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The constants.php
We just need to add two custom constants in our application/config/constants.php
for our common assets.
defined('ASSETS_BASE') OR define('ASSETS_BASE', 'https://www.example.com/assets/');
defined('ASSETS_PATH') OR define('ASSETS_PATH', '../assets/');
The ASSETS_BASE
constant is for our stylesheets
, javascripts
, images
, etc. You will need to prepend all of your asset links (css, js, img, etc) with this constant.
For example:
<link rel="stylesheet" type="text/css" href="<?=ASSETS_BASE;?>css/styles.css" />
<img src="<?=ASSETS_BASE;?>images/my-image.jpg" />
The ASSETS_PATH
constant is for our php
scripts to access any files within the assets
folder. Use it for upload paths etc.


[§302A-484] Transfer by the department of education. The department of education may transfer a minor to the minor's home school if the minor has been enrolled in a school based on an invalid caregiver affidavit. [L 2003, c 99, pt of §1]


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Machine learning
Youjun Hu
<EMAIL_ADDRESS>May 29, 2023
1
Introduction
2
Neural network
2.1
Node (neuron or unit), weight, bias, and activation
2.2
Loss function
2.3
Gradients of loss function
2.4
Back-propagating algorithm
References
3
miscs


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 Rather than write schema modifications in pure SQL, migrations allow you to use an easy Ruby DSL to describe changes to your tables.
After reading this guide, you will know:
-
The generators you can use to create them.
-
The methods Active Record provides to manipulate your database.
-
The Rake tasks that manipulate migrations and your schema.
-
How migrations relate to
schema.rb
.
Migration Overview¶ ↑
Migrations are a convenient way to alter your database schema over time in a consistent and easy way. They use a Ruby DSL so that you don't have to write SQL by hand, allowing your schema and changes to be database independent.
You can think of each migration as being a new 'version' of the
database. A schema starts off with nothing in it, and each migration
modifies it to add or remove tables, columns, or entries. Active Record
knows how to update your schema along this timeline, bringing it from
whatever point it is in the history to the latest version. Active Record
will also update your db/schema.rb
file to match the
up-to-date structure of your database.
Here's an example of a migration:
class CreateProducts < ActiveRecord::Migration def change create_table :products do |t| t.string :name t.text :description t.timestamps null: false end end end
This migration adds a table called products
with a string
column called name
and a text column called
description
. A primary key column called id
will
also be added implicitly, as it's the default primary key for all
Active Record models. The timestamps
macro adds two columns,
created_at
and updated_at
. These special columns
are automatically managed by Active Record if they exist.
Note that we define the change that we want to happen moving forward in time. Before this migration is run, there will be no table. After, the table will exist. Active Record knows how to reverse this migration as well: if we roll this migration back, it will remove the table.
On databases that support transactions with statements that change the schema, migrations are wrapped in a transaction. If the database does not support this then when a migration fails the parts of it that succeeded will not be rolled back. You will have to rollback the changes that were made by hand.
 If
your adapter supports DDL transactions you can use
disable_ddl_transaction!
to disable them for a single
migration.
If you wish for a migration to do something that Active Record doesn't
know how to reverse, you can use reversible
:
class ChangeProductsPrice < ActiveRecord::Migration def change reversible do |dir| change_table :products do |t| dir.up { t.change :price, :string } dir.down { t.change :price, :integer } end end end end
Alternatively, you can use up
and down
instead of
change
:
class ChangeProductsPrice < ActiveRecord::Migration def up change_table :products do |t| t.change :price, :string end end def down change_table :products do |t| t.change :price, :integer end end end
Creating a Migration¶ ↑
Creating a Standalone Migration¶ ↑
Migrations are stored as files in the db/migrate
directory,
one for each migration class. The name of the file is of the form
YYYYMMDDHHMMSS_create_products.rb
, that is to say a UTC
timestamp identifying the migration followed by an underscore followed by
the name of the migration. The name of the migration class (CamelCased
version) should match the latter part of the file name. For example
20080906120000_create_products.rb
should define class
CreateProducts
and
20080906120001_add_details_to_products.rb
should define
AddDetailsToProducts
. Rails uses this timestamp to determine
which migration should be run and in what order, so if you're copying a
migration from another application or generate a file yourself, be aware of
its position in the order.
Of course, calculating timestamps is no fun, so Active Record provides a generator to handle making it for you:
$ bin/rails generate migration AddPartNumberToProducts
This will create an empty but appropriately named migration:
class AddPartNumberToProducts < ActiveRecord::Migration def change end end
If the migration name is of the form “AddXXXToYYY” or “RemoveXXXFromYYY”
and is followed by a list of column names and types then a migration
containing the appropriate add_column
and
remove_column
statements will be created.
$ bin/rails generate migration AddPartNumberToProducts part_number:string
will generate
class AddPartNumberToProducts < ActiveRecord::Migration def change add_column :products, :part_number, :string end end
If you'd like to add an index on the new column, you can do that as well:
$ bin/rails generate migration AddPartNumberToProducts part_number:string:index
will generate
class AddPartNumberToProducts < ActiveRecord::Migration def change add_column :products, :part_number, :string add_index :products, :part_number end end
Similarly, you can generate a migration to remove a column from the command line:
$ bin/rails generate migration RemovePartNumberFromProducts part_number:string
generates
class RemovePartNumberFromProducts < ActiveRecord::Migration def change remove_column :products, :part_number, :string end end
You are not limited to one magically generated column. For example:
$ bin/rails generate migration AddDetailsToProducts part_number:string price:decimal
generates
class AddDetailsToProducts < ActiveRecord::Migration def change add_column :products, :part_number, :string add_column :products, :price, :decimal end end
If the migration name is of the form “CreateXXX” and is followed by a list of column names and types then a migration creating the table XXX with the columns listed will be generated. For example:
$ bin/rails generate migration CreateProducts name:string part_number:string
generates
class CreateProducts < ActiveRecord::Migration def change create_table :products do |t| t.string :name t.string :part_number end end end
As always, what has been generated for you is just a starting point. You
can add or remove from it as you see fit by editing the
db/migrate/YYYYMMDDHHMMSS_add_details_to_products.rb
file.
Also, the generator accepts column type as references
(also
available as belongs_to
). For instance:
$ bin/rails generate migration AddUserRefToProducts user:references
generates
class AddUserRefToProducts < ActiveRecord::Migration def change add_reference :products, :user, index: true end end
This migration will create a user_id
column and appropriate
index.
There is also a generator which will produce join tables if
JoinTable
is part of the name:
$ bin/rails g migration CreateJoinTableCustomerProduct customer product
will produce the following migration:
class CreateJoinTableCustomerProduct < ActiveRecord::Migration def change create_join_table :customers, :products do |t| # t.index [:customer_id, :product_id] # t.index [:product_id, :customer_id] end end end
Model Generators¶ ↑
The model and scaffold generators will create migrations appropriate for adding a new model. This migration will already contain instructions for creating the relevant table. If you tell Rails what columns you want, then statements for adding these columns will also be created. For example, running:
$ bin/rails generate model Product name:string description:text
will create a migration that looks like this
class CreateProducts < ActiveRecord::Migration def change create_table :products do |t| t.string :name t.text :description t.timestamps null: false end end end
You can append as many column name/type pairs as you want.
Passing Modifiers¶ ↑
Some commonly used type modifiers can be passed directly on the command line. They are enclosed by curly braces and follow the field type:
For instance, running:
$ bin/rails generate migration AddDetailsToProducts 'price:decimal{5,2}' supplier:references{polymorphic}
will produce a migration that looks like this
class AddDetailsToProducts < ActiveRecord::Migration def change add_column :products, :price, :decimal, precision: 5, scale: 2 add_reference :products, :supplier, polymorphic: true, index: true end end
TIP: Have a look at the generators help output for further details.
Writing a Migration¶ ↑
Once you have created your migration using one of the generators it's time to get to work!
Creating a Table¶ ↑
The create_table
method is one of the most fundamental, but
most of the time, will be generated for you from using a model or scaffold
generator. A typical use would be
create_table :products do |t| t.string :name end
which creates a products
table with a column called
name
(and as discussed below, an implicit id
column).
By default, create_table
will create a primary key called
id
. You can change the name of the primary key with the
:primary_key
option (don't forget to update the
corresponding model) or, if you don't want a primary key at all, you
can pass the option id: false
. If you need to pass database
specific options you can place an SQL fragment in the :options
option. For example:
create_table :products, options: "ENGINE=BLACKHOLE" do |t| t.string :name, null: false end
will append ENGINE=BLACKHOLE
to the SQL statement used to
create the table (when using MySQL, the default is
ENGINE=InnoDB
).
Creating a Join Table¶ ↑
Migration method create_join_table
creates a HABTM join table.
A typical use would be:
create_join_table :products, :categories
which creates a categories_products
table with two columns
called category_id
and product_id
. These columns
have the option :null
set to false
by default.
This can be overridden by specifying the :column_options
option.
create_join_table :products, :categories, column_options: {null: true}
will create the product_id
and category_id
with
the :null
option as true
.
You can pass the option :table_name
when you want to customize
the table name. For example:
create_join_table :products, :categories, table_name: :categorization
will create a categorization
table.
create_join_table
also accepts a block, which you can use to
add indices (which are not created by default) or additional columns:
create_join_table :products, :categories do |t| t.index :product_id t.index :category_id end
Changing Tables¶ ↑
A close cousin of create_table
is change_table
,
used for changing existing tables. It is used in a similar fashion to
create_table
but the object yielded to the block knows more
tricks. For example:
change_table :products do |t| t.remove :description, :name t.string :part_number t.index :part_number t.rename :upccode, :upc_code end
removes the description
and name
columns, creates
a part_number
string column and adds an index on it. Finally
it renames the upccode
column.
Changing Columns¶ ↑
Like the remove_column
and add_column
Rails
provides the change_column
migration method.
change_column :products, :part_number, :text
This changes the column part_number
on products table to be a
:text
field.
Besides change_column
, the change_column_null
and
change_column_default
methods are used specifically to change
the null and default values of a column.
change_column_null :products, :name, false change_column_default :products, :approved, false
This sets :name
field on products to a NOT NULL
column and the default value of the :approved
field to false.
TIP: Unlike change_column
(and
change_column_default
), change_column_null
is
reversible.
Column Modifiers¶ ↑
Column modifiers can be applied when creating or changing a column:
-
limit
Sets the maximum size of thestring/text/binary/integer
fields. -
precision
Defines the precision for thedecimal
fields, representing the total number of digits in the number. -
scale
Defines the scale for thedecimal
fields, representing the number of digits after the decimal point. -
polymorphic
Adds atype
column forbelongs_to
associations. -
null
Allows or disallowsNULL
values in the column. -
default
Allows to set a default value on the column. Note that if you are using a dynamic value (such as a date), the default will only be calculated the first time (i.e. on the date the migration is applied). -
index
Adds an index for the column. -
required
Addsrequired: true
forbelongs_to
associations andnull: false
to the column in the migration.
Some adapters may support additional options; see the adapter specific API docs for further information.
Foreign Keys¶ ↑
While it's not required you might want to add foreign key constraints to guarantee referential integrity.
add_foreign_key :articles, :authors
This adds a new foreign key to the author_id
column of the
articles
table. The key references the id
column
of the authors
table. If the column names can not be derived
from the table names, you can use the :column
and
:primary_key
options.
Rails will generate a name for every foreign key starting with
fk_rails_
followed by 10 random characters. There is a
:name
option to specify a different name if needed.
NOTE: Active Record only supports single column foreign keys.
execute
and structure.sql
are required to use
composite foreign keys.
Removing a foreign key is easy as well:
# let Active Record figure out the column name remove_foreign_key :accounts, :branches # remove foreign key for a specific column remove_foreign_key :accounts, column: :owner_id # remove foreign key by name remove_foreign_key :accounts, name: :special_fk_name
When Helpers aren't Enough¶ ↑
If the helpers provided by Active Record aren't enough you can use the
execute
method to execute arbitrary SQL:
Product.connection.execute('UPDATE `products` SET `price`=`free` WHERE 1')
For more details and examples of individual methods, check the API
documentation. In particular the documentation for ActiveRecord::ConnectionAdapters::SchemaStatements
(which provides the methods available in the change
,
up
and down
methods), ActiveRecord::ConnectionAdapters::TableDefinition
(which provides the methods available on the object yielded by
create_table
) and ActiveRecord::ConnectionAdapters::Table
(which provides the methods available on the object yielded by
change_table
).
Using the change
Method¶ ↑
The change
method is the primary way of writing migrations. It
works for the majority of cases, where Active Record knows how to reverse
the migration automatically. Currently, the change
method
supports only these migration definitions:
-
add_column
-
add_index
-
add_reference
-
add_timestamps
-
add_foreign_key
-
create_table
-
create_join_table
-
drop_table
(must supply a block) -
drop_join_table
(must supply a block) -
remove_timestamps
-
rename_column
-
rename_index
-
remove_reference
-
rename_table
