. Id : `CoroutineCreationDuringComposition` Summary : Calls to `async` or `launch` should happen inside a LaunchedEffect and not composition Severity : Error Category : Correctness Platform : Any Vendor : Jetpack Compose Identifier : androidx.compose.runtime Feedback : https://issuetracker.google.com/issues/new?component=612128 Min : Lint 7.0 Compiled : Lint 8.0 and 8.1 Artifact : [androidx.compose.runtime:runtime](androidx_compose_runtime_runtime.md.html) Affects : Kotlin and Java files and test sources Editing : This check runs on the fly in the IDE editor Implementation : [Source Code](https://cs.android.com/androidx/platform/frameworks/support/+/androidx-main:/compose/runtime/runtime-lint/src/main/java/androidx/compose/runtime/lint/ComposableCoroutineCreationDetector.kt) Tests : [Source Code](https://cs.android.com/androidx/platform/frameworks/support/+/androidx-main:/compose/runtime/runtime-lint/src/test/java/androidx/compose/runtime/lint/ComposableCoroutineCreationDetectorTest.kt) Copyright Year : 2021 Creating a coroutine with `async` or `launch` during composition is often incorrect - this means that a coroutine will be created even if the composition fails / is rolled back, and it also means that multiple coroutines could end up mutating the same state, causing inconsistent results. Instead, use `LaunchedEffect` and create coroutines inside the suspending block. The block will only run after a successful composition, and will cancel existing coroutines when `key` changes, allowing correct cleanup. (##) Example Here is an example of lint warnings produced by this check: ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~text src/androidx/compose/runtime/foo/test.kt:10:Error: Calls to async should happen inside a LaunchedEffect and not composition [CoroutineCreationDuringComposition] CoroutineScope.async {} ----- src/androidx/compose/runtime/foo/test.kt:11:Error: Calls to launch should happen inside a LaunchedEffect and not composition [CoroutineCreationDuringComposition] CoroutineScope.launch {} ------ src/androidx/compose/runtime/foo/test.kt:12:Error: Calls to launchIn should happen inside a LaunchedEffect and not composition [CoroutineCreationDuringComposition] flowOf(Unit).launchIn(CoroutineScope) -------- src/androidx/compose/runtime/foo/test.kt:16:Error: Calls to async should happen inside a LaunchedEffect and not composition [CoroutineCreationDuringComposition] CoroutineScope.async {} ----- src/androidx/compose/runtime/foo/test.kt:17:Error: Calls to launch should happen inside a LaunchedEffect and not composition [CoroutineCreationDuringComposition] CoroutineScope.launch {} ------ src/androidx/compose/runtime/foo/test.kt:18:Error: Calls to launchIn should happen inside a LaunchedEffect and not composition [CoroutineCreationDuringComposition] flowOf(Unit).launchIn(CoroutineScope) -------- src/androidx/compose/runtime/foo/test.kt:22:Error: Calls to async should happen inside a LaunchedEffect and not composition [CoroutineCreationDuringComposition] CoroutineScope.async {} ----- src/androidx/compose/runtime/foo/test.kt:23:Error: Calls to launch should happen inside a LaunchedEffect and not composition [CoroutineCreationDuringComposition] CoroutineScope.launch {} ------ src/androidx/compose/runtime/foo/test.kt:24:Error: Calls to launchIn should happen inside a LaunchedEffect and not composition [CoroutineCreationDuringComposition] flowOf(Unit).launchIn(CoroutineScope) -------- src/androidx/compose/runtime/foo/test.kt:33:Error: Calls to async should happen inside a LaunchedEffect and not composition [CoroutineCreationDuringComposition] CoroutineScope.async {} ----- src/androidx/compose/runtime/foo/test.kt:34:Error: Calls to launch should happen inside a LaunchedEffect and not composition [CoroutineCreationDuringComposition] CoroutineScope.launch {} ------ src/androidx/compose/runtime/foo/test.kt:35:Error: Calls to launchIn should happen inside a LaunchedEffect and not composition [CoroutineCreationDuringComposition] flowOf(Unit).launchIn(CoroutineScope) -------- src/androidx/compose/runtime/foo/test.kt:38:Error: Calls to async should happen inside a LaunchedEffect and not composition [CoroutineCreationDuringComposition] CoroutineScope.async {} ----- src/androidx/compose/runtime/foo/test.kt:39:Error: Calls to launch should happen inside a LaunchedEffect and not composition [CoroutineCreationDuringComposition] CoroutineScope.launch {} ------ src/androidx/compose/runtime/foo/test.kt:40:Error: Calls to launchIn should happen inside a LaunchedEffect and not composition [CoroutineCreationDuringComposition] flowOf(Unit).launchIn(CoroutineScope) -------- src/androidx/compose/runtime/foo/test.kt:46:Error: Calls to async should happen inside a LaunchedEffect and not composition [CoroutineCreationDuringComposition] CoroutineScope.async {} ----- src/androidx/compose/runtime/foo/test.kt:47:Error: Calls to launch should happen inside a LaunchedEffect and not composition [CoroutineCreationDuringComposition] CoroutineScope.launch {} ------ src/androidx/compose/runtime/foo/test.kt:48:Error: Calls to launchIn should happen inside a LaunchedEffect and not composition [CoroutineCreationDuringComposition] flowOf(Unit).launchIn(CoroutineScope) -------- src/androidx/compose/runtime/foo/test.kt:52:Error: Calls to async should happen inside a LaunchedEffect and not composition [CoroutineCreationDuringComposition] CoroutineScope.async {} ----- src/androidx/compose/runtime/foo/test.kt:53:Error: Calls to launch should happen inside a LaunchedEffect and not composition [CoroutineCreationDuringComposition] CoroutineScope.launch {} ------ src/androidx/compose/runtime/foo/test.kt:54:Error: Calls to launchIn should happen inside a LaunchedEffect and not composition [CoroutineCreationDuringComposition] flowOf(Unit).launchIn(CoroutineScope) -------- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Here is the source file referenced above: `src/androidx/compose/runtime/foo/test.kt`: ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~kotlin linenumbers package androidx.compose.runtime.foo import androidx.compose.runtime.Composable import kotlinx.coroutines.* import kotlinx.coroutines.flow.* @Composable fun Test() { CoroutineScope.async {} CoroutineScope.launch {} flowOf(Unit).launchIn(CoroutineScope) } val lambda = @Composable { CoroutineScope.async {} CoroutineScope.launch {} flowOf(Unit).launchIn(CoroutineScope) } val lambda2: @Composable () -> Unit = { CoroutineScope.async {} CoroutineScope.launch {} flowOf(Unit).launchIn(CoroutineScope) } @Composable fun LambdaParameter(content: @Composable () -> Unit) {} @Composable fun Test2() { LambdaParameter(content = { CoroutineScope.async {} CoroutineScope.launch {} flowOf(Unit).launchIn(CoroutineScope) }) LambdaParameter { CoroutineScope.async {} CoroutineScope.launch {} flowOf(Unit).launchIn(CoroutineScope) } } fun test3() { val localLambda1 = @Composable { CoroutineScope.async {} CoroutineScope.launch {} flowOf(Unit).launchIn(CoroutineScope) } val localLambda2: @Composable () -> Unit = { CoroutineScope.async {} CoroutineScope.launch {} flowOf(Unit).launchIn(CoroutineScope) } } ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ You can also visit the [source code](https://cs.android.com/androidx/platform/frameworks/support/+/androidx-main:/compose/runtime/runtime-lint/src/test/java/androidx/compose/runtime/lint/ComposableCoroutineCreationDetectorTest.kt) for the unit tests for this check to see additional scenarios. The above example was automatically extracted from the first unit test found for this lint check, `ComposableCoroutineCreationDetector.errors`. To report a problem with this extracted sample, visit https://issuetracker.google.com/issues/new?component=612128. (##) Including !!! This is not a built-in check. To include it, add the below dependency to your project. ``` // build.gradle.kts implementation("androidx.compose.runtime:runtime:1.5.0-beta02") // build.gradle implementation 'androidx.compose.runtime:runtime:1.5.0-beta02' // build.gradle.kts with version catalogs: implementation(libs.runtime) # libs.versions.toml [versions] runtime = "1.5.0-beta02" [libraries] runtime = { module = "androidx.compose.runtime:runtime", version.ref = "runtime" } ``` 1.5.0-beta02 is the version this documentation was generated from; there may be newer versions available. [Additional details about androidx.compose.runtime:runtime](androidx_compose_runtime_runtime.md.html). (##) Suppressing You can suppress false positives using one of the following mechanisms: * Using a suppression annotation like this on the enclosing element: ```kt // Kotlin @Suppress("CoroutineCreationDuringComposition") fun method() { async(...) } ``` or ```java // Java @SuppressWarnings("CoroutineCreationDuringComposition") void method() { async(...); } ``` * Using a suppression comment like this on the line above: ```kt //noinspection CoroutineCreationDuringComposition problematicStatement() ``` * Using a special `lint.xml` file in the source tree which turns off the check in that folder and any sub folder. A simple file might look like this: ```xml <?xml version="1.0" encoding="UTF-8"?> <lint> <issue id="CoroutineCreationDuringComposition" severity="ignore" /> </lint> ``` Instead of `ignore` you can also change the severity here, for example from `error` to `warning`. You can find additional documentation on how to filter issues by path, regular expression and so on [here](https://googlesamples.github.io/android-custom-lint-rules/usage/lintxml.md.html). * In Gradle projects, using the DSL syntax to configure lint. For example, you can use something like ```gradle lintOptions { disable 'CoroutineCreationDuringComposition' } ``` In Android projects this should be nested inside an `android { }` block. * For manual invocations of `lint`, using the `--ignore` flag: ``` $ lint --ignore CoroutineCreationDuringComposition ...` ``` * Last, but not least, using baselines, as discussed [here](https://googlesamples.github.io/android-custom-lint-rules/usage/baselines.md.html).


