Python Objects
工厂函数
就是指那些内建函数都是类对象，当调用他们时，实际上是创建了一个类实例。
#####变量定义
-
显示声明
C: 变量声明必须位于代码块最开始，且在任何其他语句之前。
C++、Java: 允许”随时随地”声明变量，不过仍必须在变量被使用前声明变量的名字和类型。 -
隐式
Python: 变量在第一次被赋值时自动声明。Python 是一种解释性语言，在创建（也就是赋值时），解释器会根据语法和右侧的操作数来决定新对象的类型。在创建对象后，一个该对象的应用会被赋值给左侧的变量。
内存分配
为变量分配内存时，是在借用系统资源，在用完之后，应该释放借用的系统资源。Python 解释器承担了此任务。
引用计数
Python 使用引用计数技术来保持追踪内存中的对象。当对象被创建时，便创建一个引用计数（每个对象各有多少个引用），当对象不在需要时（也即引用计数变为0时），它被垃圾回收。
dir() and del
>>> print dir.__doc__
dir([object]) -> list of strings
If called without an argument, return the names in the current scope.
Else, return an alphabetized list of names comprising (some of) the attributes
of the given object, and of attributes reachable from it.
If the object supplies a method named __dir__, it will be used; otherwise
the default dir() logic is used and returns:
for a module object: the module's attributes.
for a class object: its attributes, and recursively the attributes
of its bases.
for any other object: its attributes, its class's attributes, and
recursively the attributes of its class's base classes.
>>> dir()
['__builtins__', '__doc__', '__name__', '__package__']
>>> import sys
>>> dir()
['__builtins__', '__doc__', '__name__', '__package__', 'sys']
>>> del sys
>>> dir()
['__builtins__', '__doc__', '__name__', '__package__']
Reduce the Number of Lookups
To actually get the integer type object, the interpreter has to look up the types name first, and then within that module’s dictionary, find IntType. By using from-import, you can take away one lookup:
from types import IntType
if type(num) == IntType ...
Numbers
Type Categorized by the Update Model
| Update Model Category | Python Types That Fit Category |
|---|---|
| Mutable | List, dictionaries |
| Immutable | Numbers, strings, tuples |
Rather than referring to the original objects, new objects with the new values were allocated and (re)assigned to the original varibale names, and the old objects were garbage-collected. One can confirm this by using the __id()__ BIF(build-in function) to compare object identities before and after such assignments.
>>> dir()
['__builtins__', '__doc__', '__name__', '__package__', 'foo', 'types', 'x']
>>> x
1
>>> id(x)
140457926481800
>>> x += 1
>>> id(x)
140457926481776
# a and b referring the same ...
>>> a = 10
>>> b = 10
>>> a is b
True
>>> id(a), id(b)
(140309388376016,<PHONE_NUMBER>76016)
>>> e = 10.0
>>> f = 10.0
>>> e is f
False
>>> id(e), id(f)
(140309388384736,<PHONE_NUMBER>84760)
>>> s = 0.0
>>> for i in range(10):
... s += 0.1
...
>>> s
0.9999999999999999
>>> print s
1.0
Notice how for each change, the ID for the list remained the same.
>>> list
['this', 5, 'list']
>>> id(list)
4303214496
>>> list[0] = 'list'
>>> list
['list', 5, 'list']
>>> id(list)
4303214496
>>>
Factory functions, just means that those objects are now classes, and when you “call” them, you are just creating an instance of that class.
Compare
- int()： chops off the decimal point and everything after. 直接截去小数部分（返回值为整型）
- floor()： rounds you to the next smaller integer, i.e., the next integer moving in a negative direction(toward the left on the number line). 得到最接近原数但小于原数的整型。
-
round(): (round zero digits) rounds you to the nearest integer period. 得到最接近原数的整型。
>>> print hex.__doc__ hex(number) -> string Return the hexadecimal representation of an integer or long integer. >>> print oct.__doc__ oct(number) -> string Return the octal representation of an integer or long integer. >>> >>> hex(255) '0xff' >>> oct(255) '0377' >>> print chr.__doc__ chr(i) -> character Return a string of one character with ordinal i; 0 <= i < 256. >>> print ord.__doc__ ord(c) -> integer Return the integer ordinal of a one-character string. >>> chr(99) 'c' >>> ord('d') 100
Sequences: strings, Lists, and Tuples
Sequence type all share the same access model: ordered set with sequentially indexed offsets to get to each element. Multiple elements may be selected by using the slice operators.
Repetition
The repetition operator is useful when consecutive copies of sequence elements are desired. The syntax for using the repetition operator is as follows:
#sequence * copies_int
>>> '*' * 40
'****************************************'
>>> 'what!' * 4
'what!what!what!what!'
The number of copies, copies_int, must be an integer. As with the concatenation operator, the object returned is newly allocated to hold the contents of the multiply replicated objects.
Format Operator (%)
Special Features of Lists
** Cerating Other Data Structures Using Lists **
- Stack: A last-in-first-out (LILO) data structure.
- Queue: A first-in-first-out (FIFO) data structure, which works like a bank teller line. The first person in line is the first one served. New elements join by being “enqueued” at the end of the line, and elements are removed from the front by being “dequeued.”
- Tuples: Tuples are another container type extremely similar in nature to lists. The only visible difference between tuples and lists is that tuples use parentheses and lists use square brackets. and Tuples are immutable, Because of this, tuples can do something that lists cannot do…be a dictionary key. Tuples are also the default when dealing with a group of objects.
Sidle-Element Tuples: to place a trailing comma (,) after the first element to indicate that this is a tuple and not a grouping.
>>> type( ('xyz') )
<type 'str'>
>>> type( ('xyz',) )
<type 'tuple'>
Dictionary Keys
Immutable objects have values that cannot be changed. That means that they will always hash to the same value. This is the requirement for an object being valid dictionary key. As we will find out in the next chapter, keys must be washable objects, and tuples meet that criteria. Lists are not eligible.
Lists & Tuples
list() and tuple() are functions that allow you to create a tuple from a list and vice versa( vice versa means ‘反之亦然’). When you have a tuple and want a list because you need to update its objects, the list() function suddenly becomes your best buddy. When you have a list and want to pass it into a function, perhaps API, and you do not want anyone to mess with the data, the tuple() function comes in quite useful.
>>> tuple([1, 2, 3])
(1, 2, 3)
>>> list((4, 5, 6))
[4, 5, 6]
Size
a = tuple(range(1000))
b = list(range(1000))
a.__sizeof__() # 8024
b.__sizeof__() # 9088
Due to the smaller size of a tuple operation with it a bit faster but not that much to mention about until you have a huge amount of elements. Permitted operations
b = [1,2]