change_table
is also reversible, as long as the block does not
call change
, change_default
or
remove
.
If you're going to need to use any other methods, you should use
reversible
or write the up
and down
methods instead of using the change
method.
Using reversible
¶ ↑
Complex migrations may require processing that Active Record doesn't
know how to reverse. You can use reversible
to specify what to
do when running a migration what else to do when reverting it. For example:
class ExampleMigration < ActiveRecord::Migration def change create_table :distributors do |t| t.string :zipcode end reversible do |dir| dir.up do # add a CHECK constraint execute <<-SQL ALTER TABLE distributors ADD CONSTRAINT zipchk CHECK (char_length(zipcode) = 5) NO INHERIT; SQL end dir.down do execute <<-SQL ALTER TABLE distributors DROP CONSTRAINT zipchk SQL end end add_column :users, :home_page_url, :string rename_column :users, :email, :email_address end end
Using reversible
will ensure that the instructions are
executed in the right order too. If the previous example migration is
reverted, the down
block will be run after the
home_page_url
column is removed and right before the table
distributors
is dropped.
Sometimes your migration will do something which is just plain
irreversible; for example, it might destroy some data. In such cases, you
can raise ActiveRecord::IrreversibleMigration
in your
down
block. If someone tries to revert your migration, an
error message will be displayed saying that it can't be done.
Using the up
/down
Methods¶ ↑
You can also use the old style of migration using up
and
down
methods instead of the change
method. The
up
method should describe the transformation you'd like to
make to your schema, and the down
method of your migration
should revert the transformations done by the up
method. In
other words, the database schema should be unchanged if you do an
up
followed by a down
. For example, if you create
a table in the up
method, you should drop it in the
down
method. It is wise to reverse the transformations in
precisely the reverse order they were made in the up
method.
The example in the reversible
section is equivalent to:
class ExampleMigration < ActiveRecord::Migration def up create_table :distributors do |t| t.string :zipcode end # add a CHECK constraint execute <<-SQL ALTER TABLE distributors ADD CONSTRAINT zipchk CHECK (char_length(zipcode) = 5); SQL add_column :users, :home_page_url, :string rename_column :users, :email, :email_address end def down rename_column :users, :email_address, :email remove_column :users, :home_page_url execute <<-SQL ALTER TABLE distributors DROP CONSTRAINT zipchk SQL drop_table :distributors end end
If your migration is irreversible, you should raise
ActiveRecord::IrreversibleMigration
from your
down
method. If someone tries to revert your migration, an
error message will be displayed saying that it can't be done.
Reverting Previous Migrations¶ ↑
You can use Active Record's ability to rollback migrations using the
revert
method:
require_relative '2012121212_example_migration' class FixupExampleMigration < ActiveRecord::Migration def change revert ExampleMigration create_table(:apples) do |t| t.string :variety end end end
The revert
method also accepts a block of instructions to
reverse. This could be useful to revert selected parts of previous
migrations. For example, let's imagine that
ExampleMigration
is committed and it is later decided it would
be best to use Active Record validations, in place of the
CHECK
constraint, to verify the zipcode.
class DontUseConstraintForZipcodeValidationMigration < ActiveRecord::Migration def change revert do # copy-pasted code from ExampleMigration reversible do |dir| dir.up do # add a CHECK constraint execute <<-SQL ALTER TABLE distributors ADD CONSTRAINT zipchk CHECK (char_length(zipcode) = 5); SQL end dir.down do execute <<-SQL ALTER TABLE distributors DROP CONSTRAINT zipchk SQL end end # The rest of the migration was ok end end end
The same migration could also have been written without using
revert
but this would have involved a few more steps:
reversing the order of create_table
and
reversible
, replacing create_table
by
drop_table
, and finally replacing up
by
down
and vice-versa. This is all taken care of by
revert
.
Running Migrations¶ ↑
Rails provides a set of Rake tasks to run certain sets of migrations.
The very first migration related Rake task you will use will probably be
rake db:migrate
. In its most basic form it just runs the
change
or up
method for all the migrations that
have not yet been run. If there are no such migrations, it exits. It will
run these migrations in order based on the date of the migration.
Note that running the db:migrate
task also invokes the
db:schema:dump
task, which will update your
db/schema.rb
file to match the structure of your database.
If you specify a target version, Active Record will run the required migrations (change, up, down) until it has reached the specified version. The version is the numerical prefix on the migration's filename. For example, to migrate to version<PHONE_NUMBER>0000 run:
$ bin/rake db:migrate VERSION=20080906120000
If version<PHONE_NUMBER>0000 is greater than the current version (i.e., it is
migrating upwards), this will run the change
(or
up
) method on all migrations up to and including
20080906120000, and will not execute any later migrations. If migrating
downwards, this will run the down
method on all the migrations
down to, but not including,<PHONE_NUMBER>0000.
Rolling Back¶ ↑
A common task is to rollback the last migration. For example, if you made a mistake in it and wish to correct it. Rather than tracking down the version number associated with the previous migration you can run:
$ bin/rake db:rollback
This will rollback the latest migration, either by reverting the
change
method or by running the down
method. If
you need to undo several migrations you can provide a STEP
parameter:
$ bin/rake db:rollback STEP=3
will revert the last 3 migrations.
The db:migrate:redo
task is a shortcut for doing a rollback
and then migrating back up again. As with the db:rollback
task, you can use the STEP
parameter if you need to go more
than one version back, for example:
$ bin/rake db:migrate:redo STEP=3
Neither of these Rake tasks do anything you could not do with
db:migrate
. They are simply more convenient, since you do not
need to explicitly specify the version to migrate to.
Setup the Database¶ ↑
The rake db:setup
task will create the database, load the
schema and initialize it with the seed data.
Resetting the Database¶ ↑
The rake db:reset
task will drop the database and set it up
again. This is functionally equivalent to rake db:drop
db:setup
.
NOTE: This is not the same as running all the migrations. It will only use
the contents of the current schema.rb
file. If a migration
can't be rolled back, rake db:reset
may not help you. To
find out more about dumping the schema see Schema Dumping and You section.
Running Specific Migrations¶ ↑
If you need to run a specific migration up or down, the
db:migrate:up
and db:migrate:down
tasks will do
that. Just specify the appropriate version and the corresponding migration
will have its change
, up
or down
method invoked, for example:
$ bin/rake db:migrate:up VERSION=20080906120000
will run the<PHONE_NUMBER>0000 migration by running the change
method (or the up
method). This task will first check whether
the migration is already performed and will do nothing if Active Record
believes that it has already been run.
Running Migrations in Different Environments¶ ↑
By default running rake db:migrate
will run in the
development
environment. To run migrations against another
environment you can specify it using the RAILS_ENV
environment
variable while running the command. For example to run migrations against
the test
environment you could run:
$ bin/rake db:migrate RAILS_ENV=test
Changing the Output of Running Migrations¶ ↑
By default migrations tell you exactly what they're doing and how long it took. A migration creating a table and adding an index might produce output like this
== CreateProducts: migrating ================================================= -- create_table(:products) -> 0.0028s == CreateProducts: migrated (0.0028s) ========================================
Several methods are provided in migrations that allow you to control all this:
| Method | Purpose | ——————– | ——- | suppress_messages | Takes a block as an argument and suppresses any output generated by the block. | say | Takes a message argument and outputs it as is. A second boolean argument can be passed to specify whether to indent or not. | say_with_time | Outputs text along with how long it took to run its block. If the block returns an integer it assumes it is the number of rows affected.
For example, this migration:
class CreateProducts < ActiveRecord::Migration def change suppress_messages do create_table :products do |t| t.string :name t.text :description t.timestamps null: false end end say "Created a table" suppress_messages {add_index :products, :name} say "and an index!", true say_with_time 'Waiting for a while' do sleep 10 250 end end end
generates the following output
== CreateProducts: migrating ================================================= -- Created a table -> and an index! -- Waiting for a while -> 10.0013s -> 250 rows == CreateProducts: migrated (10.0054s) =======================================
If you want Active Record to not output anything, then running rake
db:migrate VERBOSE=false
will suppress all output.
Changing Existing Migrations¶ ↑
Occasionally you will make a mistake when writing a migration. If you have
already run the migration then you cannot just edit the migration and run
the migration again: Rails thinks it has already run the migration and so
will do nothing when you run rake db:migrate
. You must
rollback the migration (for example with rake db:rollback
),
edit your migration and then run rake db:migrate
to run the
corrected version.
In general, editing existing migrations is not a good idea. You will be creating extra work for yourself and your co-workers and cause major headaches if the existing version of the migration has already been run on production machines. Instead, you should write a new migration that performs the changes you require. Editing a freshly generated migration that has not yet been committed to source control (or, more generally, which has not been propagated beyond your development machine) is relatively harmless.
The revert
method can be helpful when writing a new migration
to undo previous migrations in whole or in part (see Reverting Previous Migrations
above).
Schema Dumping and You¶ ↑
What are Schema Files for?¶ ↑
Migrations, mighty as they may be, are not the authoritative source for
your database schema. That role falls to either db/schema.rb
or an SQL file which Active Record generates by examining the database.
They are not designed to be edited, they just represent the current state
of the database.
There is no need (and it is error prone) to deploy a new instance of an app by replaying the entire migration history. It is much simpler and faster to just load into the database a description of the current schema.
For example, this is how the test database is created: the current
development database is dumped (either to db/schema.rb
or
db/structure.sql
) and then loaded into the test database.
Schema files are also useful if you want a quick look at what attributes an Active Record object has. This information is not in the model's code and is frequently spread across several migrations, but the information is nicely summed up in the schema file. The annotate_models gem automatically adds and updates comments at the top of each model summarizing the schema if you desire that functionality.
Types of Schema Dumps¶ ↑
There are two ways to dump the schema. This is set in
config/application.rb
by the
config.active_record.schema_format
setting, which may be
either :sql
or :ruby
.
If :ruby
is selected then the schema is stored in
db/schema.rb
. If you look at this file you'll find that it
looks an awful lot like one very big migration:
ActiveRecord::Schema.define(version:<PHONE_NUMBER>1750) do create_table "authors", force: true do |t| t.string "name" t.datetime "created_at" t.datetime "updated_at" end create_table "products", force: true do |t| t.string "name" t.text "description" t.datetime "created_at" t.datetime "updated_at" t.string "part_number" end end
In many ways this is exactly what it is. This file is created by inspecting
the database and expressing its structure using create_table
,
add_index
, and so on. Because this is database-independent, it
could be loaded into any database that Active Record supports. This could
be very useful if you were to distribute an application that is able to run
against multiple databases.
There is however a trade-off: db/schema.rb
cannot express
database specific items such as triggers, or stored procedures. While in a
migration you can execute custom SQL statements, the schema dumper cannot
reconstitute those statements from the database. If you are using features
like this, then you should set the schema format to :sql
.
Instead of using Active Record's schema dumper, the database's
structure will be dumped using a tool specific to the database (via the
db:structure:dump
Rake task) into
db/structure.sql
. For example, for PostgreSQL, the
pg_dump
utility is used. For MySQL, this file will contain the
output of SHOW CREATE TABLE
for the various tables.
Loading these schemas is simply a question of executing the SQL statements
they contain. By definition, this will create a perfect copy of the
database's structure. Using the :sql
schema format will,
however, prevent loading the schema into a RDBMS other than the one used to
create it.
Schema Dumps and Source Control¶ ↑
Because schema dumps are the authoritative source for your database schema, it is strongly recommended that you check them into source control.
db/schema.rb
contains the current version number of the
database. This ensures conflicts are going to happen in the case of a merge
where both branches touched the schema. When that happens, solve conflicts
manually, keeping the highest version number of the two.
Active Record and Referential Integrity¶ ↑
The Active Record way claims that intelligence belongs in your models, not in the database. As such, features such as triggers or constraints, which push some of that intelligence back into the database, are not heavily used.
Validations such as validates :foreign_key, uniqueness: true
are one way in which models can enforce data integrity. The
:dependent
option on associations allows models to
automatically destroy child objects when the parent is destroyed. Like
anything which operates at the application level, these cannot guarantee
referential integrity and so some people augment them with foreign key constraints in the database.
Although Active Record does not provide all the tools for working directly
with such features, the execute
method can be used to execute
arbitrary SQL.
Migrations and Seed Data¶ ↑
Some people use migrations to add data to the database:
class AddInitialProducts < ActiveRecord::Migration def up 5.times do |i| Product.create(name: "Product ##{i}", description: "A product.") end end def down Product.delete_all end end
However, Rails has a 'seeds' feature that should be used for
seeding a database with initial data. It's a really simple feature:
just fill up db/seeds.rb
with some Ruby code, and run
rake db:seed
:
5.times do |i| Product.create(name: "Product ##{i}", description: "A product.") end
This is generally a much cleaner way to set up the database of a blank application.