Continuous Integration
HOL - Parts Unlimited WebSite Continuous Integration with Visual Studio Team Services
Test update --- In this lab we have an application called PartsUnlimited. We want to set up Visual Studio Team Services to be able continuously integrate code into the master branch of code. This means that whenever code is committed and pushed to the master branch, we want to ensure that it integrates into our code correctly to get fast feedback. To do so, we are going to be setting up a Continuous Integration build (CI) that will allow us to compile and run unit tests on our code every time a commit is pushed to Visual Studio Team Services.
Video
Pre-requisites:
- An active Visual Studio Team Services account
Tasks Overview:
1. Import Source Code into your VSTS Account: In this step, you will connect your own Visual Studio Team Services account, download the PartsUnlimited source code, and then push it to your own Visual Studio Team Services account. There are two approaches to doing this: a) Use the Git command line, or b) Use Visual Studio.
Note: VSTS does support GitHub source code integration for use with VSTS builds, but is outside of the scope of this HOL
2. Create Continuous Integration Build: In this step, you will create a build definition that will be triggered every time a commit is pushed to your repository in Visual Studio Team Services.
3. Test the CI Trigger in Visual Studio Team Services: In this step, test the Continuous Integration build (CI) build we created by changing code in the Parts Unlimited project with Visual Studio Team Services.
I: Import Source Code into your VSTS Account with Git
We want to push the application code to your Visual Studio Team Services account in order to use VSTS Build.
Talking Point: For this lab we are using the VSTS Git project. The next couple of steps will allow you to add the PartUnlimited source to the Git master repository.
If you haven’t already, create a new team project in your Visual Studio Team Services account that uses Git for source control.
1. Clone the repository to a local directory.
Create a parent Working Directory on your local file system. For instance, on a Windows OS you can create the following directory:
C:\Source\Repos
Open a command line (one that supports Git) and change to the directory you created above.
Clone the repository with the following command. You can paste in the URL if you copied it in Step 1. In the example below, the clone will be copied into a directory named HOL. Feel free to use whatever directory name you like, or leave it blank to use the default directory name:
git clone https://github.com/Microsoft/PartsUnlimited.git HOL
After a few seconds of downloading, all of the code should now be on your local machine.
Move into the directory that was just created. In a Windows OS (and assuming you used HOL as the directory name), you can use this command:
cd HOL
2. Remove the link to GitHub.
The Git repo you just downloaded currently has a remote called origin that points to the GitHub repo. Since we won’t be using it any longer, we can delete the reference.
To delete the GitHub remote, use:
git remote remove origin
3. Find the URL to access the VSTS Git repo
First, we need to find the URL to empty Git repository in VSTS. If you remember your account name, and the Team Project name you created, the URL to the default Git repo is easily assembled:
https://<account>.visualstudio.com\_git\<project>
Alternatively, you can use a web browser to browse to your account, click into your project, and click the Code tab to get to your default Git repository:
https://<account>.visualstudio.com
Additionally, at the bottom of the web page, you will see the two commands that we will use to push the existing code to VSTS.
4. Add the link to VSTS and push your local Git repo
In the local directory from Step 1, use the following command to add VSTS as the Git remote named origin. You can either type the URL you found in Step 3, or simply copy the first command from the VSTS web page.
git remote add origin https://<account>.visualstudio.com\<project>\_git\<project> Now you can push the code, including history, to VSTS:
git push -u origin --all Congratulations, your code should now be in VSTS!
II. Create Continuous Integration Build
A continuous integration build will give us the ability check whether the code we checked in can compile and will successfully pass any automated tests that we have created against it.
1.  Click Browse and then select your team project and click Navigate.
3. Once on the project’s home page, click on the Build hub at the top of the page, then on All Definitions, and then on New Definition.
4. Select the Empty build definition, and then click Next.
Note: As you can see, you can now do Universal Windows Apps & Xamarin Android/IOS Builds as well as Xcode builds.
5. After clicking the Next button, select HOL Team Project, select HOL Repository, select Master as the default branch and check Continuous Integration then click Create.
Note: We may have multiple repos and branches, so we need to select the correct Repo and Branch before we can select which Solution to build.
6. After clicking the Create button, On the Build tab click the Add build step in the Build pane.
7. In the Add tasks dialog, select the Utility page and then add a PowerShell task.
8. Still in the Add tasks dialog, select the Test page and add a Publish Test Results& task.
9. Select the Utility page again and add a Copy and Publish Artifacts task and then click on Close.
10. On the PowerShell Script task, click on the blue rename pencil icon and change the name of the step to dotnet restore, build, test and publish and click OK
11. Select File Path for the Type property, enter “build.ps1” for the Script filename property and $(BuildConfiguration) $(build.stagingDirectory) for the Arguments property.
Note: The build.ps1 script contains commands using the dotnet.exe executable used by .Net Core. The build script does the following: restore, build, test, publish, and produce an MSDeploy zip package.
[CmdletBinding()]
Param(
[Parameter(Mandatory=$True)] [string] $BuildConfiguration,
[Parameter(Mandatory=$True)] [string] $BuildStagingDirectory
)
$ErrorActionPreference = "Stop"
#### Restore and build projects
& dotnet restore
& dotnet build .\src\PartsUnlimitedWebsite --configuration $BuildConfiguration
& dotnet build .\test\PartsUnlimited.UnitTests --configuration $BuildConfiguration
#### Run tests
& dotnet test .\test\PartsUnlimited.UnitTests -xml testresults.xml
#### Publish
$publishDirectory = Join-Path $BuildStagingDirectory "Publish"
$outputDirectory = Join-Path $publishDirectory "PartsUnlimited"
& dotnet publish .\src\PartsUnlimitedWebsite --framework netcoreapp1.0 --output $outputDirectory --configuration $BuildConfiguration --no-build
#### Package to MSDeploy format
12. On the Publish Test Results task, change the Test Result Format to XUnit and the Test Results File to **/testresults.xml.
13. On the Copy Publish Artifact task, change the Copy Root property to $(build.stagingDirectory), The Contents property to **\*.zip, The Artifact Name property to drop and the Artifact Type to Server.
14 Select the Variables page and a new variable that will be used by the build.ps1 PowerShell script; BuildConfiguration with a value of release.
15. Click on the Triggers tab and verify that the Continuous integration (CI) option is selected to build the solution everytime a change is checked in. Also make sure the filter includes the appropriate branch (in this case master and Batch Changes checkbox is unchecked
Note: To enable Continuous integration in your project, check the Continuous integration (CI) checkbox. You can select which branch you wish to monitor, as well.
16. Click Save and give the build definition a name.
III. Test the CI Trigger in Visual Studio Team Services
We will now test the Continuous Integration build (CI) build we created by changing code in the Parts Unlimited project with Visual Studio Team Services.
1.
2. Navigate to /src/PartsUnlimitedWebsite/Controllers in the PartsUnlimited project, then click on the elipsis to the right of HomeController.cs and click Edit.
2. After clicking Edit, add in text (i.e. This is a test of CI) after the last Using statement. Once complete, click Save.
3. Click Build hub. This should have triggered the build we previously created.
4. Click on the Build Number, and you should get the build in progress. Here you can also see the commands being logged to console and the current steps that the build is on.
4. Click on the Build Number on the top left and you should get a build summary similar to this, which includes test results.
Next steps
In this lab, you learned how to push new code to Visual Studio Team Services, setup a Git repo and create a Continuous Integration build that runs when new commits are pushed to the master branch. This allows you to get feedback as to whether your changes made breaking syntax changes, or if they broke one or more automated tests, or if your changes are a okay.
Try these lab out for next step:


SportsPasta
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Add Photos
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Select an existing album
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Drop your files here (or click). Remember to click "Save Photos to selected album" buttons after selecting files
You can add captions to your photos later in gallery view.
Save Photos to selected album
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Take me to Photo Gallery


As per the syllabus, you are expected to attend, talk/write, and do group presentations for participation points. Every week you are expected to talk in class at least once, or post notes/reflections on the discussion board.
This paper is your final “participation” obligation. Write a paper answering the following questions in your own words (not argumentative paper, quotations are not required.)
Regardless of the title of this class — Describe, in your own words, what this class was about. What are the main themes or the one overriding theme?
What was your favorite reading or topic? Why?
What was your least favorite reading or topic? Why?
We discussed some controversial and sensitive topics. Did you find new reasons for a strong opinion on these topics? And did you learn reasons why the “other side” believes what they believe?
What is one topic on which you changed your mind? a. If so, what most affected you — was it the reading, the class discussion, the lecture, the disputation writing that most changed your mind? b. If not, what was the one topic that most challenged you?


--- layout: default ---
I love learning new stuffs, developing software, taking pictures, reading books, playing cricket, doing sketches, and sometimes writing. I have taught myself to speak in different languages, to code computer programs, to edit videos, and to draw stuffs.
To check out the photos and videos I have taken or the sketches I have drawn, hop over to the archives page.
I have been teaching myself coding since 2014, and I have developed softwares in numerous languages and frameworks. I have experience in the follow technologies:
To check out my pet projects, visit the projects page. You can also see my open-source contributions on my page.


Before Change
losses["network"] = network_loss
if any(distribution.regularization_loss() is not None for distribution in self.distributions.values()):
losses["distributions"] = tf.add_n(inputs=[
distribution.regularization_loss() for distribution in self.distributions.values()
if distribution.regularization_loss() is not None
])
if self.entropy_regularization is not None and self.entropy_regularization > 0.0:
entropies = list()
embedding = self.network.apply(x=states, internals=internals)
After Change
if "distributions" in losses:
losses["distributions"] += regularization_loss
else:
losses["distributions"] = regularization_loss
if self.entropy_regularization is not None and self.entropy_regularization > 0.0:
entropies = list()


Full Screen Slider (linear) #1
GSAP Timeline
Responsive
Super Simple
What else you want ! ;)
my other Pens


Table of Contents:
Some applications to not accept the default key stroke to paste a clip, ctrl-v. Starting in 3.15.1 custom key strokes can be set per application can be set to send the appropriate key stroke to paste the clip.
2) How to set a custom key stroke
Installed Version Example
Ex: ^p (sends ctrl-p)
Ex: %e{DELAY 50}p (sends Alt-e, delays 50 ms then sends p)
Ex: ^c (Sends ctrl-c)
Ex: ^x (Sends ctrl-x)
|
Key |
Code |
|
WINKEY |
@ |
|
SHIFT |
+ |
|
CTRL |
^ |
|
ALT |
% |
|
Key |
Code |
|
BACKSPACE |
{BACKSPACE}, {BS}, or {BKSP} |
|
BREAK |
{BREAK} |
|
CAPS LOCK |
{CAPSLOCK} |
|
DEL or DELETE |
{DELETE} or {DEL} |
|
DOWN ARROW |
{DOWN} |
|
END |
{END} |
|
ENTER |
{ENTER} or ~ |
|
ESC |
{ESC} |
|
HELP |
{HELP} |
|
HOME |
{HOME} |
|
INS or INSERT |
{INS} |
|
LEFT ARROW |
{LEFT} |
|
NUM LOCK |
{NUMLOCK} |
|
PAGE DOWN |
{PGDN} |
|
PAGE UP |
{PGUP} |
|
PRINT SCREEN |
{PRTSC} (reserved for future use) |
|
RIGHT ARROW |
{RIGHT} |
|
SCROLL LOCK |
{SCROLL} |
|
TAB |
{TAB} |
|
UP ARROW |
{UP} |
|
F1 |
{F1} |
|
F2 |
{F2} |
|
F3 |
{F3} |
|
F4 |
{F4} |
|
F5 |
{F5} |
|
F6 |
{F6} |
|
F7 |
{F7} |
|
F8 |
{F8} |
|
F9 |
{F9} |
|
F10 |
{F10} |
|
F11 |
{F11} |
|
F12 |
{F12} |
|
F13 |
{F13} |
|
F14 |
{F14} |
|
F15 |
{F15} |
|
F16 |
{F16} |
|
Keypad add |
{ADD} |
|
Keypad subtract |
{SUBTRACT} |
|
Keypad multiply |
{MULTIPLY} |
|
Keypad divide |
{DIVIDE} |
|
Key |
Code |
|
+ |
{PLUS} |
|
@ |
{AT} |
|
APPS |
{APPS} |
|
^ |
{CARET} |
|
~ |
{TILDE} |
|
{ } |
{LEFTBRACE} {RIGHTBRACE} |
|
( ) |
{LEFTPAREN} {RIGHTPAREN} |
|
Left/Right WINKEY |
{LWIN} {RWIN} |
|
WINKEY |
{WIN} equivalent to {LWIN} |
|
Command Syntax |
Action |
|
{VKEY X} |
Sends the VKEY of value X. Very useful if you don't want to recompile CSendKeys and add new Vkey to the hardcoded special keys table. For example, {VKEY 13} is equivalent to VK_RETURN. |
|
{BEEP X Y}} |
Beeps with a frequency of X and a duration of Y milliseconds. |
|
{DELAY X} |
Delays sending the next key of X milliseconds. After the delaying the following key, the subsequent keys will not be further delayed unless there is a default delay value (see DELAY=X). Example: {DELAY 1000} <-- delays subsequent key stroke for 1 second. |
|
{DELAY=X} |
Sets the default delay value to X milliseconds. This will cause every key to be delayed X ms. If a value is already set and you specify {DELAY Y} you will have your following key delay Y ms but the subsequent keys will be delayed X ms.
Example: {DELAY=1000} <-- all subsequent keys will be delayed for 1 second.
|
|
{APPACTIVATE WindowTitle} |
Activates an application using is WindowTitle. Very useful if you want to send different keys to different applications. |