b[0] = 3 # [3, 2]
a = (1,2)
a[0] = 3 # Error
sxdcfm, that also mean that you can't delete element or sort tuple. At the same time you could add new element to both list and tuple with the only difference that you will change id of the tuple by adding element
a = (1,2)
b = [1,2]
id(a) #<PHONE_NUMBER>16520
id(b) # 748527696
a += (3,) # (1, 2, 3)
b += [3] # [1, 2, 3]
id(a) #<PHONE_NUMBER>78160
id(b) # 748527696
Usage
You can’t use list as a dictionary identifier
a = (1,2)
b = [1,2]
c = {a: 1} # OK
c = {b: 1} # Error
Copying python objects and Shallow and Deep Copies
A shallow copy is where only references are copied…no new objects are made! If you also want copies of the objects(including recursively if you have container objects in containers), you will need to learn about deep copies.
The shallow and deep copy operations that we just described are found in the copy module. There are really only two functions to use from this module: copy() creates shallow copy, and deepcopy() creates a deep copy.
Append
>>> import string
>>> string.letters
'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'
>>> string.digits
'0123456789'
>>> import keyword
>>> keyword.kwlist
['and', 'as', 'assert', 'break', 'class', 'continue', 'def', 'del', 'elif', 'else', 'except', 'exec', 'finally', 'for', 'from', 'global', 'if', 'import', 'in', 'is', 'lambda', 'not', 'or', 'pass', 'print', 'raise', 'return', 'try', 'while', 'with', 'yield']
>>>
Mapping and Set Types
Dictionary may be created using a very convenient built-in-method for creating a “default” dictionary whose elements all have the same value(default to None if not given), fromkeys():
>>> ddict = {'x': 'hello', 'y': 'dict'}
>>> fdict = {}.fromkeys(('m', 'n'), 8)
>>> edict = {}.fromkeys(('foo', 'bar'))
>>> print ddict, fdict, edict
{'y': 'dict', 'x': 'hello'} {'m': 8, 'n': 8} {'foo': None, 'bar': None}
Core TIps
Because dict() is now a type and factory function, overriding it may cause you headaches and potential bugs.  So be careful. Do NOT use variables named after built-in types like: dict, list, file, bool, str, input, Or len!
How dictionaries are compared
Functions and Functional Programming
Non-keyword Variable Arguments (Tuple)
A **TypeError exception is generated whenever an incorrect number of arguments is given in the function invocation. By adding a variable argument list variable at the end, we can handle the situation when more than enough arguments are passed to the function because all the extra(non-keyword) ones will be added to the variable argument tuple.
>>> def tupleVariable(arg1, arg2='defaultB', *theRest):
... 'display regular args and non-keyword variable args'
... print 'format arg 1: ', arg1
... print 'format arg 2: ', arg2
... for eachXtrArg in theRest:
... print 'another arg: ', eachXtrArg
...
>>> tupleVariable('abc')
format arg 1: abc
format arg 2: defaultB
>>> tupleVariable(23, 4.56)
format arg 1: 23
format arg 2: 4.56
>>> tupleVariable('abc', 123, 'xyz', 456.789)
format arg 1: abc
format arg 2: 123
another arg: xyz
another arg: 456.789
Keyword Variable Arguments (Dictionary)
In the case where we have a variable number or extra set of keyword arguments, these are placed into a dictionary where the “Keyword” argument variable names are the keys, and the arguments are their corresponding values. A double asterisk (**) is used.
>>> def dictVarArgs(arg1, arg2='defaultB', **theRest):
... 'display 2 regular args and keyword variable args'
... print 'format arg1: ', arg1
... print 'format arg2: ', arg2
... for eachXtrArg in theRest.keys():
... print 'Xtr arg %s: %s' % (eachXtrArg, str(theRest[eachXtrArg]))
...
>>> dictVarArgs(1220, 740.3, c='grail')
format arg1: 1220
format arg2: 740.3
Xtr arg c: grail
>>> dictVarArgs(arg2='tales', c='grail', d=123, arg1='mystery')
format arg1: mystery
format arg2: tales
Xtr arg c: grail
Xtr arg d: 123
>>> dictVarArgs('one', d=10, c='grail', e='zoo', men=(123, 'fuck'))
format arg1: one
format arg2: defaultB
Xtr arg c: grail
Xtr arg men: (123, 'fuck')
Xtr arg e: zoo
Xtr arg d: 10
Modules
####Search Path
>>> import sys
>>> sys.path
['', '/Library/Python/2.7/site-packages/virtualenv-15.0.2-py2.7.egg', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python27.zip', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7']
>>> type(sys.path)
<type 'list'>
Bearing in mind that is just a list, we can definitely take Liberty with it and modify it at our leisure. If you know of a module you want to import, yet its directory is not in the search path, by all means use the list’s append() method to add it to the path, like so:
>>> import os
>>> os.getcwd()
'/Users/xing'
>>> sys.path.append(os.getcwd())
>>> sys.path
['', '/Library/Python/2.7/site-packages/virtualenv-15.0.2-py2.7.egg', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python27.zip', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7', '/Users/xing']
####Import Modules
It is recommended that all imports happen at the top of Python modules. Furthermore, imports should follow this ordering:
- Python Standard Library modules
- Python third party modules
- Application-specific modules
Separate these groups with an empty line between the imports of these types of modules. This helps ensure that modules are imported in a consistent manner and helps minimize the number of import statements required in each of the modules.
Instance Attributes
Being able to create an instance attribute “on-the-fly” is one of the great features of Python classes, initially (but gently) shocking those coming from C++ or Java in which all attributes must be explicitly defined/ declared first.
Python is not only dynamically typed but also allows for such dynamic creation of object attributes during run-time. It is a feature that once used may be difficult to live without. Of course, we should mention to the reader that one much be cautious when creating such attributes.
One pitfall is when such attributes are created in conditional clauses: if you attempt to access such an attribute later on in your code, that attribute may not exist if the flow had not entered that conditional suite. The moral of the story is that Python gives you a new feature you were not used to before, but if you use it, you need to be more careful, too.
####Functions versus methods
Methods are basically functions but tied to a specific class object type. They are defined as part of a class and are executed as part of an instance of that class.