This parameter is the number of 100ms intervals that must pass (when the voltage limit is NOT exceeded) before the associated battery current limit is restored by 10% of the maximum limit.
This timer can be adjusted to avoid oscillations in the current limits. A value of 0 indicates that the associated limit (CCL / DCL) will immediately be restored to normal once the voltage maximum is no longer being exceeded.
This is also the timer that is used to restore limits to their original values following a voltage sensor failure condition (see: Voltage Fault Derate Timer).
| < Voltage Derate Limit to Zero Timer | Voltage Failure Derate Timer > |


Kansas Association of Biology Teachers asked P2T students to redesign their organization's website and perform optimizations to speed up user experience. Students went above and beyond, updating their website for the modern web.
Students worked alongside the Kauffman Foundation's IT team to help pick a vendor for a new phone system and provided documentation for the hundreds of employees transitioning to the new system. Students were able to soak up the experience of making changes for large organizations.
Learn MoreMoKan Goodwill provided students with training in cutting-edge technology to help train an AI in order to detect defects in donated clothing. Students worked with a robotics company to help create the dataset used to train the AI.
PREP-KC’s Pathways to Technology program is designed to give Kansas City’s urban high school students a jumpstart on a postsecondary degree and a career in technology-related fields. The students’ experiences in the Pathway to Technology program provides an immersive classroom experience and better prepares them for college and careers by integrating career-readiness experiences and college course work into the high school program of study. Data from PREP-KC’s Academies indicate an average postsecondary enrollment rate of 74% for Academy graduates. This exceeds the national averages for low-income (52%) and middle-income (65%) students.
This is a year-long class starting at Cerner in the fall paired with an internship in the spring. During the internships, students are placed on teams alongside professionals working on real-world projects. Students, in the fall, work on a micro-credential through Google that is dual credit eligible for a potential of 12 hours of college credit. All participating students will be provided transportation to Cerner for class and internship experiences. Participating students will receive a full scholarship for the dual credit course and a full scholarship for any dual credit classes outside the program.
Are you a part of a company or small business that would like to help mentor or provide a client project for high school students interested in technology?


Space Invaders - The Clone Wars
Top Score:
Level:
Score:
Mission Completed!
You won!
Next Level
Restart
Mission Failed
GAME OVER ☹
Restart


obm-nav(1) Openbox Pipe Menu obm-nav(1) NAME obm-nav - a pipe-menu for openbox SYNTAX obm-nav <root> <filer> <terminal> DESCRIPTION Obm-moz is a pipe menu for openbox. It recursively builds a menu to nav‐ igate directories. More information about pipe-menus can be found on http://icculus.org/openbox/index.php/Openbox:Pipemenus EXAMPLES obm-nav /home/bull rox xterm AUTHORS obm-dir was written by Manuel Colmenero<EMAIL_ADDRESS>as part of obmenu. This manual page was originally written for the Debian GNU/Linux system by Davide Truffa<EMAIL_ADDRESS>SEE ALSO obmenu(1), obm-dir(1), obm-moz(1), obm-xdg(1), openbox(1) Davide Truffa 1.0 obm-nav(1)


wound healing nanoparticles antibacterial bacterial Moreover, properties growth Wound cell silver order {border-style chronic px;} #ffffff;} AgNPs diabetic tissue wounds chitosan oxide Staphylococcus addition, dressings used antimicrobial skin Wang high (e.g., However, active closure release Int. Sci. aureus cells dressing employed factor matrix vitro vivo bacteria characterized granulation increased low surface A.M. Zhang associated delivery dermal enhanced fibroblast human nanomaterials nanoparticles, reduced result, synthesis therapy toxicity AuNPs Biol. Holban Mater. Nanoparticles Popa ZnONPs angiogenesis application collagen cytotoxicity described gold px; re-epithelialization scaffolds studies study treatment {font-family Bacterial Healing Med. Nanomed. Pseudomonas Silver activity capable cellular clinical combined containing demonstrated different effect endothelial example, font-size gene hydrogel increasing inducing infection materials microbial novel observed potential promote represent results DNA Grumezescu M.M. antibiotics applied bFGF burns calcium colonization commonly composed control development double; exhibit expression factors formation gel leading membrane networks oxygen particles process products proliferation proper re-epithelialization, recent topical using wounds, wounds. Appl. Chen Figure Khan M.C. M.I. Mihai Nanomaterials S.K. Yang aeruginosa anti-inflammatory biopolymer border-color border-width cells, compared composite compound compounds cytokine determine developed environment, epidermal exhibited extracellular factors, fibroblasts groups healing, improved infected infections involved keratinocytes local moist oxidative polymeric presented produce production properties, reactive reduction reported role situ size solid; stimulate studied substances trials types wound, wound-healing zinc {font-style {font-weight (i.e., ./IJN.S ./s--- ACS Adv. Chitosan Diabetic Effect Gao Gold Lin Materials Microbiol. Nanotechnology Nitric TGFβ- Therefore, Unknown [], accelerated accelerating achieve agents aid applications bioactive biofilm biological bold capacity causing cerium characteristics coatings courier; deeper directly effects effects, efficacy em; ensuring environment especially external fact form highly immune important inflammation, integrated ions keratinocyte keratinocytes, levels light loaded main metal model mouse natural negative pathogens peptide phase, plant porous potent pro-inflammatory provide pt;} recombinant reduces release, released research resistance scarring showed silver, site stimulated stimulates superior synthesis, therapeutic treating vivo,