Two die as tree falls on kombi Two people died when a tree fell on top of a commuter omnibus parked in Harare’s Mbare suburb during a storm that hit the capital yesterday afternoon. 18 Nov 2019, 22:40 by Lisa Magodo More to follow…


welcome to admin panel
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Class TransientBehavior
Time behavior for a VoltageDelay.
Inherited Members
System.Object.ToString()
System.Object.Equals(System.Object)
System.Object.Equals(System.Object, System.Object)
System.Object.ReferenceEquals(System.Object, System.Object)
System.Object.GetHashCode()
System.Object.GetType()
System.Object.MemberwiseClone()
Namespace: SpiceSharp.Components.DelayBehaviors
Assembly: SpiceSharp.dll
Syntax
public class TransientBehavior : BiasingBehavior, IBiasingBehavior, ITimeBehavior, IBehavior
Constructors
TransientBehavior(String)
Initializes a new instance of the TransientBehavior class.
Declaration
public TransientBehavior(string name)
Parameters
| Type | Name | Description |
|---|---|---|
| System.String | name | The identifier of the behavior. |
Remarks
The identifier of the behavior should be the same as that of the entity creating it.
Properties
BranchPtr
Nodes
Declaration
protected VectorElement<double> BranchPtr { get; }
Property Value
| Type | Description |
|---|---|
| VectorElement<System.Double> |
Signal
Gets the delayed signal.
Declaration
public DelayedSignal Signal { get; }
Property Value
| Type | Description |
|---|---|
| DelayedSignal |
Methods
Bind(Simulation, BindingContext)
Bind the behavior.
Declaration
public override void Bind(Simulation simulation, BindingContext context)
Parameters
| Type | Name | Description |
|---|---|---|
| Simulation | simulation | The simulation. |
| BindingContext | context | The context. |
Overrides
Unbind()
Unbind the behavior.
Declaration
public override void Unbind()
Overrides
Explicit Interface Implementations
ITimeBehavior.InitializeStates()
Calculates the state values from the current DC solution.
Declaration
void ITimeBehavior.InitializeStates()
Remarks
In this method, the initial value is calculated based on the operating point solution, and the result is stored in each respective StateDerivative or StateHistory.
ITimeBehavior.Load()
Perform time-dependent calculations.
Declaration
void ITimeBehavior.Load()


|
Halide
12.0.0
|
GeneratorParam is a templated class that can be used to modify the behavior of the Generator at code-generation time. More...
#include <Generator.h>
Inherits Internal::GeneratorParamImplBase< T >.
Public Member Functions | |
| template<typename T2 = T, typename std::enable_if<!std::is_same< T2, std::string >::value >::type * = nullptr> | |
| GeneratorParam (const std::string &name, const T &value) | |
| GeneratorParam (const std::string &name, const T &value, const T &min, const T &max) | |
| GeneratorParam (const std::string &name, const T &value, const std::map< std::string, T > &enum_map) | |
| GeneratorParam (const std::string &name, const std::string &value) | |
GeneratorParam is a templated class that can be used to modify the behavior of the Generator at code-generation time.
GeneratorParams are commonly specified in build files (e.g. Makefile) to customize the behavior of a given Generator, thus they have a very constrained set of types to allow for efficient specification via command-line flags. A GeneratorParam can be:
Halide::Type is treated as though it were an enum, with the mappings:
"int8" Halide::Int(8) "int16" Halide::Int(16) "int32" Halide::Int(32) "uint8" Halide::UInt(8) "uint16" Halide::UInt(16) "uint32" Halide::UInt(32) "float32" Halide::Float(32) "float64" Halide::Float(64)
No vector Types are currently supported by this mapping.
Definition at line 995 of file Generator.h.
|
inline |
Definition at line 998 of file Generator.h.
References Halide::Internal.
|
inline |
Definition at line 1002 of file Generator.h.
References Halide::Internal.
|
inline |
Definition at line 1006 of file Generator.h.
References Halide::Internal.
|
inline |
Definition at line 1010 of file Generator.h.
References Halide::Internal.


Bear Limak has a grid with N rows and N columns. Rows are numbered 0 through N-1, from top to bottom. Columns are numbered 0 through N-1, from left to right.
Limak is going to place N pawns on the grid. There must be exactly one pawn in each row, and exactly one pawn in each column.
There are M companies. Each of them bought one non-empty rectangle in Limak's grid. The i-th company bought a rectangle with coordinates r1[i], r2[i], c1[i], c2[i]. That is, the i-th company owns the cell in the intersection of the r-th row and the c-th column if and only if r1[i] ≤ r ≤ r2[i] and c1[i] ≤ c ≤ c2[i]. Of course, every cell belongs to at most one company. (I.e., it is guaranteed that the rectangles are disjoint.)
Every company wants some particular number of pawns in their rectangle. There must be exactly cnt[i] pawns on the rectangle owned by the i-th company.
You are given the
If there is no solution, return {-1} instead.
(I.e., the return value is a
The left drawing below shows rectangles owned by companies. There must be 0 pawns on a red rectangle, and there must be 2 pawns on a blue rectangle. The right drawing shows one of valid solutions.


Privacy
Your privacy policy here Use this to generate one for free: https://www.freeprivacypolicy.com/free-privacy-policy-generator.php
Your privacy policy here Use this to generate one for free: https://www.freeprivacypolicy.com/free-privacy-policy-generator.php


Money Play. How should Red play 21?
pips Red=167 White=150
(CorrectAnswer= 0/0, ErrorScore= 0)
It’s very easy to simply play bar/24, 13/11 here without thinking but Red needs a game plan. With White having his 5-pt made bar/24, 13/11 is just too loose and is actually a blunder.
Red’s plan should be to get his stacked checkers into play and start to build a home board/prime. To do that he doesn’t want the distraction of being blitzed in White’s home board.
Therefore, he should take the 23-pt anchor. This freezes White’s checkers on his 8-pt, gives Red the security of the anchor and allows him to concentrate on developing his forward position.
Bar/23, 6/5 is clearly the best play for Red’s game plan. The only other move that is not a blunder is bar/24, 23/21 but even that is a bad error as it tries for too much too soon.
This is a highly instructive position for understanding early game strategy.
Red’s plan should be to get his stacked checkers into play and start to build a home board/prime. To do that he doesn’t want the distraction of being blitzed in White’s home board.
Therefore, he should take the 23-pt anchor. This freezes White’s checkers on his 8-pt, gives Red the security of the anchor and allows him to concentrate on developing his forward position.
Bar/23, 6/5 is clearly the best play for Red’s game plan. The only other move that is not a blunder is bar/24, 23/21 but even that is a bad error as it tries for too much too soon.
This is a highly instructive position for understanding early game strategy.
1. Cubeful 2-ply bar/23 6/5 Eq.: -0.515 0.377 0.082 0.002 - 0.623 0.185 0.011 2. Cubeful 2-ply bar/24 13/11 Eq.: -0.540 (-0.024) 0.379 0.084 0.002 - 0.621 0.228 0.011 3. Cubeful 2-ply bar/22 Eq.: -0.580 (-0.064) 0.372 0.079 0.002 - 0.628 0.233 0.009 4. Cubeful 2-ply bar/24 23/21 Eq.: -0.583 (-0.067) 0.375 0.077 0.002 - 0.625 0.234 0.010 5. Cubeful 2-ply bar/23 8/7 Eq.: -0.586 (-0.070) 0.359 0.076 0.002 - 0.641 0.189 0.011