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| void | OnDialogSequenceFinished_7 () |
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| void | OnDialogSequenceFinished_6 () |
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| void | OnDialogSequenceFinished_5 () |
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| void | Set_Round1 (EMissionObjectiveSetEvent ObjectiveSetEvent) |
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| void | Obj_Rounds (EMissionObjectiveEvent ObjectiveEvent, int ObjectiveCount) |
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| void | MCE_Update_RoundCount (class UObject *Context) |
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| void | Obj_INVIS_Assemble_2 (EMissionObjectiveEvent ObjectiveEvent, int ObjectiveCount) |
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| void | Obj_INVIS_Assemble_3 (EMissionObjectiveEvent ObjectiveEvent, int ObjectiveCount) |
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| void | Obj_INVIS_Assemble_4 (EMissionObjectiveEvent ObjectiveEvent, int ObjectiveCount) |
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| void | Obj_INVIS_Assemble_5 (EMissionObjectiveEvent ObjectiveEvent, int ObjectiveCount) |
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| void | Obj_INVIS_Assemble_6 (EMissionObjectiveEvent ObjectiveEvent, int ObjectiveCount) |
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| void | Obj_StartRound_2 (EMissionObjectiveEvent ObjectiveEvent, int ObjectiveCount) |
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| void | Obj_StartRound_3 (EMissionObjectiveEvent ObjectiveEvent, int ObjectiveCount) |
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| void | Obj_StartRound_4 (EMissionObjectiveEvent ObjectiveEvent, int ObjectiveCount) |
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| void | Obj_StartRound_5 (EMissionObjectiveEvent ObjectiveEvent, int ObjectiveCount) |
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| void | Obj_StartRound_6 (EMissionObjectiveEvent ObjectiveEvent, int ObjectiveCount) |
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| void | Obj_CompleteWave_2 (EMissionObjectiveEvent ObjectiveEvent, int ObjectiveCount) |
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| void | MCE_Update_CompleteWave_2 (class UObject *Context) |
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| void | Obj_CompleteWave_3 (EMissionObjectiveEvent ObjectiveEvent, int ObjectiveCount) |
| |
| void | Set_Round2 (EMissionObjectiveSetEvent ObjectiveSetEvent) |
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| void | _Obj_Rounds_Objective__PROXY () |
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| void | Set_Round3 (EMissionObjectiveSetEvent ObjectiveSetEvent) |
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| void | Set_Round4 (EMissionObjectiveSetEvent ObjectiveSetEvent) |
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| void | Set_Round5 (EMissionObjectiveSetEvent ObjectiveSetEvent) |
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| void | _Obj_Rounds_Objective__PROXY_1 () |
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| void | _Obj_Rounds_Objective__PROXY_2 () |
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| void | _Obj_Rounds_Objective__PROXY_3 () |
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| void | Obj_CompleteWave_4 (EMissionObjectiveEvent ObjectiveEvent, int ObjectiveCount) |
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| void | MCE_Update_CompleteWave_4 (class UObject *Context) |
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| void | MCE_Update_CompleteWave_3 (class UObject *Context) |
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| void | Obj_CompleteWave_5 (EMissionObjectiveEvent ObjectiveEvent, int ObjectiveCount) |
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| void | MCE_Update_CompleteWave_5 (class UObject *Context) |
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| void | Obj_CompleteWave_6 (EMissionObjectiveEvent ObjectiveEvent, int ObjectiveCount) |
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| void | MCE_Update_CompleteWave_6 (class UObject *Context) |
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| void | Set_TurnIn (EMissionObjectiveSetEvent ObjectiveSetEvent) |
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| void | Obj_TurnIn (EMissionObjectiveEvent ObjectiveEvent, int ObjectiveCount) |
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| void | MCE_Update_TurnIn (class UObject *Context) |
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| void | MCE_PlayersAssembled (class UObject *Context) |
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| void | MCE_PlayersNotAssembled (class UObject *Context) |
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| void | MCE_SwitchUsed (class UObject *Context) |
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| void | MCE_AllPlayersDied (class UObject *Context) |
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| void | Obj_OptionalObjective_Round1 (EMissionObjectiveEvent ObjectiveEvent, int ObjectiveCount) |
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| void | Obj_OptionalObjective_Round2 (EMissionObjectiveEvent ObjectiveEvent, int ObjectiveCount) |
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| void | Obj_OptionalObjective_Round3 (EMissionObjectiveEvent ObjectiveEvent, int ObjectiveCount) |
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| void | Obj_OptionalObjective_Round4 (EMissionObjectiveEvent ObjectiveEvent, int ObjectiveCount) |
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| void | Obj_OptionalObjective_Round5 (EMissionObjectiveEvent ObjectiveEvent, int ObjectiveCount) |