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Gamification is the process of applying game mechanics to any non-game activity.
The application has:
The Good News: You can use a lot of the same development skills you already have to build gamification.
The Bad News: Things like page load, performance speed and well-structured code become much more important.
To Contact Me: Email | Twitter | LinkedIn | Medium | DEV
Actionable Gamification: Beyond Points, Badges, and Leaderboards
Technically Wrong: Sexist Apps, Biased Algorithms, and Other Threats of Toxic Tech


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Jeon So Mi wraps up college entrance exam for next year
by germainejJeon So Mi has wrapped up the college entrance exam for the entering class of 2020!
On November 14, reporters caught Jeon So Mi attending her college entrance exam at Garak High School in Seoul. She expressed after the exam, "I took the college entrance exam to the best of my ability today. I was very nervous, but I felt the students' passion and gained strength too."
The singer continued, "The lunch was so good that I ate in a hurry and got indigestion, but even despite that, it was a deeply meaningful college entrance exam. I'm so thankful and think it's so meaningful that I get to take the exam after my final year of high school. It was an honor to take the test beside them and see their passion. All the college entrance exam students really worked hard."
Stay tuned for updates on Jeon So Mi!


// Gloria Anholt<EMAIL_ADDRESS>// https://www.github.com/GloriaAnholt/event-emitter
/**
* @class EventEmitter
* @classdesc
* A simple factory which returns a Pub/Sub style Event Emitter in ES6.
* Subscription is managed via the addListener (reusable events) or the once methods to add a new listener
* to a given event name. Individual handlers are removed via the returned unsubscribe function, or by
* using the removeListener method (both remove the first matching handler function for that event type).
* Handlers registered by the "once" method can only be removed using their returned unsubscribe function.
* The removeAllListeners method clears all registered listeners for the given event name, but does not
* remove the event name from the registered events.
* Events are emitted using the emit method, and the handlers are called in the order they were registered
* for a given event name, minus any listeners that were removed before an emit event occurred.
* Emitting an event for an emptied event name does not throw an error.
*/
class EventEmitter {
/**
* @constructor
*/
constructor() {
this._events = {};
}
/**
* Adds a new listener for the event based on the string token eventName, or creates the event
* type if not in dict of events. Throws a TypeError if not passed a callback function.
* @method
* @param {string} eventName - A string token for event type, by name
* @param {function} cb - The callback function to invoke when a matching event is emitted
*/
addListener(eventName, cb) {
if ( !this._events[eventName] ) {
this._events[eventName] = [];
}
if ( typeof cb === 'function' ) {
this._events[eventName].push(cb);
// return them their unsubscribe function
return () => {
this.removeListener(eventName, cb);
}
}
else throw new TypeError('Error: addlistener(eventName, cb) - callbacks must be of type function');
}
/**
* Adds a one-time-use listener for the eventName, removed from listeners after first matching event
* is emitted. Cannot be removed by removeListener - must use the returned unsubscribe function.
* Throws a TypeError if not passed a function as a handler.
* @method
* @param {string} eventName - A string token for event type, by name
* @param {function} cb - The callback function to invoke once when a matching event is emitted
*/
once(eventName, cb) {
if ( typeof cb === 'function' ) {
const wrapper = (...args) => {
this.removeListener(eventName, wrapper);
cb.call(this, ...args);
}
this.addListener(eventName, wrapper);
}
else throw new TypeError('Error: addlistener(eventName, cb) - callbacks must be of type function');
}
/**
* When an event is emitted matching a registered event type, invokes each listener's callback function
* in the order they were registered, passing along whatever arguments the emit method recieved.
* Throws a ReferenceError if the event name has never been registered - passes silently if no handlers
* are currently registered for a given event name.
* @method
* @param {string} eventName - A string token for event type, by name
* @param {*} args - Takes any number of any type of arguments and passes them to the callback functions
*/
emit(eventName, ...args) {
if ( this._events[eventName] ) {
this._events[eventName].map(fn => {
fn.call(this, ...args);
})
}
else throw new ReferenceError('Error: eventName not found');
}
/**
* Removes the first matching listener for the event based on the string token eventName.
* Returns true if a matching callback is found, throws a ReferenceError if no events are
* registered by the event name or no matching listeners are found.
* @method
* @param {string} eventName - A string token for event type, by name
* @param {function} cb - The callback function to remove from the registered listeners
*/
removeListener(eventName, cb) {
if ( this._events[eventName] ) {
let index = this._events[eventName].indexOf(cb);
if (index > -1) {
this._events[eventName].splice(index, 1);
return true;
}
else throw new ReferenceError('Error: cb not registered for eventName');
}
else throw new ReferenceError('Error: eventName not found');
}
/**
* Removes all matching listeners for the event based on the string token eventName. Returns the
* EventEmitter if a matching event name is found, throws a ReferenceError if no events are
* registered by the event name.
* Note: does not remove the event type key from the dict, simply clears all listeners.
* @method
* @param {string} eventName - A string token for event type, by name, to remove all events.
*/
removeAllListeners(eventName) {
if ( this._events[eventName] ) {
this._events[eventName].length = 0;
// Like node, returns a reference to itself to allow for chaining calls
return EventEmitter;
}
else throw new ReferenceError('Error: eventName not found');
}
}
module.exports = EventEmitter;


#include <CPipelineState.h>
Public Member Functions | |
| CPipelineState (CWindow *Window) | |
| ~CPipelineState () | |
| void | SetShader (SharedPointer< IShader > Shader) |
| void | SetVertexBuffer (uint const Index, SharedPointer< IVertexBuffer > VertexBuffer) |
| void | SetIndexBuffer (SharedPointer< IIndexBuffer > IndexBuffer) |
| void | SetUniform (string const &Name, SharedPointer< IUniform > Uniform) |
| void | SetTexture (string const &Name, SharedPointer< ITexture > Texture) |
| void | SetPrimitiveType (EPrimitiveType const PrimitiveType) |
| void | SetFeatureEnabled (EDrawFeature const Feature, bool const Enabled) |
| void | SetPolygonOffsetAmount (float const Amount) |
| void | SetBlendMode (EBlendMode const BlendMode) |
| void | OfferUniform (string const &Name, SharedPointer< IUniform > Uniform) |
| void | OfferTexture (string const &Name, SharedPointer< ITexture > Texture) |
| void | IgnoreUniform (string const &Name) |
| set< string > | GetUnboundUniforms () const |
| void | Load () |
| Public Member Functions inherited from ion::Graphics::IPipelineState | |
| virtual | ~IPipelineState () |
Public Attributes | |
| CWindow * | Window = nullptr |
| SharedPointer< CShader > | Shader |
| vector< SharedPointer< CVertexBuffer > > | VertexBuffers |
| SharedPointer< CIndexBuffer > | IndexBuffer |
| uint | VertexArrayHandle = 0 |
| bool | Loaded = false |
| map< string, SharedPointer< IUniform const > > | Uniforms |
| map< uint, SharedPointer< IUniform const > > | BoundUniforms |
| map< string, SharedPointer< ITexture const > > | Textures |
| map< uint, SharedPointer< ITexture const > > | BoundTextures |
| set< string > | UnboundUniforms |
| set< string > | UnboundAttributes |
| bool | DrawWireframe = false |
| bool | CullFront = false |
| bool | CullBack = false |
| bool | DisableDepthTest = false |
| bool | DisableDepthWrite = false |
| bool | PolygonOffset = false |
| float | PolygonOffsetAmount = 1.f |
| EBlendMode | BlendMode = EBlendMode::None |
| uint | PrimitiveType |
| ion::Graphics::GL::CPipelineState::CPipelineState | ( | CWindow * | Window | ) |
| ion::Graphics::GL::CPipelineState::~CPipelineState | ( | ) |
|
virtual |
Implements ion::Graphics::IPipelineState.
|
virtual |
Implements ion::Graphics::IPipelineState.
|
virtual |
Implements ion::Graphics::IPipelineState.
|
virtual |
Implements ion::Graphics::IPipelineState.
|
virtual |
Implements ion::Graphics::IPipelineState.
|
virtual |
Implements ion::Graphics::IPipelineState.
|
virtual |
Implements ion::Graphics::IPipelineState.
|
virtual |
Implements ion::Graphics::IPipelineState.
|
virtual |
Implements ion::Graphics::IPipelineState.
|
virtual |
Implements ion::Graphics::IPipelineState.
|
virtual |
Implements ion::Graphics::IPipelineState.
|
virtual |
Implements ion::Graphics::IPipelineState.
|
virtual |
Implements ion::Graphics::IPipelineState.
|
virtual |
Implements ion::Graphics::IPipelineState.
| EBlendMode ion::Graphics::GL::CPipelineState::BlendMode = EBlendMode::None |
| map<uint, SharedPointer<ITexture const> > ion::Graphics::GL::CPipelineState::BoundTextures |
| map<uint, SharedPointer<IUniform const> > ion::Graphics::GL::CPipelineState::BoundUniforms |
| bool ion::Graphics::GL::CPipelineState::CullBack = false |
| bool ion::Graphics::GL::CPipelineState::CullFront = false |
| bool ion::Graphics::GL::CPipelineState::DisableDepthTest = false |
| bool ion::Graphics::GL::CPipelineState::DisableDepthWrite = false |
| bool ion::Graphics::GL::CPipelineState::DrawWireframe = false |
| SharedPointer<CIndexBuffer> ion::Graphics::GL::CPipelineState::IndexBuffer |
| bool ion::Graphics::GL::CPipelineState::Loaded = false |
| bool ion::Graphics::GL::CPipelineState::PolygonOffset = false |
| float ion::Graphics::GL::CPipelineState::PolygonOffsetAmount = 1.f |
| uint ion::Graphics::GL::CPipelineState::PrimitiveType |
| SharedPointer<CShader> ion::Graphics::GL::CPipelineState::Shader |
| map<string, SharedPointer<ITexture const> > ion::Graphics::GL::CPipelineState::Textures |
| set<string> ion::Graphics::GL::CPipelineState::UnboundAttributes |
| set<string> ion::Graphics::GL::CPipelineState::UnboundUniforms |
| map<string, SharedPointer<IUniform const> > ion::Graphics::GL::CPipelineState::Uniforms |
| uint ion::Graphics::GL::CPipelineState::VertexArrayHandle = 0 |
| vector<SharedPointer<CVertexBuffer> > ion::Graphics::GL::CPipelineState::VertexBuffers |
| CWindow* ion::Graphics::GL::CPipelineState::Window = nullptr |
Generated on Sun May 6 2018 for ionEngine v0.4.5