/* A brutal odyssey to the dark side of the DOM tree */
In one of his (very informative) video lectures, Douglas Crockford remarks that writing JavaScript for the web is 'programming in a hostile environment'. I had done my fair share of weird workarounds, and even occasonally gave up an on idea entirely because browsers just wouldn't support it, but before this project I never really realized just how powerless a programmer can be in the face of buggy, incompatible, and poorly designed platforms.
The plan was not ridiculously ambitious. I wanted to 'enhance' a textarea to the point where writing code in it is pleasant. This meant automatic indentation and, if possible at all, syntax highlighting.
In this document I describe the story of implementing this, for your education and amusement. A demonstration of the resulting program, along with the source code, can be found at the project website.
Note: some of the details given here no longer apply to the current CodeMirror codebase, which has evolved quite a bit in the meantime.
The very first attempt merely added auto-indentation to a textarea element. It would scan backwards through the content of the area, starting from the cursor, until it had enough information to decide how to indent the current line. It took me a while to figure out a decent model for indenting JavaScript code, but in the end this seems to work:
When scanning backwards through code one has to take string values, comments, and regular expressions (which are delimited by slashes) into account, because braces and semicolons and such are not significant when they appear inside them. Single-line ('//') comments turned out to be rather inefficient to check for when doing a backwards scan, since every time you encounter a newline you have to go on to the next newline to determine whether this line ends in a comment or not. Regular expressions are even worse ― without contextual information they are impossible to distinguish from the division operator, and I didn't get them working in this first version.
To find out which line to indent, and to make sure that adding or removing whitespace doesn't cause the cursor to jump in strange ways, it is necessary to determine which text the user has selected. Even though I was working with just a simple textarea at this point, this was already a bit of a headache.
On W3C-standards-respecting browsers, textarea nodes have
selectionStart
and selectionEnd
properties which nicely give you the amount of characters before
the start and end of the selection. Great!
Then, there is Internet Explorer. Internet Explorer also has an API for looking at and manipulating selections. It gives you information such as a detailed map of the space the selected lines take up on the screen, in pixels, and of course the text inside the selection. It does, however, not give you much of a clue on where the selection is located in the document.
After some experimentation I managed to work out an elaborate
method for getting something similar to the
selectionStart
and selectionEnd
values
in other browsers. It worked like this:
TextRange
object corresponding to the selection.TextRange
that covers the whole textarea element.TextRange
to the start of the second one.selectionEnd
is the second length, and selectionStart
is
the second minus the first one.That seemed to work, but when resetting the selection after modifying
the content of the textarea I ran into another interesting feature of
these TextRange
s: You can move their endpoints by a given number of
characters, which is useful when trying to set a cursor at the Nth
character of a textarea, but in this context, newlines are not
considered to be characters, so you'll always end up one character too
far for every newline you passed. Of course, you can count newlines
and compensate for this (though it is still not possible to position
the cursor right in front of a newline). Sheesh.
After ragging on Internet Explorer for a while, let us move on and rag on Firefox a bit. It turns out that, in Firefox, getting and setting the text content of a DOM element is unexplainably expensive, especially when there is a lot of text involved. As soon as I tried to use my indentation code to indent itself (some 400 lines), I found myself waiting for over four seconds every time I pressed enter. That seemed a little slow.
The solution was obvious: Since the text inside a textarea can only be
manipulated as one single big string, I had to spread it out over
multiple nodes. How do you spread editable content over multiple
nodes? Right! designMode
or contentEditable
.
Now I wasn't entirely naive about designMode
, I had been looking
into writing a non-messy WYSIWYG editor before, and at that time I had
concluded two things:
Basically, the good folks at Microsoft designed a really bad interface for putting editable documents in pages, and the other browsers, not wanting to be left behind, more or less copied that. And there isn't much hope for a better way to do this appearing anytime soon. Wise people probably use a Flash movie or (God forbid) a Java applet for these kind of things, though those are not without drawbacks either.
Anyway, seeing how using an editable document would also make syntax highlighting possible, I foolishly went ahead. There is something perversely fascinating about trying to build a complicated system on a lousy, unsuitable platform.
How does one do decent syntax highlighting? A very simple scanning can tell the difference between strings, comments, keywords, and other code. But this time I wanted to actually be able to recognize regular expressions, so that I didn't have any blatant incorrect behaviour anymore.
That brought me to the idea of doing a serious parse on the code. This would not only make detecting regular expressions much easier, it would also give me detailed information about the code, which can be used to determine proper indentation levels, and to make subtle distinctions in colouring, for example the difference between variable names and property names.
And hey, when we're parsing the whole thing, it would even be possible
to make a distinction between local and global variables, and colour
them differently. If you've ever programmed JavaScript you can
probably imagine how useful this would be ― it is ridiculously easy
to accidentally create global instead of local variables. I don't
consider myself a JavaScript rookie anymore, but it was (embarrasingly
enough) only this week that I realized that my habit of typing for
(name in object) ...
was creating a global variable name
, and that
I should be typing for (var name in object) ...
instead.
Re-parsing all the code the user has typed in every time he hits a key is obviously not feasible. So how does one combine on-the-fly highlighting with a serious parser? One option would be to split the code into top-level statements (functions, variable definitions, etc.) and parse these separately. This is horribly clunky though, especially considering the fact that modern JavaScripters often put all the code in a file in a single big object or function to prevent namespace pollution.
I have always liked continuation-passing style and generators. So the idea I came up with is this: An interruptable, resumable parser. This is a parser that does not run through a whole document at once, but parses on-demand, a little bit at a time. At any moment you can create a copy of its current state, which can be resumed later. You start parsing at the top of the code, and keep going as long as you like, but throughout the document, for example at every end of line, you store a copy of the current parser state.  It still knows exactly what the context was at that point, which local variables were defined, which unfinished statements were encountered, and so on.
But that, unfortunately, turned out to be not quite as easy as it sounds.
Of course, when working inside an editable frame we don't just
have to deal with text. The code will be represented by some kind
of DOM tree. My first idea was to set the white-space:
pre
style for the frame and try to work with mostly text,
with the occasional coloured span
element. It turned
out that support for white-space: pre
in browsers,
especially in editable frames, is so hopelessly glitchy that this
was unworkable.
Next I tried a series of div
elements, one per
line, with span
elements inside them. This seemed to
nicely reflect the structure of the code in a shallowly
hierarchical way. I soon realized, however, that my code would be
much more straightfoward when using no hierarchy whatsoever
― a series of span
s, with br
tags
at the end of every line. This way, the DOM nodes form a flat
sequence that corresponds to the sequence of the text ―
just extract text from span
nodes and substitute
newlines for br
nodes.
It would be a shame if the editor would fall apart as soon as
someone pastes some complicated HTML into it. I wanted it to be
able to deal with whatever mess it finds. This means using some
kind of HTML-normalizer that takes arbitrary HTML and flattens it
into a series of br
s and span
elements
that contain a single text node. Just like the parsing process, it
would be best if this did not have to done to the entire buffer
every time something changes.
It took some banging my head against my keyboard, but I found a very nice way to model this. It makes heavy use of generators, for which I used MochiKit's iterator framework. Bob Ippolito explains the concepts in this library very well in his blog post about it. (Also notice some of the dismissive comments at the bottom of that post. They say "I don't think I really want to learn this, so I'll make up some silly reason to condemn it.")
The highlighting process consists of the following elements: normalizing the DOM tree, extracting the text from the DOM tree, tokenizing this text, parsing the tokens, and finally adjusting the DOM nodes to reflect the structure of the code.
The first two, I put into a single generator. It scans the DOM
tree, fixing anything that is not a simple top-level
span
or br
, and it produces the text
content of the nodes (or a newline in case of a br
)
as its output ― each time it is called, it yields a string.
Continuation passing style was a good way to model this process in
an iterator, which has to be processed one step at a time. Look at
this simplified version:
function traverseDOM(start){ var cc = function(){return scanNode(start, stop);}; function stop(){ cc = stop; throw StopIteration; } function yield(value, c){ cc = c; return value; } function scanNode(node, c){ if (node.nextSibling) var nextc = function(){return scanNode(node.nextSibling, c);}; else var nextc = c; if (/* node is proper span element */) return yield(node.firstChild.nodeValue, nextc); else if (/* node is proper br element */) return yield("\n", nextc); else /* flatten node, yield its textual content */; } return {next: function(){return cc();}}; }
The variable c
stands for 'continuation', and cc
for 'current
continuation' ― that last variable is used to store the function to
continue with, when yielding a value to the outside world. Every time
control leaves this function, it has to make sure that cc
is set to
a suitable value, which is what yield
and stop
take care of.
The object that is returned contains a next
method, which is
MochiKit's idea of an iterator, and the initial continuation just
throws a StopIteration
, which is how MochiKit signals that an
iterator has reached its end.
The first lines of scanNode
extend the continuation with the task of
scanning the next node, if there is a next node. The rest of the
function decides what kind of value to yield
. Note that this is a
rather trivial example of this technique, since the process of going
through these nodes is basically linear (it was much, much more
complex in earlier versions), but still the trick with the
continuations makes the code shorter and, for those in the know,
clearer than the equivalent 'storing the iterator state in variables'
approach.
The next iterator that the input passes through is the
tokenizer. Well, actually, there is another iterator in between
that isolates the tokenizer from the fact that the DOM traversal
yields a bunch of separate strings, and presents them as a single
character stream (with a convenient peek
operation),
but this is not a very interesting one. What the tokenizer returns
is a stream of token objects, each of which has a
value
, its textual content, a type
, like
"variable"
, "operator"
, or just itself,
"{"
for example, in the case of significant
punctuation or special keywords. They also have a
style
, which is used later by the highlighter to give
their span
elements a class name (the parser will
still adjust this in some cases).
At first I assumed the parser would have to talk back to the