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| void | MCE_PlayerDied (class UObject *Context) |
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| void | MissionKickoff () |
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| void | MissionActiveLoad () |
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| void | MissionActive () |
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| void | Obj_INVIS_PlayersDiedinRound (EMissionObjectiveEvent ObjectiveEvent, int ObjectiveCount) |
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| void | MCE_PlayersAllDiedInRound (class UObject *Context) |
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| void | _Obj_INVIS_PlayersDiedinRound_Objective__PROXY_4 () |
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| void | _Obj_INVIS_PlayersDiedinRound_Objective__PROXY_5 () |
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| void | _Obj_INVIS_PlayersDiedinRound_Objective__PROXY_6 () |
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| void | _Obj_INVIS_PlayersDiedinRound_Objective__PROXY_7 () |
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| void | MCE_BC_NotAssembled (class UObject *Context) |
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| void | ExecuteUbergraph_Mission_CreatureSlaughter (int EntryPoint) |
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| int | GetNumberOfCompletedMissionChallenges () |
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| class AOakGameMode * | GetCurrentGameMode () |
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| void | UpdateObjective (class UMissionObjective *Objective, class UObject *Context, unsigned char Amount) |
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| void | UnpauseObjectiveChain (class UMissionObjective *Objective) |
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| void | ThwartObjectiveAndAdvanceObjectiveSet (class UMissionObjective *ObjectiveToThwart, class UMissionObjectiveSet *ObjectiveSet, bool bJumpToSet) |
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| void | StopMissionTimer () |
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| void | StartMissionTimer () |
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| bool | MissionRemoteEvent (const struct FName &EventName) |
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| void | MissionNotStarted () |
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| void | MissionKickoff () |
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| bool | MissionGameModeEvent (const struct FName &EventName) |
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| void | MissionFailed () |
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| void | MissionCompleteLoad () |
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| void | MissionComplete () |
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| void | MissionActiveLoad () |
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| void | MissionActive () |
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| void | JumpToObjectiveSet (class UMissionObjectiveSet *ObjectiveSet, bool bIsBranchingMission) |
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| void | GetPausableChainedObjectivesList (TArray< class UMissionObjective * > *ObjectivesList) |
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| void | GetObjectivesList (TArray< class UMissionObjective * > *ObjectivesList) |
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| void | GetObjectiveSetsList (TArray< class UMissionObjectiveSet * > *ObjectiveSetsList) |
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| int | GetMissionRemainingSeconds () |
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| void | FailMission () |
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| void | EndKickoff () |
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| void | CompleteMission () |
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| void | ClearObjective (class UMissionObjective *Objective) |
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| void | AdvanceObjectiveSet (class UMissionObjectiveSet *ObjectiveSet) |
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| void | AddTimeToMission (int SecondsToAdd) |
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| void | ActivateMission (class UMissionObjectiveSet *InitialObjectiveSet) |
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| std::string | GetName () const |
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| std::string | GetFullName () const |
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| bool | IsA (UClass *cmp) const |
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| void | ProcessEvent (class UFunction *function, void *parms) |
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| void | ExecuteUbergraph (int EntryPoint) |
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Ping Pong
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{# Test with https://developers.facebook.com/tools/debug/og/object?q=uwflow.com #} {% block head_tags %} {% endblock %} {# For local development, use local fonts for faster load times (especially when internet is crappy), but serve out of Google Fonts on production because Google's CDN has some magic to detect and serve fonts that aren't broken if the user is on Windows. #} {% if env == 'dev' %} {% else %} {% endif %} {% block stylesheets %} {% endblock %} {% block head_scripts %} {% endblock %} {# Airbrake #} {# From: https://github.com/airbrake/airbrake-js #} {% if env == 'prod' %} {% endif %} {# Google Analytics #} {# Mixpanel #} {% block head_misc %} {% endblock %}
{# TODO(david): Real responsive layout: http://twitter.github.com/bootstrap/scaffolding.html#responsive #}