To change your password just follow this link:
<% $uri | h %>
This link will remain valid for 24 hours.
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Pong 3D
First to 8 wins!
Move with arrows or WASD, pause with spacebar
Made by Santiago Rojas Herrera
Github


Gateway
BOT
30-Nov-19 10:33 AM
[dscrd-hush] <gogo> That's a cool name i could use on some of my profile names @Privatoshi
[dscrd-hush] <gogo> Mr Zaddr
[dscrd-hush] <Privatoshi> Lol haha
[dscrd-hush] <Privatoshi> You really have to use them though
[dscrd-hush] <Privatoshi> And tell others about them and what they do
[dscrd-hush] <gogo> @Privatoshi yes. First my telegram
[dscrd-hush] <gogo> Then make poster
[dscrd-hush] <Privatoshi> We will call you..
Mr. Zaddr or Zaddrinho
[dscrd-hush] <gogo> Zarddrinho ......like dribble past everyone
[dscrd-hush] <webworker01 - MinerPond.com> !tip nomention
[dscrd-hush] <gogo> I wouldn't do that
[dscrd-hush] <Privatoshi> Please use #tipbot_general
[dscrd-hush] <Privatoshi> Zaddrinho, yes
[dscrd-hush] <Privatoshi> Like Ronaldinho but Zaddrinho
[dscrd-hush] <Privatoshi> You use telegram?
[dscrd-hush] <gogo> Yes I got telegram @Privatoshi
[dscrd-hush] <Privatoshi> In any crypto groups?
[dscrd-hush] <gogo> Just a couple man
[dscrd-hush] <gogo> Wanna invite me to something superb @Privatoshi ?
[dscrd-hush] <Privatoshi> Haha I might soon
[dscrd-hush] <Privatoshi> Not better than this discord channel
[dscrd-hush] <Privatoshi> But something good for telegram
[dscrd-hush] <Privatoshi> Are they good channels that you're in?
[dscrd-hush] <gogo> @blockmenace is my telegram name @Privatoshi
[dscrd-hush] <Privatoshi> @gogo I sent u a message
[dscrd-hush] <gogo> @Privatoshi okay cool. Will checkout and reply in a short while. I use a diff device for telegram
[dscrd-hush] <Privatoshi> Np. What's going on?
[dscrd-hush] <Privatoshi> How's SilentDragonLite?
[dscrd-hush] <Privatoshi> SilentDragon Android?
[dscrd-hush] <gogo> Nothing much. Oh sdl is superb. So is sda
[dscrd-hush] <Privatoshi> I really like SDLite
[dscrd-hush] <gogo> When I log off my pc it disconnects though on sda
[dscrd-hush] <Privatoshi> We have a SilentDragonSuperLite, in the works.
[dscrd-hush] <gogo> Okay great news. Can SDA operate without to SDL. Perhaps after syncing @Privatoshi
[dscrd-hush] <Privatoshi> Did you do it using the wormhole?
[dscrd-hush] <Privatoshi> On SDA in Settings, don't check
[dscrd-hush] <Privatoshi> SDLite, check below the QR Code
[dscrd-hush] <Privatoshi> It'll change the QR Code, so change it first.
[dscrd-hush] <Privatoshi> Then scan it, with your camera.
[dscrd-hush] <Privatoshi> See what it does
[dscrd-hush] <gogo> Yes I did that yesterday. I'm my near my pc at the moment
[dscrd-hush] <Privatoshi> If it does nothing, click reconnect
[dscrd-hush] <gogo> I scanned it and it connected to my sda
[dscrd-hush] <Privatoshi> And?
[dscrd-hush] <gogo> When I switched off my pc sda didn't work again
[dscrd-hush] <Privatoshi> You need to keep it running.
[dscrd-hush] <Privatoshi> Because it is using the wormhole, to connect the wallets, on both devices.
[dscrd-hush] <gogo> Okay o get it
[dscrd-hush] <Privatoshi> You can delete that image.
[dscrd-hush] <Privatoshi> If you click the 3 dots, is the box checked?
[dscrd-hush] <gogo> I can only do that later buddy
[dscrd-hush] <gogo> I'm still at from home
[dscrd-hush] <Privatoshi> No problem.
I'll DM you the info.
SDA - Box unchecked
SDL - Box under QR Code Checked
(edited)
[dscrd-hush] <gogo> @Privatoshi cool
[dscrd-hush] <Privatoshi> If you ever have any errors, it's really really helpful if you report them. Whatever you can say, is helpful.
[dscrd-hush] <gogo> Okay buddy . Always on the lookout
[dscrd-hush] <Privatoshi> Like if your wallet crashes and it leaves an error message
[dscrd-hush] <Privatoshi> Just copy and paste the error message, in #developers
[dscrd-hush] <Privatoshi> And say, I was doing this, and this happened
[dscrd-hush] <gogo> No prob
[dscrd-hush] <Privatoshi> Duke & Denio & all of those guys, are very appreciative of stuff like that
[dscrd-hush] <gogo> And they are doing a great job. Very good at what they do hey
[dscrd-hush] <Privatoshi> That is crazy. Just with SD, 13,277 additions to the code...
[dscrd-hush] <gogo> Crazy work. Pretty busy
[dscrd-hush] <Privatoshi> We happen to have one of the best devs, in all of crypto.. We also have a great team and a great community
(edited)


--- layout: post status: publish published: true title: We have a few empty spots on our bus trip author: display_name: Corey Fineran login: Corey email<EMAIL_ADDRESS>url: '' author_login: Corey author_email<EMAIL_ADDRESS>wordpress_id: 3126 wordpress_url: http://ivyenvy.com/?p=3126 date: '2010-08-03 06:23:13 +0000' date_gmt: '2010-08-03 11:23:13 +0000' categories: - Ivy Envy - Events tags: - Ivy Envy Bus Trip comments: [] ---
Ivy Envy is chartering a bus from the Quad Cities to Wrigley Field on August 21st for the Braves vs Cubs game. We have a few spots that have opened up. Tickets are $80 and that includes the bus ride up and your ticket to the game. Email me at<EMAIL_ADDRESS>if you want any of these spots.


Motorcycles
The most fun you can have on wheels.
U.S.M.C.
In service as a United States Marine.
The cup is totally full, half is water and half is air!
I am currently a master's candidate and plan on continuing towards my doctorate in Computer Science, so I am officially now a geek too!


Git is not something you learn in a day.
Git is something you learn over the course of your career.
define( 'DISALLOW_FILE_EDIT', true );
Virtualized development environment…
…a computer inside a computer.
You can vagrant destroy
,
but you can never vagrant forget
.
Varying Vagrant Vagrants:
Quickest way to get up and running with a
bower install npm install brew install yum
Wait, that’s wrong…I always forget which order the package managers are supposed to be in.
— I Am Devloper (@iamdevloper) May 16, 2014
Automates the process of installing, updating, and removing software.
Retrieves code from a central repository.
Manages front-end libraries:
Don't use it for libraries that come bundled with WordPress.
"A standardized, organized, object-oriented foundation for building high-quality WordPress Plugins."
Like _s for themes, provides a scaffold for easily getting started building WordPress plugins.
Very simple plugin for showing you which template file WordPress is using to generate the page you're on.
Installs a "Debug" section in your admin bar with diagnostic information.
Makes sure your theme meets the standards required to be added to the WordPress theme repository. Makes sure your using WordPress best practices in building your theme.
Especially useful when working with responsive images, takes the images in your media library and creates different sized versions of them.
Exports your database as a MySQL data dump, does a find and replace on URLs and file paths, then allows you to save it to your computer.
Starting a basic website in 2014:
1. Install Node
2. Install Bower
3. Pick CSS framework
4. Pick responsive approach
…
47. Write some HTML
— I Am Devloper (@iamdevloper) October 2, 2014
(Same applies in 2015.)
Responsive WordPress Theming
http://responsivewptheming.com
WCUS2015