tokenizer about the current context, in order to be able to
distinguish those accursed regular expressions from divisions, but
it seems that regular expressions are only allowed if the previous
(non-whitespace, non-comment) token was either an operator, a
keyword like new
or throw
, or a specific
kind of punctuation ("[{}(,;:"
) that indicates a new
expression can be started here. This made things considerably
easier, since the 'regexp or no regexp' question could stay
entirely within the tokenizer.
The next step, then, is the parser. It does not do a very
thorough job because, firstly, it has to be fast, and secondly, it
should not go to pieces when fed an incorrect program. So only
superficial constructs are recognized, keywords that resemble each
other in syntax, such as while
and if
,
are treated in precisely the same way, as are try
and
else
― the parser doesn't mind if an
else
appears without an if
. Stuff that
binds variables, var
, function
, and
catch
to be precise, is treated with more care,
because the parser wants to know about local variables.
Inside the parser, three kinds of context are stored. Firstly, a set of known local variables, which is used to adjust the style of variable tokens. Every time the parser enters a function, a new set of variables is created. If there was already such a set (entering an inner function), a pointer to the old one is stored in the new one. At the end of the function, the current variable set is 'popped' off and the previous one is restored.
The second kind of context is the lexical context, this keeps track of whether we are inside a statement, block, or list. Like the variable context, it also forms a stack of contexts, with each one containing a pointer to the previous ones so that they can be popped off again when they are finished. This information is used for indentation. Every time the parser encounters a newline token, it attaches the current lexical context and a 'copy' of itself (more about that later) to this token.
The third context is a continuation context. This parser does not use straight continuation style, instead it uses a stack of actions that have to be performed. These actions are simple functions, a kind of minilanguage, they act on tokens, and decide what kind of new actions should be pushed onto the stack. Here are some examples:
function expression(type){ if (type in atomicTypes) cont(maybeoperator); else if (type == "function") cont(functiondef); else if (type == "(") cont(pushlex("list"), expression, expect(")"), poplex); else if (type == "operator") cont(expression); else if (type == "[") cont(pushlex("list"), commasep(expression), expect("]"), poplex); else if (type == "{") cont(pushlex("list"), commasep(objprop), expect("}"), poplex); else if (type == "keyword c") cont(expression); } function block(type){ if (type == "}") cont(); else pass(statement, block); }
The function cont
(for continue), will push the actions it is given
onto the stack (in reverse order, so that the first one will be popped
first). Actions such as pushlex
and poplex
merely adjust the
lexical environment, while others, such as expression
itself, do
actual parsing. pass
, as seen in block
, is similar to cont
, but
it does not 'consume' the current token, so the next action will again
see this same token. In block
, this happens when the function
determines that we are not at the end of the block yet, so it pushes
the statement
function which will interpret the current token as the
start of a statement.
These actions are called by a 'driver' function, which filters out the
whitespace and comments, so that the parser actions do not have to
think about those, and keeps track of some things like the indentation
of the current line and the column at which the current token ends,
which are stored in the lexical context and used for indentation.
After calling an action, if the action called cont
, this driver
function will return the current token, if pass
(or nothing) was
called, it will immediately continue with the next action.
This goes to show that it is viable to write a quite elaborate minilanguage in a macro-less language like JavaScript. I don't think it would be possible to do something like this without closures (or similarly powerful abstraction) though, I've certainly never seen anything like it in Java code.
The way a 'copy' of the parser was produced shows a nice usage
of closures. Like with the DOM transformer shown above, most of
the local state of the parser is held in a closure produced by
calling parse(stream)
. The function
copy
, which is local to the parser function, produces
a new closure, with copies of all the relevant variables:
function copy(){ var _context = context, _lexical = lexical, _actions = copyArray(actions); return function(_tokens){ context = _context; lexical = _lexical; actions = copyArray(_actions); tokens = _tokens; return parser; }; }
Where parser
is the object that contains the next
(driver)
function, and a reference to this copy
function. When the function
that copy
produces is called with a token stream as argument, it
updates the local variables in the parser closure, and returns the
corresponding iterator object.
Moving on, we get to the last stop in this chain of generators, the
actual highlighter. You can view this one as taking two streams as
input, on the one hand there is the stream of tokens from the parser,
and on the other hand there is the DOM tree as left by the DOM
transformer. If everything went correctly, these two should be
synchronized. The highlighter can look at the current token, see if
the span
in the DOM tree corresponds to it (has the same text
content, and the correct class), and if not it can chop up the DOM
nodes to conform to the tokens.
Every time the parser yields a newline token, the highligher
encounters a br
element in the DOM stream. It takes the copy of the
parser and the lexical context from this token and attaches them to
the DOM node. This way, a new highlighting process can be started from
that node by re-starting the copy of the parser with a new token
stream, which reads tokens from the DOM nodes starting at that br
element, and the indentation code can use the lexical context
information to determine the correct indentation at that point.
All the above can be done using the DOM interface that all major browsers have in common, and which is relatively free of weird bugs and abberrations. However, when the user is typing in new code, this must also be highlighted. For this to happen, the program must know where the cursor currently is, and because it mucks up the DOM tree, it has to restore this cursor position after doing the highlighting.
Re-highlighting always happens per line, because the copy of the parser is stored only at the end of lines. Doing this every time the user presses a key is terribly slow and obnoxious, so what I did was keep a list of 'dirty' nodes, and as soon as the user didn't type anyting for 300 milliseconds the program starts re-highlighting these nodes. If it finds more than ten lines must be re-parsed, it does only ten and waits another 300 milliseconds before it continues, this way the browser never freezes up entirely.
As mentioned earlier, Internet Explorer's selection model is not the most practical one. My attempts to build a wrapper that makes it look like the W3C model all stranded. In the end I came to the conclusion that I only needed two operations:
It turns out that the pixel-based selection model that Internet Explorer uses, which always seemed completely ludricrous to me, is perfect for the first case. Since the DOM transformation (generally) does not change the position of things, storing the pixel offsets of the selection makes it possible to restore that same selection, never mind what happened to the underlying DOM structure.
[Later addition: Note that this, due to the very random design of the TextRange interface, only really works when the whole selection falls within the visible part of the document.]
Doing the same with the W3C selection model is a lot harder. What I ended up with was this:
Range
object gives you.Now in the second case (getting the top-level node at the
cursor) the Internet Explorer cheat does not work. In the W3C
model this is rather easy, you have to do some creative parent-
and sibling-pointer following to arrive at the correct top-level
node, but nothing weird. In Internet Explorer, all we have to go
on is the parentElement
method on a
TextRange
, which gives the first element that
completely envelops the selection. If the cursor is inside a text
node, this is good, that text node tells us where we are. If the
cursor is between nodes, for example between two br
nodes, you get to top-level node itself back, which is remarkably
useless.
Unfortunately, Opera's selection implementation is buggy, and it
will give wildly incorrect Range
objects when the cursor
is between two nodes. This is a bit of a showstopper, and until I find
a workaround for that or it gets fixed, the highlighter doesn't work
properly in Opera.
Also, when one presses enter in a designMode
document in Firefox or Opera, a br
tag is inserted.
In Internet Explorer, pressing enter causes some maniacal gnome to
come out and start wrapping all the content before and after the
cursor in p
tags. I suppose there is something to be
said for that, in principle, though if you saw the tag soup of
font
s and nested paragraphs Internet Explorer
generates you would soon enough forget all about principle.
Anyway, getting unwanted p
tags slowed the
highlighter down terribly ― it had to overhaul the whole
DOM tree to remove them again, every time the user pressed enter.
Fortunately I could fix this by capturing the enter presses and
manually inserting a br
tag at the cursor.
On the subject of Internet Explorer's tag soup, here is an interesting
anecdote: One time, when testing the effect that modifying the content
of a selection had, I inspected the DOM tree and found a "/B"
element. This was not a closing tag, there are no closing tags in the
DOM tree, just elements. The nodeName
of this element was actually
"/B"
. That was when I gave up any notions of ever understanding the
profound mystery that is Internet Explorer.
Well, I despaired at times, but I did end up with a working JavaScript editor. I did not keep track of the amount of time I wasted on this, but I would estimate it to be around fifty hours. Finding workarounds for browser bugs can be a terribly nonlinear process. I just spent half a day working on a weird glitch in Firefox that caused the cursor in the editable frame to be displayed 3/4 line too high when it was at the very end of the document. Then I found out that setting the style.display of the iframe to "block" fixed this (why not?). I'm amazed how often issues that seem hopeless do turn out to be avoidable, even if it takes hours of screwing around and some truly non-obvious ideas.
For a lot of things, JavaScript + DOM elements are a surprisingly powerful platform. Simple interactive documents and forms can be written in browsers with very little effort, generally less than with most 'traditional' platforms (Java, Win32, things like WxWidgets). Libraries like Dojo (and a similar monster I once wrote myself) even make complex, composite widgets workable. However, when applications go sufficiently beyond the things that browsers were designed for, the available APIs do not give enough control, are nonstandard and buggy, and are often poorly designed. Because of this, writing such applications, when it is even possible, is painful process.
And who likes pain? Sure, when finding that crazy workaround,
subdueing the damn browser, and getting everything to work, there
is a certain macho thrill. But one can't help wondering how much
easier things like preventing the user from pasting pictures in
his source code would be on another platform. Maybe something like
Silverlight or whatever other new browser plugin gizmos people are
pushing these days will become the way to solve things like this
in the future. But, personally, I would prefer for those browser
companies to put some real effort into things like cleaning up and
standardising shady things like designMode
, fixing
their bugs, and getting serious about ECMAScript 4.
Which is probably not realistically going to happen anytime soon.
Some interesting projects similar to this:
If you have any remarks, criticism, or hints related to the above, drop me an e-mail at<EMAIL_ADDRESS>If you say something generally interesting, I'll include your reaction here at the bottom of this page.
Topics: JavaScript, advanced browser weirdness, cool programming techniques
Audience: Programmers, especially JavaScript programmers
Author: Marijn Haverbeke
Date: May 24th 2007