 They can also stimulate your body for more power, better training and pain relief. Our electronics are seamlessly integrated into clothing, making them highly comfortable, smooth and washable. Easy to integrate, the Nanoleq product platform is a game changer for the long-awaited scaleup of the smart textile market.
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You can search using options like price range, manufacturer (make), state or directly type the model to get a specific car, also combining more search parameters produces more results matching any parameters specified


Raju Jettappa Completed BCA 2nd Year
Swapnil Virkar Completed BCA 2nd Year
Tanuja Deshmukh Completed BCA 2nd Year
Tejas Kshirsagar Completed BCA 2nd Year
Shivansh Patel Completed BCA 2nd Year


Preparation time
less than 30 mins
Cooking time
10 to 30 mins
Serves
Serves 4
Dietary
For the fritters, mix the flour, baking powder, paprika, salt and freshly ground black pepper and sugar in a bowl.
In a separate bowl, whisk the eggs and milk together.
Gradually add the egg and milk mixture to the dry ingredients, whisking constantly, to form a smooth batter.
Place the courgettes, sweetcorn and spring onions into a bowl and mix well.
Add some of the batter to the vegetable mixture - just enough to bind the vegetables together.
Heat the oil in a frying pan over a medium heat. Place a large spoonful of the fritter mixture into the pan and cook for 2-3 minutes on each side, or until golden-brown all over. Remove and drain on kitchen paper. Set aside in a warm place and repeat the process until all the fritter mixture is used up.
For the salsa, crush the olives gently with a pestle and mortar (or blend with a food processor). Place the olives into a bowl with all of the other salsa ingredients and mix well.
To serve, place two fritters on each plate and serve a dollop of salsa alongside.


Police
Metro Transit Police Department
Welcome to the Metro Transit Police Department, one of the fastest-growing, most diverse police agencies in Minnesota.
On board, on foot or on the rail, the Metro Transit Police Department is committed to the personal safety, quality of life, and protection of property for everyone in our transit community.
We’re a full-service 24-hour licensed police department that responds to, and investigates, all crimes occurring on Metro Transit property, including buses, light rail, commuter trains, facilities and rights-of-way throughout eight counties and 85 cities. Our 120 full-time officers and 60 part-time officers are fully-sworn peace officers with the same powers of arrest as other city or county law enforcement agencies.
We’re committed to maintaining and cultivating a diverse department. Nearly half of our force is made up of women and people of color. And more than half of the officers in our 2017 recruit academy are women and people of color, and half of them speak more than one language, including Hmong, Laotian, Spanish, Somali, Arabic and Turkish.
We believe in community policing which addresses crime by building and maintaining relationships between beat officers and citizens in their neighborhoods. This approach drives us to proactively keep the peace using proven problem-solving methods and partnerships that elevate the quality of life in our neighborhoods.
We strive to provide excellent police service each and every day. Whether you are using transit to travel to work, school, home or simply visiting, we want your experience to be safe, fun and memorable.
Our mission statement
Protecting the community through innovation and problem-solving.
Our core values
Innovation
We achieve a continuing standard of excellence through problem-solving and by maximizing effective policing.
Partnerships
We work in partnership with transit and the community to prevent crime and disorder.
Ethics
We hold ourselves to the highest ethical standards and treat all we encounter with courtesy, dignity and respect.
Diversity
We embrace diversity within our communities and promote it within our organization.
Education
We support continuous learning and the development of our staff, department and the community.


8 Hours of Coverage
60 Photos
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Copyrights
B & W Photo Copies
This package comes with all the care & concern of a former bride who wished she'd captured more memories on her own special day. I've perfected my skills in this art and I'm attentive to even the most minute details. I want to respect you, your guests, and the memory of your experience as it's taking place so you can trust that your time with me will be well spent. Contact me and let's talk!


Google Challenge Course
https://github.com/Syphontwo/GoogleChallangeCourseA collection of notes and projects from the front end developer google challenge course
A collection of notes and projects from the front end developer google challenge course
This webpage contains all the work related to the Udacity FEND Nanodegree program


Is the space between the border and the element.
Margin is the space outside the element, outside of any defined border.
Border is what separates elements from each other.
Is applied to the inside of the border. You need to have a border in order for padding to work. It deals with the inner space between the element and the border.
Is applied to the outside of an element. It does not need a border to work as it will use the element to determine the distance. It deals with the outer space and it effects how far away the elements are from each other.


"The Node bug has bitten me."
While going through a friend's blog recently, I bumped into a post titled 'Yo Dawg!, your site is down?' in which he talks about writing a CLI script for checking the availability of his websites. I love home grown solutions that solve our day to day problems and this post left me inspired to write my own uptime monitor.
Today I will take you through a step by step process of creating a NodeJS app/bot for monitoring my websites. The app/bot will send me an email whenever a site is down. The app repo will be hosted on github and once it is complete we'll deploy it to Heroku.
Create a directory for the app, I named mine ping
. Inside the directory create another directory named lib
and 3 files: README.md
, package.json
, and app.js
.
The package.json
file will be used by npm (a package manger used by Node) for metadata purposes as well as to install all dependencies. The lib
directory is where we'll place most of the app code.
Inside the ping/lib
directory create a file named ping.js
, this is where we'll write the main code that drives the app.
Now our repo looks something like this:
/ping
README.md
app.js
package.json
/lib
ping.js
This is how our package.json file looks like.
{
"name":"Ping",
"version":"0.0.1",
"description":"Node uptime monitor",
"main":"app.js",
"repository":{
"type":"git",
"url":"https://github.com/qawemlilo/ping.git"
},
"keywords":[
"uptime",
"monitor"
],
"dependencies":{
"request":"~2.12.0",
"nodemailer":"0.3.x"
},
"author":"Qawelesizwe Mlilo",
"license":"MIT",
"engines":{
"node":"0.8.x",
"npm":"1.1.x"
}
}
The important thing to note from package.json
is that our app is going to use 2 dependencies:
The README.md
file is for documentation purposes, for this project just write the app name and save it.
 If the request fails an email will be sent out to you.
First let's load some modules and create a basic Constructor function.
var request = require('request'),
statusCodes = require('http').STATUS_CODES;
/*
Ping Constructor
*/
function Ping (opts) {
// holds website to be monitored
this.website = '';
// ping intervals in minutes
this.timeout = 15;
// interval handler
this.handle = null;
// initialize the app
this.init(opts)
}
We start with 3 properties whose purpose is explained in comments. The options that are passed when an instance is created are used by the Ping.init
method to assign the website and timeout values.
/*
Methods
*/
Ping.prototype = {
init: function (opts) {
var self = this;
self.website = opts.website;
self.timeout = (opts.timeout * (60 * 1000));
// start monitoring
self.start();
},
Once the Ping.init
method has assigned website and timeout values according the app is ready to start sending requests and promptly calls the Ping.start
method.
start: function () {
var self = this,
time = Date.now();
console.log("\nLoading... " + self.website + "\nTime: " + time + "\n");
// create an interval for pings
self.handle = setInterval(function () {
self.ping();
}, self.timeout);
},
The Ping.start
method is pretty straight forward, it logs the loading message and creates intervals that call the method Ping.ping
.
Ping.ping
uses request
to load a website, if the request is successful Ping.isOk
is called otherwise Ping.isNotOk
is called.
ping: function () {
var self = this, currentTime = Date.now();
try {
// send request
request(self.website, function (error, res, body) {
// Website is up
if (!error && res.statusCode === 200) {
self.isOk();
}
// No error but website not ok
else if (!error) {
self.isNotOk(res.statusCode);
}
// Loading error
else {
self.isNotOk();
}
});
}
catch (err) {
self.isNotOk();
}
},
isOk: function () {
this.log('UP', 'OK');
},
isNotOk: function (statusCode) {
var time = Date.now(),
self = this,
time = self.getFormatedDate(time),
msg = statusCodes[statusCode + ''],
htmlMsg = '
Time: ' + time;
htmlMsg +='