BLOW OUT A film review by Vince Deehan Copyright 1996 Vince Deehan
Written and Directed by Brian De Palma Cast: John Travolta, Nancy Allen, John Lithgow, Dennis Franz.
(Warning- review contains a few minor spoilers).
With all the resurgent interest in John Travolta lately, post PULP FICTION, it was with great interest that I checked out one of his earlier films which has received some praise recently. Quentin Tarantino has said of BLOW OUT that it contains one of Travolta's best ever performances.
BLOW OUT is a thriller set in Philadelphia where Jack Terry (John Travolta) works as a sound effects man on low budget horror movies. Whilst out one night recording the sound of the wind for one of his films, he is witness to a car crashing through a bridge and into the river below. Jack jumps into the river where he saves a young lady in the car from certain drowning. He is unable to save the man in the car who has already died. It turns out that the dead man is a governor and a presidential candidate and the young lady is a girl he has picked up, Sally (Nancy Allen). The tyres of the car have been blown out and the whole accident is presented to the public as being an accident. Jack knows otherwise as he has taped the whole incident on audiotape and can distinctly hear two bangs, one of which he feels sure is the gunshot of an assassin and the other bang being the fatal tyre blowout.
The stage is set for a fight by Jack to prove that there has been a cover up, where the authorities are covering up an assassination. A photographer , Manny (Dennis Franz), who just happened to be at the scene of the time, has also taken a roll of pictures of the accident. When Manny sells his pictures to a magazine, Jack uses his film skills to link his sound to Manny's still photos. When the two are put together Jack has both visual and audio evidence of the gunshot. Armed with this evidence he goes to the police who at first seem uninterested but eventually agree to see what Jack has got. Unfortunately, the assassin Burke (John Lithgow) wipes the tapes clean before the police can see and hear Jack's evidence. As the film progresses we discover the real reason why Manny was so fortuitously present at the accident and the real reason why Sally was in the governor's car.
BLOW OUT is a taut thriller with some great moments of humour. A running gag throughout the film shows the trouble that Jack's boss has in trying to find a good screamer to use in dubbing one of his horror flicks. The film has dated quite badly though, with some rather dodgy and jarring music which gives the film a rather hammy feel in places that I feel sure was not intentional. The dialogue is not too great either but is adequate enough. I guess I am so used to hearing John Travolta spouting Tarantino's snappy dialogue in PULP FICTION that anything else pales in comparison.
John Lithgow turns in a gripping performance as the assassin ,which is very effective and chilling. Dennis Franz, currently in NYPD Blue, is great as the slimy photographer Manny. Although it has to be said that Franz really hasn't changed very much in the proceeding 15 years, except he had more hair then ! Nancy Allen's performance improves as the film goes on, but is pretty woeful at the start where she fails to match Travolta's convincing acting.
John Travolta turns in a great performance, his charisma carries the whole film - so what else is new ? His early scenes where we see him working as a sound effects man are terrific. Mainly because there is so much humour when we see him and his boss having trouble with the scream track on their horror film. As the film goes on and the pressure on Jack intensifies, Travolta effectively conveys the tension and stress he is under. The best scene though in the film is the scene near the beginning where we see Jack on a bridge in the late evening recording the sounds around him. There is hardly any dialogue at all in this scene, but the way John Travolta moves around with the microphone you never doubt his believability as a sound recordist.
All in all, BLOW OUT is an effective thriller which, although not essential viewing, is well worth a look if you get the chance.
Review Written on Thur 7th March 1996 by Vince Deehan<EMAIL_ADDRESS>The review above was posted to the
rec.arts.movies.reviews newsgroup (de.rec.film.kritiken for German reviews).
The Internet Movie Database accepts no responsibility for the contents of the
review and has no editorial control. Unless stated otherwise, the copyright
belongs to the author.
Please direct comments/criticisms of the review to relevant newsgroups.
Broken URLs inthe reviews are the responsibility of the author.
The formatting of the review is likely to differ from the original due
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Related links: index of all rec.arts.movies.reviews reviews


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About
Hi, there. I’m Abhilash John Philip. I’m a Product Management Professional. I am currently working as a Product Manager at Housing.com. My interests range from entrepreneurship, technology to public policy. I am also interested in design, reading and education.


{% include head.html %}
{% include nav.html %} {% include header.html %} {% include about.html %} {% include info.html %} {% include cta.html %} {% include gallery.html %} {% include reference.html %} {% include scripts.html %}


@import com.gu.janus.model.{AwsAccountAccess, JanusData}
@import com.gu.googleauth.UserIdentity
@(accountAccesses: List[AwsAccountAccess], user: UserIdentity, janusData: JanusData)(implicit req: RequestHeader, assetsFinder: AssetsFinder)
@main("Admin", Some(user), janusData) {
As an administrator you have full access to all AWS accounts.
Please use this with care and try to let the team know what
you are doing to their account.
Janus access is logged and visible to all users.
@fragments.awsAccounts(accountAccesses, allowFavs = false)
@fragments.multiSelectHero()
}


Contact Us
Please feel free to contact us at Straight to the Point Archery with any questions you may have.
Address
Phone Number
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+1<PHONE_NUMBER>
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Sat. 11 am - 6 pm
Closed: Sunday


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iFruit 5A - Battery Life
Document Id: KBDOC-00299
Created: 2013-10-02
Updated: 2013-10-03
iFruit 5A Battery Life
Just like any other electric device, the iFruit 5A must be charged. If it seems to be discharging quickly, you are using the phone too much.
Charging the phone
- Rub a baloon on your head and discharge the charge on the phone.
- Tie to kite during a thunderstorm.
- Use the Raiden Lightning move to charge the phone instantaneously.
Tags: tablet, battery life


Your bird age according to your age is :
But according to the average life span of a bird, it will live upto an another


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| Package | Description |
|---|---|
| org.apache.edgent.analytics.sensors |
Analytics focused on handling sensor data.
|
| org.apache.edgent.connectors.file |
File stream connector.
|
| org.apache.edgent.function |
Functional interfaces for lambda expressions.
|
| org.apache.edgent.graph |
Low-level graph building API.
|
| org.apache.edgent.graph.spi | |
| org.apache.edgent.oplet.functional |
Oplets that process tuples using functions.
|
| org.apache.edgent.streamscope |
Stream Oscilloscope - package for instrumenting streams to capture tuples.
|
| org.apache.edgent.topology |
Functional api to build a streaming topology.
|
| org.apache.edgent.topology.plumbing |
Plumbing for a streaming topology.
|
| org.apache.edgent.topology.spi.graph |
| Modifier and Type | Class and Description |
|---|---|
class |
Deadtime<T>
Deadtime
Predicate . |
class |
Range<T extends java.lang.Comparable<?>>
A generic immutable range of values and a way to
check a value for containment in the range.
|
| Modifier and Type | Method and Description |
|---|---|
static <T,V> TStream<T> |
Filters.deadband(TStream<T> stream,
Function<T,V> value,
Predicate<V> inBand)
Deadband filter.
|
static <T,V> TStream<T> |
Filters.deadband(TStream<T> stream,
Function<T,V> value,
Predicate<V> inBand,
long maximumSuppression,
java.util.concurrent.TimeUnit unit)
Deadband filter with maximum suppression time.
|
| Modifier and Type | Method and Description |
|---|---|
Predicate<T> |
FileWriterCycleConfig.getTuplePredicate()
Get the tuple predicate configuration value.
|
Predicate<T> |
FileWriterFlushConfig.getTuplePredicate()
Get the tuple predicate configuration value.
|
| Modifier and Type | Method and Description |
|---|---|
static <T> FileWriterFlushConfig<T> |
FileWriterFlushConfig.newConfig(int cntTuples,
long periodMsec,
Predicate<T> tuplePredicate)
Create a new configuration.
|
static <T> FileWriterCycleConfig<T> |
FileWriterCycleConfig.newConfig(long fileSize,
int cntTuples,
long periodMsec,
Predicate<T> tuplePredicate)
Create a new configuration.
|
static <T> FileWriterCycleConfig<T> |
FileWriterCycleConfig.newPredicateBasedConfig(Predicate<T> tuplePredicate)
same as
newConfig(0, 0, 0, tuplePredicate) |
static <T> FileWriterFlushConfig<T> |
FileWriterFlushConfig.newPredicateBasedConfig(Predicate<T> tuplePredicate)
same as
newConfig(0, 0, tuplePredicate) |
| Modifier and Type | Method and Description |
|---|---|
static <T> Predicate<T> |
Functions.alwaysFalse()
A Predicate that is always false
|
static <T> Predicate<T> |
Functions.alwaysTrue()
A Predicate that is always true
|
| Modifier and Type | Method and Description |
|---|---|
void |
Graph.peekAll(Supplier<? extends Peek<?>> supplier,
Predicate<Vertex<?,?,?>> select)
Insert Peek oplets returned by the specified
Supplier into
the outputs of all of the oplets which satisfy the specified
Predicate and where the output's Connector.isConnected()
is true. |
| Modifier and Type | Method and Description |
|---|---|
void |
AbstractGraph.peekAll(Supplier<? extends Peek<?>> supplier,
Predicate<Vertex<?,?,?>> select) |
| Constructor and Description |
|---|
Filter(Predicate<T> filter) |
| Modifier and Type | Method and Description |
|---|---|
void |
StreamScope.TriggerManager.setCaptureByPredicate(Predicate<T> predicate)
Capture a tuple if the
predicate test of the tuple returns true. |
void |
StreamScope.TriggerManager.setPauseOn(Predicate<T> predicate)
Set a pause-on predicate.
|
| Modifier and Type | Method and Description |
|---|---|
TStream<T> |
TStream.filter(Predicate<T> predicate)
Declare a new stream that filters tuples from this stream.
|
| Modifier and Type | Class and Description |
|---|---|
class |
Valve<T>
A generic "valve"
Predicate . |
| Modifier and Type | Method and Description |
|---|---|
TStream<T> |
ConnectorStream.filter(Predicate<T> predicate) |
Copyright © 2017 The Apache Software Foundation. All Rights Reserved - 4744f56-20170226-1707


stateVector.mean
Take a mean over dimensions of variables in a state vector
Syntax
Description
Updates the settings for means for the listed variables. If the first input is -1, applies the settings to all variables currently in the state vector.
obj = obj.mean(variables, stateDimension)
Takes a mean over the indicated state dimension. The mean is taken over all elements of the dimension that are included in the state vector (i.e. over all state indices for the dimension).
Takes a mean over the indicated ensemble dimension. The mean is implemented using the specified mean indices. The mean for the dimension is calculated over elements located by applying the mean indices to particular elements along the dimension. If the dimension does not have a sequence, the mean indices are applied to the reference element. If the dimension has a sequence, applies the mean indices to each individual sequence element.
Takes a mean over multiple dimesions. If every listed dimension is a state dimension, you do not need to provide the third input (the mean indices). Specify mean indices if the dimensions list contains any ensemble dimensions. Use an empty array for the indices of any state dimensions.
Specify how to treat NaN elements along each dimension. Default is to include NaN values.
obj = obj.mean(variables, dimensions, “none”)
Discards any previously-specified options for taking a mean for the listed dimensions. No mean will be taken over the dimensions when building state vector ensembles.
obj = obj.mean(variables, dimensions, “unweighted”)
Discards any previously-specified weights for use in a weighted mean for the listed dimensions. The state vector will still take a mean over the listed dimensions, but the mean will be unweighted. This option is only valid for dimensions that take either a mean or a weighted mean. The dimensions list should not include dimensions that do not take a mean at all.
Input Arguments
v
variableNames
dimensions
indices
The mean indices show how to locate elements used in a mean over an ensemble dimension. If the dimension does not use a sequence, the mean indices are added to the reference element of each ensemble member. The mean is then taken over the resulting data elements. If the dimension uses a sequence, a mean will be taken over each sequence element. First, sequence indices are added to the reference element to give a set of sequence elements. Then, the mean indices are added to each sequence element and a mean is taken over each set of resulting data elements.
If a single dimension is listed, and the dimension is a state dimension, you do not need to provide mean indices as an input. If the single dimension is an ensemble dimension, you may provide the mean indices directly as a vector, rather than in a scalar cell. However, the scalar cell syntax is also permitted.
omitnan
[true|”omitnan”]: Omit NaN values when taking means
[false|”includenan” (default)]: Include NaN values in means.