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Yancy Eliminates Spam With 1 API.


Modern webapps rely heavily on realtime feedback. The Torso library provides a framework for creating highly dynamic pages that stores view state for you. The Feedback framework intends to give the coder a semantic interface. When and event happend, Then a function will be performed, returning state To a destination. This demo shows pre-validation on the two fields. As the fields are edited, the user feedback is updated.
For more details on pushing and pulling, review the Form Model API.


{{ partial "header.html" . }}
Hello! I'm Andrew; I'm a software infrastructure engineer working on Vitess for Planetscale. Before that I worked at Slack on the datastores team, first as a Database Reliability Engineer, and then primarily on Vitess itself. I'm also a Vitess maintainer.
A teammate once referred to me as a Professional Database Mercenary.
When I'm not working on databases, you can find me tinkering on a side project (usually in Go), or out for a run, reading a book, or playing a video game (usually by FromSoftware).


What's the Worst That Could Happen?
What's the Worst That Could Happen? is a movie starring Martin Lawrence, Danny DeVito, and John Leguizamo. A rich man catches a thief burglarizing his home and steals the thief's lucky ring, who then tries to get it back.


dataset detach COLLECTION_NAME KEY [SEMVER]
dataset detach COLLECTION_NAME KEY [SEMVER] ATTACHMENT_NAME
detach writes out (to local disc) the items that have been attached to a JSON record in the collection with the matching KEY
Write out all the attached files for k1 in collection named “publications.ds”
dataset detach publications.ds k1
Write out only the stats.xlsx file attached to k1
dataset detach publications.ds k1 stats.xlsx
Write out only the v0.0.1 stats.xlsx file attached to k1
dataset detach publications.ds k1 v0.0.1 stats.xlsx
Related topics: attach, attachments, and prune


git clone https://github.com/fiddlerwoaroof/cl-edn.git ~/quicklisp/local-projects/cl-edn/
(ql:quickload :cl-edn/fset)
This library divides the task of parsing EDN into two stages. In the
first stage, implemented by (EDN:READ-EDN string)
an EDN file is is
parsed into an AST where primitives are converted into lisp values and
compound forms are converted into lists of the form
(type-specifier . data)
. This AST can be passed to
(EDN:SYNTHESIZE implementation ast)
to produce datastructures of a
specific kind. The system cl-edn/fset
provides a synthesizer that
produces appropriate fset datastructures. The system
cl-edn/fset-lossy
produces fset datastructures, but forces symbols
and keywords to have uppercase names, for easier interoperation with
CL's default readtable. As a convenience, there is also
(EDN:PARSE string &optional (implementation 'fset))
that combines
the two steps into a single call. These implementations can passed to
PARSE
and SYNTHESIZE
either as the symbols EDN:FSET
and
EDN:FSET-LOSSY
or by instantiating the classes named by those symbols.
EDN:SYNTHESIZE
is a generic function that takes an implementation as
the first argument. The main system, CL-EDN
, provides two
implementations of this function: one that specializes the first
argument on SYMBOL
, that just makes an instance of the class named
by IMPLEMENTATION
and calls EDN:SYNTHESIZE
with the instance as
its first argument; the other implementation inspects the second
argument and, if it is a list, it delegates to
(EDN:SYNTHESIZE-COMPOUND IMPLEMENTATION DISCRIMINATOR ARGS)
, the
head of the list as DISCRIMINATOR
and the tail as ARGS
. The
default implementation of this generic also provides methods for
strings, symbols and keywords that produce the relevant lisp types, as
well as an implementation for tagged literals that implements #inst
and #uuid
and produces a form (:TAGGED TAG-SYMBOL DATA)
where
DATA
is synthesized according to the rules governing
IMPLEMENTATION
(e.g. the FSET
implementation makes DATA
to be an
instance of the datastructures provided by the FSET
library). Tags
can also be added to the default implementation by providing an
EQL-specialized method of (EDN:SYNTHESIZE-TAG IMPLEMENTATION TAG ARG)
for the symbol you want to define a behavior for. When this method is
called, the tag-symbol will be uppercased and converted into a common
lisp keyword and the ARG
will have been synthesized according to the
rules provided by IMPLEMENTATION
. To override this behavior, an
implementation can override EDN:SYNTHESIZE-COMPOUND
, but such
implementations should either call CALL-NEXT-METHOD
or implement
#inst
and #uuid
processing themselves.


Curriculum Vitae
Publications
Videos
{{event.itemChanged | capitalize}} updated to:
{{event.newValue}}


2017-2018
Tensegrity structure is a newly-developed structure built with compressive and tensile parts. In this undergraduate research project, I studied the theory and control method for the rolling of a six-rod spherical tensegrity robot, which has great potentials for planetary exploration. I hope my experimental results would be helpful for deeper understanding of tensegrity structure and its inherent properties so as to promote the study of more effective locomotion control for this kind of robots.
NTRTsim (a robot simulation toolbox developed by NASA) and MATLAB simulations are two important parts of my work. I've done several simulations using evolutionary algorithm and CPG control to generate different gaits for a 6-bar tensegrity robot.