Website: ' + self.website;
htmlMsg += '

Message: ' + msg + '
';
this.log('DOWN', msg);
// Send admin and email
mailer({
from<EMAIL_ADDRESS>to<EMAIL_ADDRESS>subject: self.website + ' is down',
body: htmlMsg
}, function (error, res) {
if (error) {
console.log(error);
}
else {
console.log(res.message || 'Failed to send email');
}
});
},
log: function (status, msg) {
var self = this,
time = Date.now(),
output = '';
output += "\nWebsite: " + self.website;
output += "\nTime: " + time;
output += "\nStatus: " + status;
output += "\nMessage:" + msg + "\n";
console.log(output);
},
getFormatedDate: function (time) {
var currentDate = new Date(time);
currentDate = currentDate.toISOString();
currentDate = currentDate.replace(/T/, ' ');
currentDate = currentDate.replace(/\..+/, '');
return currentDate;
}
}
module.exports = Ping;
Ping.isNotOk
calls a mailer module that I have created - inside the lib
directory create a file named mailer.js
and open it up in your text editor.
This module uses nodemailer to send emails and I have chosen to use Gmail SMTP. Please read more about how nodemailer works on this page. The config file contains my Gmail email and application password.
var nodemailer = require('nodemailer'),
config = require('../config'),
mailer;
mailer = function (opts, fn) {
var mailOpts, smtpTrans;
// nodemailer configuration
try {
smtpTrans = nodemailer.createTransport('SMTP', {
service: 'Gmail',
auth: {
user: config.email,
pass: config.password
}
});
}
catch (err) {
fn('Nodemailer could not create Transport', '');
return;
}
// mailing options
mailOpts = {
from: opts.from,
replyTo: opts.from,
to: opts.to,
subject: opts.subject,
html: opts.body
};
// Send maail
try {
smtpTrans.sendMail(mailOpts, function (error, response) {
//if sending fails
if (error) {
fn(true, error);
}
//Yay!! message sent
else {
fn(false, response.message);
}
});
}
catch (err) {
fn('Nodemailer could not send Mail', '');
}
};
module.exports = mailer;
Create a file named config.js
in the root directory of the app.
module.exports = {
email<EMAIL_ADDRESS>password: 'xxxxxxxx'
};
Back to lib/ping.js
, let us include the mailer module at the top of the file.
var request = require('request'),
statusCodes = require('http').STATUS_CODES,
mailer = require('./mailer'); // this line loads mailer.js
So far so good, our application can now load a website at regular intervals and if the request fails send out an email.
At the beginning of this post we created a file named app.js
, this is the file that Node will execute to get our app started. The app uses the forEach method to iterate over the list of websites, create a Ping instance for each website and store it in the monitors array.
var Ping = require('./lib/ping'),
websites = [
{
url: 'http://www.bookmarkmanager.co.za',
timeout: 5
},
{
url: 'http://crushit-compiler.herokuapp.com',
timeout: 1
}
],
monitors = [];
websites.forEach(function (website) {
var monitor = new Ping ({
website: website.url,
timeout: website.timeout
});
monitors.push(monitor);
});
The proof is in the pudding - from your terminal let's start the app with node.
node app.js
Our app is now fully functional but there are a few issues. The app is not accessible via the browser and the websites array will clutter my code once I start adding more websites. The solution is to create an http server and move my websites list to an external file.
var Ping = require('./lib/ping'),
websites = require('./websites'),
http = require('http'),
server,
port = process.env.PORT || 3008,
monitors = [];
websites.forEach(function (website) {
var monitor = new Ping ({
website: website.url,
timeout: website.timeout
});
monitors.push(monitor);
});
server = http.createServer(function (req, res) {
var data = "Monitoring the following websites: \n \n" + websites.join("\n");
res.end(data);
});
server.listen(port);
console.log('Listening to port %s', port);
/*
List of websites to be monitored
*/
module.exports = [
{
url: 'http://www.rflab.co.za',
timeout: 15
},
{
url: 'http://www.bookmarkmanager.co.za',
timeout: 15
},
{
url: 'http://crushit-compiler.herokuapp.com',
timeout: 15
},
{
url: 'http://node-ping.herokuapp.com',
timeout: 5
},
{
url: 'http://www.sanatural.co.za/home/',
timeout: 15
}
];
Now when you access the app from a browser you get a list of all monitored websites.
Another option that you might like to have is the ability to stop a running monitor, let us get back to lib/pings.js
and add a method to do just that.
stop: function () {
clearInterval(this.handle);
this.handle = null;
}
We also need to modify the Constructor so that it returns its object.
/*
Ping Constructor
*/
function Ping (opts) {
// holds website to be monitored
this.website = '';
// ping intervals in minutes
this.timeout = 15;
// interval handler
this.handle = null;
// initialize the app
this.init(opts);
return this;
}
That's it - an instance of Ping can now be stopped by calling Ping.stop
.
Heroku is an awesome cloud platform for hosting apps and they offer a free package for small apps that run on a single dyno. There is a detailed guide on their website on how to deploy your Node projects: https://devcenter.heroku.com/articles/nodejs.
Once you have set up heroku on your computer you can now deploy the app.
heroku create
git push heroku master
Pro Tip: If your application is inactive for about an hour, heroku puts it offline. Add your application address to the list of monitored websites to ensure that it doesn't stop working.
Here is a challenge for you to get your hands dirty with Node - create a web interface for adding and removing websites to the monitored list.
I hope this article has demonstrated how easy and fun it is to create apps with Node.js, now I don't need to pay a third party service to monitor my websites.