Dev Academy blog Home Culture Sprint1 Sprint2 Sprint3 Sprint4 Sprint5 Technical Sprint1 Sprint2 Sprint3 Sprint4 Sprint5 Welcome to my blog! This blog will document my journey through Enspiral Dev Academy's foundations course. Culture Identity, Values, and Strenths and Strengths Explorations Learning Reflections Emotional Intelligence Neuroplasticity and Growth Mindset The End of the Beginning Reflection Technical Stories and legends Margin, border & ... padding?! HTML, CSS & JavaScript basics Approach to Problem Solving Carnival Games


You: I'm so sorry that happened. Would you accept my apology, for those who did that to you?
You: (If appropriate:) Have you ever tried to love somebody and made a mess out of it? You had good intentions, but everything went wrong. Do you think there was a possibility in your friend's desire for you to know Jesus that she just went about it the wrong way?
You: Jesus would not approve of rude behavior either. By the way, what is your understanding of who Jesus is?


Manager
class Manager
Class Manager manages categories. A category is basically a directory inside of the /media folder.
Methods
__construct(Filesystem $Filesystem, CategoryPaths $CategoryPaths)
Create a new category manager
bool
storeNewCategory($input)
Stores the category in the filesystem
bool
destroyCategory($input)
Removes the category path
renameCategory($path, $newName)
Renames a category path
Details
at line 29
__construct(Filesystem $Filesystem, CategoryPaths $CategoryPaths)
Create a new category manager
at line 43
bool
storeNewCategory($input)
Stores the category in the filesystem
at line 67
bool
destroyCategory($input)
Removes the category path
at line 85
renameCategory($path, $newName)
Renames a category path


MySQL AUDIT Plugin is a MySQL plugin from McAfee providing audit capabilities for MySQL, designed with an emphasis on security and audit requirements. The plugin may be used as a stand alone audit solution or configured to feed data to external monitoring tools.


Simply upload your data and get it segmented. Segmented data will be your automated purchase funnel. This is your targetting list.
Your data is stored in our servers with autobuckup mode. Large data is no problem.
Perform mailing right through service. Segmented customers list will leave you just to use right words on right time!
The more recently a customer has made a purchase with a company, the more likely he or she will continue to keep the business and brand in mind for subsequent purchases. Compared with customers who have not bought from the business in months or even longer periods, the likelihood of engaging in future transactions with recent customers is arguably higher.
The frequency of a customer’s transactions may be affected by factors such as the type of product, the price point for the purchase, and the need for replenishment or replacement. If the purchase cycle can be predicted, for example when a customer needs to buy new groceries, marketing efforts could be directed towards reminding them to visit the business when items such as eggs or milk have been depleted.
Monetary value stems from the lucrativeness of expenditures the customer makes with the business during their transactions. A natural inclination is to put more emphasis on encouraging customers who spend the most money to continue to do so. While this can produce a better return on investment in marketing and customer service, it also runs the risk of alienating customers who have been consistent but have not spent as much with each transaction.
If you don't have your own domain. We also provide you with our mailing system. This one is dedicated to work with large amount of data.
Access to statistical analysis of your customers activity data.You may get familiar with each of your customer and give them individual opportunities. As well as creating the group of most loyal clients for special awards.
Personalized automatic mailings do not spam, but inform the client about the prices and bonuses relevant to them for those goods and at the moment when it is relevant
You may get familiar with each of your customer and give them individual opportunities. As well as creating the group of most loyal clients for special awards.


--- layout: post status: publish published: true title: "小猴子是主角！" author: Leask author_login: leask author_email<EMAIL_ADDRESS>author_url: https://leaskh.com wordpress_id: 691 wordpress_url: http://leaskh.wordpress.com/2005/09/06/%e5%b0%8f%e7%8c%b4%e5%ad%90%e6%98%af%e4%b8%bb%e8%a7%92%ef%bc%81 date: '2005-09-06 03:13:55 +0800' date_gmt: '2005-09-06 03:13:55 +0800' categories: - Life tags: [] comments: [] ---


layout: true class: animated fadeIn middle numbers .footnote[ `PSA` - N. Dubray - ENSIIE - 2023 - [:book:](../index.html) ] --- # Monitoring .hcenter.w40[![](images/progress_bar.png)] .hcenter[:arrow_right: How to know what a program is doing without perturbing it ?] --- # Monitoring - Overview ## What to monitor ? * some quantities (progress bar...) * large data (live visualization...) ## How to monitor ? * read-only or read/write ? * delayed or real-time ? ## 1. Access the internal state of the program :+: get tiny or large data :+: get **real-time information** :warning: **may disturb** the program (performances, flow, race conditions...) :+: **may allow** to modify the program's flow (read/write) :warning: is **only available during a run** ## 2. Let the program publish partial results :+: get tiny or large data :warning: get **delayed information** :warning: **may disturb** the program (performances) :+: **does not allow** to modify the program's flow (read-only) :+: is **available during and after a run** --- # Monitoring - Internal state :arrow_right: The program should run with or without a connected monitor **with the same performances**. :warning: The program will have to spend resources to treat monitoring requests (RPC). ## 1. RPC on a named pipe :arrow_right: Create a **thread** which receives requests and posts data through a **named pipe**. :warning: The monitoring program must have access to the named pipe. :warning: **At most one** monitoring client at any time. :warning: Need to define an API. ## 2. RPC through a network socket :arrow_right: Create a **thread** which receives requests and posts data through a **network socket**. :warning: The monitoring program must have access to the socket. :warning: Possible **multiple** monitoring clients at any time. :warning: Need to define an API. ## 3. `xmlrpclib` `Python` module ([webpage](https://docs.python.org/2/library/xmlrpclib.html)) :arrow_right: **Standard** RPC module for `Python`. :warning: Python only. ## 4. `rfoo` `Python` module ([webpage](https://code.google.com/archive/p/rfoo/)) :arrow_right: Simple and fast RPC module for `Python`. :warning: Python only. :bulb: For **interactive use**: `rconsole`. --- # Monitoring - Internal state ## Limitations :warning: To avoid race conditions, `locks` can be used between threads, but :arrow_right: this may affect the calculating thread's performances. .vspace[] :warning: On most supercomputers, * **users can not connect to the nodes through SSH** (no named pipe), * **users can not connect to the nodes through HTTP** (no `xmlrpclib` / `rfoo`), * **users can not connect to the nodes through TCP** (no network socket). .hcenter.shadow.w30[![](images/rage.png)] --- # Monitoring - Partial results ## Store a single document ? :warning: There is a possible **race condition** (read while write). :warning: **No access to calculation history** or **document growing bigger and bigger**. :arrow_right: Store partial results in documents with an increasing index. ## Data validity ? :warning: Documents may be truncated, empty, etc... :arrow_right: If needed, check document integrity with **checksums**. ## Shared filesystem or DBMS ? :+: A shared filesystem will **always be available** on a supercomputer. :warning: The shared directory must be **synced** between the calculating node and the monitoring node. :warning: A DBMS might **not be reachable** from the nodes of a supercomputer. :+: **A DBMS enforces data integrity** (no manual checksum needed). :+: A shared filesystem **should have good performances and good reliability**. :+: A DBMS **should have good performances and good reliability**. :warning: A DBMS might impose **technical constraints** (use of a schema, types of data, etc...). :arrow_right: For storing **huge** data quantities, prefer **distributed datafile formats** (`MPI-IO`, `HDF5`...). ## Polling frequency ? :arrow_right: Adjust the polling frequency to the data production frequency, or :arrow_right: **Do not use polling** (wait for user request). --- # Monitoring - Partial results ## Possible solutions * Save `JSON` files in a **shared directory**. * Save `pickle` files in a **shared directory**. * Save `JSON` files in a **gridFS** instance. * Save `pickle` files in **gridFS** instance. * Save documents in a **mongoDB** instance. * Save documents in a **distributed datafile format**. * Use the supercomputer's prefered storage solution (**ask IT staff**). * ... (be creative ?) ## Ideal solution :arrow_right: **There is no ideal solution**. ## Adapt your data persistence model to: * the **available** data storing technologies, * the **expected volume** of your produced data, * the **expected rate** of your data production, * the possibility for monitoring tools to **reach the stored data**, * the desired data storing **properties** (performances, reliability, capacity, latency, etc...) * etc... --- # Monitoring - Conclusions ## Best-case scenario :arrow_right: If possible, prefer storing **partial results** and use them to **monitor** the progress of a calculation. :arrow_right: At the end of a calculation, keep **all or some** of the partial results to construct the **final result**. :arrow_right: Use a reasonable polling frequency for the monitoring tool. :warning: If the saving of a partial result is not **atomic**, use **checksums** to validate data. ## Worst-case scenario :arrow_right: If the calculating and the monitoring nodes can not communicate, no monitoring is possible. --- # Bonus .hcenter.w60[![](images/present.png)] --- class: top # Bonus - restart mechanism ## Bonus 1: use partial results to continue a calculation -- If there is **enough information** in a partial result to **continue** a calculation, :arrow_right: allow the code to restart **from the most recent valid partial result**. .vspace[] :warning: Be sure to check if the input quantities have not changed before restarting (**use checksums**). .vspace[] If partial and final results **share the same format and location**, :arrow_right: the monitoring and the post-processing can be done by **the exact same code** -- ## Bonus 2: use partial results to start and continue a calculation -- :arrow_right: The **very first input file** can also be constructed as a **partial result**. -- ## Possible workflow for the project .mermaid.hcenter[ graph LR A(User) --JSON--> B B(Generator) -- partial --> D C(Solver) -- partial --> D D(MongoDB) -- partial --> E E(Monitor) -- vtk --> F(Paraview) D -- partial --> C style D fill:#090 ] -- :bulb: Store in every partial result for `\(t \ne 0\)` the checksum of the partial result for `\(t=0\)`.