Headings
First-level headings are marked up using ‹h1›
tags.
Heading level one
The heading above is a first-level heading that may be used for page titles as well as titles in sectioning elements including ‹body›
, ‹section›
and ‹article›
.
Second-level headings are marked up using ‹h2›
tags.
Heading level two
The heading above is a second-level heading. You may use more than one to create a document, section or article outline.
Third-level headings are marked up using ‹h3›
tags.
Heading level three
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European Space Agency with a Record Budget
European Space Agency (ESA) members agreed Thursday a record 14.4 billion euros budget, promising to maintain Europe's place at the top table as the United States and China press ahead and industry disruptors such as Elon Musk's Space X present new challenges, AFP reported.
The budget is split, with a total of EUR 12.5 billion over three years and a total of EUR 14.4 billion over five, an increase of around four billion compared to the previous budget.
"Its a surprise, even more than I proposed... this is good," ESA head Jan Woerner told a press conference after ministers from 22 Member States met in Seville for two days.
Woerner said the funding pledges mean that ESA can implement a full series of programs plus additional scientific work, pointing out steps to increase ground monitoring as part of efforts to monitor climate change, among other things.
"It is a giant step forward for Europe," said Jean-Yves Le Gall, head of the French space agency.
"We broke all records in terms of financial contributions," Le Gall added.
Germany made the largest contribution to the budget - around € 3.3 billion, followed by France - € 2.7 billion, Italy - € 2.3 billion and the United Kingdom with € 1.7 billion.
ESA is not a body of the European Union and therefore the UK's position as a member remains unchanged despite Brexit.
Among the projects highlighted by ESA were the first Laser Interferometer Space Antenna, LISA and the Athena Mission, designed to "make fundamental progress in our understanding of the basic physics of the universe."
ESA has confirmed its commitment to the International Space Station by 2030 and its participation in the Gateway project, the first space station scheduled to orbit the moon.


The Way JavaScript Works
Our goal is to write JavaScript code that runs in the
browser when your web page is loaded—that code might
respond to user actions, update or change the page,
communicate with web services, and in general make
your page feel more like an application than a document.
Let’s look at how all that works:
-
You create your HTML
markup and your
JavaScript code and put
them in files, say
index.html and index.js
(or they both can go in
the HTML file).
-
The browser retrieves and
loads your page, parsing
its contents from top to
bottom.
As it encounters JavaScript,
the browser parses the
code and checks it for
correctness, and then
executes the code.
The browser also builds an
internal model of the HTML
page, called the DOM.
-
JavaScript continues
executing, using the
DOM to examine the
page, change it, receive
events from it, or ask
the browser to retrieve
other data from the
web server.
Handling events
-
Set up a handler to handle the user’s click on the “Add Song” button.
-
Write the handler to get the song name the user typed in, and then...
-
Create a new element to hold the new song, and...
-
Add the element to the page’s DOM.


|
YASK
Yet Another Stencil Kit: a software framework for creating HPC stencil code. Copyright 2014-2023 Intel Corporation.
|
A compile-time data variable. More...
#include <yask_compiler_api.hpp>
Public Member Functions | |
| virtual const std::string & | get_name () const =0 |
| Get the name of the var. | |
| virtual int | get_num_dims () const =0 |
| Get the number of dimensions. | |
| virtual string_vec | get_dim_names () const =0 |
| Get all the dimensions in this var. | |
| virtual yc_var_point_node_ptr | new_var_point (const std::vector< yc_number_node_ptr > &index_exprs)=0 |
| Create a reference to a point in this var. | |
| virtual yc_var_point_node_ptr | new_var_point (const std::initializer_list< yc_number_node_ptr > &index_exprs)=0 |
| Create a reference to a point in this var. | |
| virtual bool | is_dynamic_step_alloc () const =0 |
| [Advanced] Get whether the allocation of the step dimension of this var can be modified at run-time. | |
| virtual void | set_dynamic_step_alloc (bool is_dynamic)=0 |
| [Advanced] Set whether the allocation of the step dimension of this var can be modified at run-time. | |
| virtual idx_t | get_step_alloc_size () const =0 |
| [Advanced] Get the current allocation in the step dimension of this var. | |
| virtual void | set_step_alloc_size (idx_t size)=0 |
| [Advanced] Set the current allocation in the step dimension of this var. | |
| virtual YASK_DEPRECATED yc_var_point_node_ptr | new_relative_var_point (const std::vector< int > &dim_offsets)=0 |
| [Deprecated] Use new_var_point(). | |
| virtual YASK_DEPRECATED yc_var_point_node_ptr | new_relative_var_point (const std::initializer_list< int > &dim_offsets)=0 |
| [Deprecated] Use new_var_point(). | |
| YASK_DEPRECATED yc_var_point_node_ptr | new_grid_point (const std::vector< yc_number_node_ptr > &index_exprs) |
| [Deprecated] Use new_var_point(). | |
| YASK_DEPRECATED yc_var_point_node_ptr | new_grid_point (const std::initializer_list< yc_number_node_ptr > &index_exprs) |
| [Deprecated] Use new_var_point(). | |
| YASK_DEPRECATED yc_var_point_node_ptr | new_relative_grid_point (const std::vector< int > &dim_offsets) |
| [Deprecated] Use new_relative_var_point(). | |
| YASK_DEPRECATED yc_var_point_node_ptr | new_relative_grid_point (const std::initializer_list< int > &dim_offsets) |
| [Deprecated] Use new_relative_var_point(). | |
A compile-time data variable.
"Var" is a generic term for any n-dimensional variable. A 0-dim var is a scalar, a 1-dim var is an array, etc. A compile-time variable is used for constructing stencil equations. It does not contain any data. Data is only stored during run-time, using a yk_var.
Created via yc_solution::new_var() or yc_solution::new_scratch_var() or implicitly via the yc_var_proxy constructor.
|
pure virtual |
Get the name of the var.
|
pure virtual |
Get the number of dimensions.
|
pure virtual |
Get all the dimensions in this var.
This is not necessarily a list of all the dimensions used in the yc_solution.
|
pure virtual |
Create a reference to a point in this var.
Each expression in index_exprs
describes how to access an element in the corresponding dimension of the var.
| [in] | index_exprs | Index expressions. These must appear in the same order as when the var was created. |
|
pure virtual |
Create a reference to a point in this var.
C++ initializer-list version with same semantics as the vector version of new_var_point().
See example code shown in yc_solution::new_var().
|
pure virtual |
[Advanced] Get whether the allocation of the step dimension of this var can be modified at run-time.
|
pure virtual |
[Advanced] Set whether the allocation of the step dimension of this var can be modified at run-time.
| [in] | is_dynamic | true to enable or false to disable. |
|
pure virtual |
[Advanced] Get the current allocation in the step dimension of this var.
If set_step_alloc_size() has been called, that setting will be returned. If set_step_alloc_size() has not been called, the default setting determined by the YASK compiler will be returned.
|
pure virtual |
[Advanced] Set the current allocation in the step dimension of this var.
Override the default setting determined by the YASK compiler for allocation in the step dimension.
| [in] | size | Number of elements to allocate in the step dimension. |


MENTHOLATUM DEEP HEATING RUB EXTRA STRENGTH- menthol and methyl salicylate cream
The Mentholatum Company
Disclaimer: Most OTC drugs are not reviewed and approved by FDA, however they may be marketed if they comply with applicable regulations and policies. FDA has not evaluated whether this product complies.
Active ingredients
Menthol 8%
Methyl salicylate 30%
Purpose
Menthol - External analgesic
Methyl salicylate - External analgesic
Uses
temporarily relieves minor aches and pains of muscles and joints due to
- •
- arthritis
- •
- strains
- •
- simple backache
- •
- sprains
Warnings
For external use only
When using this product
- •
- use only as directed
- •
- do not get into eyes or on mucous membranes
- •
- do not apply to wounds or damaged skin
- •
- do not bandage tightly
- •
- do not use with heating pad or apply external heat
Stop use and ask a doctor if
- •
- condition worsens
- •
- excessive irritation of the skin develops
- •
- pain persists for more than 7 days
- •
- symptoms clear up and occur again within a few days
Keep out of reach of children.
If swallowed, get medical help or contact a Poison Control Center right away.
Directions
- •
- adults and children 2 years and over: apply to affected area not more than 3 to 4 times daily
- •
- children under 2 years: ask a doctor
Inactive ingredients
glyceryl stearate, isoceteh-20, poloxamer 407, purified water, quaternium-15, sodium lauryl sulfate, sorbitan stearate
Questions or comments?
Toll free 1-877-636-2677 MON-FRI 9 AM to 5 PM (EST)
www.mentholatum.com
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