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ol和ul列表结构(ul/ol/dl)
1、普通列表
2、ol列表
- HTML,CSS and JavaScript User Interface
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About me
I am passionate Data Scientist.
Profesisonal Trajectory
-
Senior Data Scientist
Datalytics 24 - Basket Inc.
Feb 2020 - present
Primary focus is on NLP models for social media text analysis
-
Deep Learning Engineer
Stech.ai
Jan 2018 - Feb 2020
Worked on CNN and RNN based deep learning models
-
Machine Learning Engineer Intern
BIOMISA
Jan 2016 - Dec 2017
Worked on deep learning projects related to biomedical imaging
-
B.E. Computer Engineering
National University of Sciences and Technology (NUST)
Sept 2012 - Jun 2016
Key Coursework:
Projects
- gem5McPATparse Flex, Bison, C++ - translates the output of gem5 to McPAT format
- gem5-spm C++, Python - implementation of scratchpad memories in gem5 simulator
- iConmunicate Discontinued Android, Nearby, BT - messenger over bluetooth having a gallery of icons
- Look Around Discontinued Android, sensors, Unity, VR - reading QR retrieves information of places of interest, allowing to visualize it using virtual reality through the camera
- MusicSort Discontinued Python, Django, APIs - retrivies all the information of a set of songs uploaded, such as metadata, album cover, lyrics, etc.


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$PSVersionTable.PSVersion to determine the engine version. If the variable does not exist, it is safe to assume the engine is version 1.0.


Default usage
- (CNN) -- Two juvenile suspects were in custody Tuesday after a chemical device ruptured at SkyView Academy in Highlands Ranch, Colorado.
- The most emotional moment came well into the nearly hour-long address when Christie told the story of Craig Hanlon, a former drug addict from his hometown now working as a practicing attorney. Hanlon, who was seated near the front, stood up and hugged the governor to a lengthy ovation.
- Economy on the mend: Dimon said during a conference call after the earnings release that he was optimistic about the outlook for the U.S. economy.
- The accident happened Saturday on the White Nile River near Malakal in the northeast of the country, said Col. Philip Aguer of the Sudan People's Liberation Army.
- Authorities detained a seventh-grader who is "responsible for this," said State Police Chief Pete Kassetas.
- For a couple of years, the only living examples of the water lily were found in Bonn and London.
- As a precaution, five people -- four students and one teacher -- were transported to an area hospital, the Douglas County Sheriff's Office said in a statement. All have been medically cleared and released.
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|
| virtual | ~virtual_view ()=default |
| |
| | virtual_view (const virtual_view &)=delete |
| | Prevent copy (and move) constructor. More...
|
| |
| virtual_view & | operator= (const virtual_view &)=delete |
| | Prevent copy (and move) assignment. More...
|
| |
| virtual void | set (DataWarehouse *dw, const Patch *patch, bool use_ghosts) override |
| | Retrieve values from the DataWarehouse for a given patch. More...
|
| |
| virtual void | set (DataWarehouse *dw, const Level *level, const IntVector &low, const IntVector &high, bool use_ghosts) override |
| | Retrieve values from the DataWarehouse for a given region. More...
|
| |
| virtual Support | get_support () const override |
| | Get the region for which the view has access to the DataWarehouse. More...
|
| |
| virtual bool | is_defined_at (const IntVector &id) const override |
| | Check if the view has access to the position with index id. More...
|
| |
| virtual T & | operator[] (const IntVector &id) override |
| | Get/Modify value at position with index id (modifications are allowed if T is non const) More...
|
| |
| virtual V | operator[] (const IntVector &id) const override |
| | Get value at position. More...
|
| |
template<typename View, typename T>
class Uintah::PhaseField::detail::virtual_view< View, ScalarField< T > >
Abstract class for accessing variables on virtual patches (ScalarField implementation)
detail implementation of variable wrapping
- Template Parameters
-
| View | type of underlying view |
| T | type of the field value at each point |