Sustainability Exploration (per country)
Positive Sustainability Margin
Negative Sustainability Margin
No Data


| {$address.address_id} |
{$address.address_name} |
{$address.address_phone} |
{$address.address_province}{$address.address_city}
{$address.address_region}
{$address.address_detail} |
{if condition='$address.is_default eq 1'}
默认地址
{else/}
设为默认
{/if}
|
删除 |
{/volist}


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Scottish Labour turmoil over probe into 'Israel is like a child abuser' candidate
Senior Labour figures are unhappy about the probe into Kate Ramsden.
by Paul Hutcheon, https://www.dailyrecord.co.uk/authors/paul-hutcheon/The chair of Scottish Labour has criticised an internal party investigation into a former candidate who quit after comparing Israel to a child abuser.
Cara Hilton said the probe into Kate Ramsden appeared to suggest it was a “problem” to support Palestine.
Leaked emails also show that Simon Macfarlane, senior trade unionist who is a member of his party’s governing body, claimed his union supported Ramsden.
Scottish Labour’s election campaign suffered a twin blow last week after two candidates dropped out.
Frances Hoole was removed in Edinburgh South West after sharing a social media post about SNP opponent Joanna Cherry.
Ramsden, who was contesting Gordon, then withdrew over a blog post she wrote:
“To me, the Israeli state is like an abused child who becomes an abusive adult.”
She added: “Like child abuse, it has to stop...As we intervene with child abusers, the international community needs to intervene with Israel.”
Scottish Labour intended to re-interview her, but Ramsden quit and issued a fulsome apology:
“I can see that many Jewish people have been hurt by my words. That was never my intention and I apologise unreservedly.
“I reflected on it and decided to delete the post. This was my decision. I was not directed to do so.”
However, it can be revealed that figures on the Scottish party’s Executive privately criticised the internal probe which pulled together Ramsden’s comments on Israel and Palestine.
Macfarlane, a regional organiser for Unison, informed colleagues:
“Is this the normal format of a compliance report? Is there any contact made with Kate in its compilation? Is there no recommendations? I find the report very unsatisfactory.”
He added: “Kate is a Social Worker (Children’s Rights Officer). It is understandable she would write in emotive terms about this. UNISON will support Kate one of our NEC members.”
Hilton, who is also the Labour candidate for Dunfermline and West Fife, responded:
“I’d echo Simon’s concerns about this report into Kate Ramsden.
“It appears to suggest that any support for the Palestinian cause is a problem in a potential candidate.”
Tory MSP Maurice Golden said: “Scotland’s Jewish community will be appalled at these exchanges. It’s right that the candidate for Gordon quit and, if Ms Hilton finds that so objectionable, perhaps she should consider her position too.”
The row comes after Scottish Labour removed another candidate, Bill Curran, earlier this month.
Curran wrote that he stood with controversial MP Chris Williamson, who was suspended after claiming Labour had been “too apologetic” over the row about anti-Jewish sentiment in the party.
A Scottish Labour spokesperson said: "We don't comment on leaks."


The Wizarding Network of Harry Potter
November 05, 2014I spent part of my summer as an intern at the Center for Open Science. I wanted to become more familiar with JavaScript (I never used it before the internship), so I carved out my own project to create a better network visualization of users on the Open Science Framework. This way, researchers could see who is working with whom, and on what projects.
While that code is still being integrated into the CoS infrastructure, I wanted to write a post applying/extending my code to other datasets. After some thought, I figured creating a network of Harry Potter character connections would be pretty neat. While I found this, unfortunately I was looking for a dataset that contained more than 65 characters. Looks like a job for web scraping!
First, I scraped a list of 178 characters taken from wikipedia. These characters also have their own pages on a Harry Potter wiki site, and the majority of these names were identical to what needed to be added to the URL to access the page. A quick code check revealed only a few mistakes to be corrected, but luckily not much manual labor was required in this step.
Next, I made the assumption that on a given character’s page, any name that was hyperlinked in the main text share some “logical connection” relevant in the Harry Potter universe. Of course, this assumption may not be completely tenable, but the results this came up with seemed reasonable. Thus, each character page was scraped for an image to use on a custom slider I created, as well as a list of connections to the other characters on my list.
And that was it! All data scraping and cleaning took place in R, with the network layout being calculated using igraph. The actual network was visualized using the sigma.js JavaScript library, while the navigation tools and custom slider was created in plain ol’ HTML/JavaScript.
Both Hadley Wickham’s new R web scraping tool rvest and the awesome SelectorGadget actually made this web scraping task much easier than I thought it would be. Note that rvest is not yet available on CRAN, but you can get the development version off his GitHub using devtools. One of my next posts will outline how to use rvest in more detail.
Check out the finished product on my data visualization page, and check out my GitHub if you want to see the web scraping or JavaScript code. I also included two more networks with simple datasets in case anyone is interested in messing around with sigma.js.


Run your first GPU Program
Let's try to run our first kernel SAXPY. If you see the method clealy, there are 3 parameters: float array of "x", float array of "y" and scalar float "a"
- So lets define our 3 parameter using .NET standard declaration:
//Create variable a, b and r
Array x = new float[] { 1, 2, 3, 4, 5, 6, 7, 8, 9 };
Array Y = new float[] { 9, 8, 7, 6, 5, 4, 3, 2, 1 };
float a = 0.5f;
- Create an instance of OpenCL compiler. You can see all the available devices supported by Open CL
//Create instance of OpenCL compiler
var compiler = new OpenCLCompiler();
//Get the available device list
Console.WriteLine("\nList Devices----");
foreach (var item in compiler.Devices)
{
Console.WriteLine(item);
}
If more than one device is found, then the system supports OpenCL. Now a days almost all the hardware and GPU cards supports OpenCL. You can go through the link for the list of supported hardwar list: https://www.khronos.org/conformance/adopters/conformant-products/opencl
- For now lets select one device which can be done by specifiying the device id like below:
//Select a default device
compiler.UseDevice(0);
- Compile the kernel class with the selected device. You can invoke the Compile method for other kernel class as well. With the Kernels property you can see all the defined functions
//Compile the sample kernel
compiler.CompileKernel(typeof(SampleKernels));
//See all the kernel methods
Console.WriteLine("\nList Kernels----");
foreach (var item in compiler.Kernels)
{
Console.WriteLine(item);
}
- Get the execution engine for the compiler and invoke the function.
//Get the execution engine
var exec = compiler.GetExec<float>();
//Execuete SAXPY kernel method
exec.SAXPY(x, y, a);
//Print the result
Console.WriteLine("\nResult----");
for (int i = 0; i < y.Length; i++)
{
Console.Write(y.GetValue(i) + " ");
}


| Disclaimer/Copyright |
This program is 100% free, which means that you can copy it, use it as in many machines as you like, and make as many backup copies as you like! But please, if you're going to copy it, copy the original setup file, so the integrity of the program is maintained.
Anyway, if you like this program and wish to make a donation in order to help me maintain it free, you're welcome to do so.
There's a secure registration that you can use to make your donations:
Click here for more information.The disclaimer part is very short... I'm not responsible if the program (PopUp Killer) behaves in some way different from expected and because of that you loose some data, or some of your data gets damaged or... or... or...


（happī）natsu tsuita yo ハルジオン。 oki te oki te !
Natsu! We've arrived at Hargeon!   I-Is he alright?


Three seriously injured after car crashes into house and sets on fire
Three people have suffered severe injuries when their car crashed into a house and drove up the side of it.
The car became engulfed in flames as it got stuck upside down, with the back end of the car almost touching the roof of the home.
The incident occurred at around 1.30am on Saturday on Barvas Corner, on the Isle of Lewis.
A blue Vauxhall Zafira crashed into a house, which resulted in both being set on fire, before emergency services and police were scrambled to the scene.
They successfully rescued the occupants of the car – three men aged 22, 32 and 36 – and a 61-year-old woman who was in the house.
The driver and two passengers were taken to Western Isles Hospital for treatment to serious injuries.
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A 32-year-old man was arrested in connection with road traffic offences.The road is down to single-lane traffic while police investigate.
Sergeant Donald Sinclair, of Stornoway’s Church Street station, said: ‘Our inquiries into the circumstances of the crash are ongoing and I am appealing for anyone who saw the crash or who saw a blue Vauxhall Zafira being driven on the A857 before 1.30am to come forward.
‘I’m particularly keen to speak to anyone who may have dashcam footage which could help with our inquiries.’
Got a story for Metro.co.uk?
Get in touch with our news team by emailing us at<EMAIL_ADDRESS>For more stories like this, check our news page.


Work together in a text document. Write code, essays or anything else together, without using any outside resources.
Working together means communicating together. Chat about your work on the same page so you can stay distraction free.
Collaborate virtually without the hassle of moving around. All your work is saved on the cloud so you never have to worry about lost work.


Hello I'm a full stack developer based in Houston, Texas. As a recent graduate of the DigitalCrafts coding bootcamp I have a passion for coding.
On this project I used... GitHubIf you would like a peek under the hood.
On this project I used... GitHub. If you would like a peek under the hood.
On this project I used... GitHub. If you'd like a peek under the hood.


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