Appeal to the tax tribunal
2. Appeal to the tribunal
You can appeal to the tax tribunal online. You can also use this service to close an enquiry.
To appeal, you must have:
- a scan or photo of your original notice or review conclusion letter
- reasons for your appeal, so the judge can understand your side of the argument
You'll also need to download and fill in an authorisation form if you want someone to represent you and they are not a practising solicitor or barrister.
Appeal by post
Download and fill in a notice of appeal form (T240).
Read the guidance notes if you need help.
If you're applying to close an enquiry, download and fill in application form (T245).
Send your completed form to the tribunal - the address is on the form.
If you need help
Contact the tax tribunal helpline if you have any questions about completing your appeal or application. The helpline can’t give you legal advice.
Tax tribunal helpline
Telephone: 0300 123 1024
Monday to Friday, 8:30am to 5pm
Find out about call charges
What happens next
You’ll get a letter from the tribunal explaining what happens next. You might be asked to provide more documents to support your case.
Not all cases will have a hearing, but you can ask for one. You’ll usually get at least 14 days’ notice of the date of the hearing. The tribunal will write to you with details of what you need to do.


| Author | Joep Suijs, Copyright © 2009..2009, all rights reserved. |
| Adapted-by | |
| Compiler | >=2.4g |
This library provides procedures to profile code parts. Intended for software development, uses timer1.
No dependency found
profiler_report(volatile byte out device)
profiler_start()
profiler_stop()
profiler_stop_and_report(volatile byte in out device)
profiler_setup(byte in resolution)
const byte m2[] = " us"
No documentation found
const byte m1[] = "Profiler "
No documentation found
profiler_report(volatile byte out device)
No documentation found
profiler_start()
No documentation found
profiler_stop()
No documentation found
profiler_stop_and_report(volatile byte in out device)
No documentation found
profiler_setup(byte in resolution)
No documentation found
| 16f648a | 16f648a_sqrt.jal |
| 16f723 | 16f723_sqrt.jal |
| 16f73 | 16f73_sqrt.jal |
| 16f877 | 16f877_sqrt.jal |
| 16f877a | 16f877a_sqrt.jal |
| 16f88 | 16f88_sqrt.jal |
| 18f14k50 | 18f14k50_sqrt.jal |
| 18f2450 | 18f2450_sqrt.jal |
| 18f2620 | 18f2620_sqrt.jal |
| 18f4550 | 18f4550_sqrt.jal |


Congress Working Committee Gives Nod For Alliance With Shiv Sena To Form Government In Maharashtra, Says Report
by IANSThe Congress Working Committee, the highest decision-making body of the party, met on Thursday (21 November) to discuss the issue of Maharashtra alliance with Shiv Sena and sources say that the CWC has given its go-ahead to the deal.
After the working committee meet, state In-charge Mallikarjun Kharge said, "We have informed the CWC about our parleys with NCP."
The three parties were scheduled to meet on Friday and announce the formation of alliance in Mumbai.
On Wednesday, the Congress-Nationalist Congress Party (NCP) had marathon meeting of five hours which ended around midnight and a Common Minimum Programme was agreed upon with Shiv Sena leaders over the phone.
(This story has been published from a wire agency feed without modifications to the text. Only the headline has been changed.)


Every time you start the CTF, 45 minutes will be alloted to complete the challenges.
Each question has some points to it depending upon the difficulty. Taking a hint will deduce 10% of the points associated with the question.
There is no particular order of solving the questions.
Judging of the round will be based on two parameters. The first is the score of the team and second is the time required. Teams having same score will be ranked by the time taken to solve the challenges.
Ranks can be viewed on the leaderboard page. The leaderboard time is updated everytime a submission is made.
Flags found are of the format Lakshya_CTF{some_text}. Some of the files may contain just the inner text within the brackets. Make sure you submit it in the format specified. Flag text is not case sensitive.
Incase your team doesn't have a laptop, the computer you are playing on has a kali-linux terminal environment setup for your needs. Feel free to install any extra tools you require.
This is a competitive environment with the aim of learning cyber security and ethical hacking. Please do not share the flags & solutions with others.
Internet access is granted. Feel free to explore and read about the concept behind the problem.
Special Instructions
Performing denial of service attacks on the server will lead to disqualification. Teams are requested to play ethically.
Brute force attacks on the flag form is prohibited.
We tried making this site pretty secure. It still may have vulnerabilites. If you tend to find one, feel free to use your superior advantage for your benefit.
Do not close your browser session while playing. All your information is recorded in the session.


Deep Dive
both are defined in the Dockerfile
CMD can be overriden on container creation
argument will be appended to the ENTRYPOINT
check out GitHub Docker Swarmkit
manage container individually
manage container in a cluster
The fist manager is the __Leader__. It will be the root CA for the complete cluster.
Access any service from any node.
DNS load balancing


from abc import ABC, abstractmethod
[docs]class AbstractApplication(ABC):
"""Abstract base class representing a mobile application and defining an interface
to interact with the application on the device.
Attributes:
package_name (str): The package name of the app.
version (str): The version number of the app (default is '0.0').
on_fg (bool): A flag indicating whether the app is in the foreground.
"""
def __init__(self, package_name, version="0.0"):
"""Initializes an AbstractApplication instance.
Args:
package_name (str): The package name of the app.
version (float, optional): The version number of the app (default is 0.0).
"""
self.package_name = package_name
self.version = version
self.on_fg = False
[docs] def get_app_id(self):
"""Get the unique app identifier.
Returns:
str: The app identifier in the format '<package_name>_<version>'.
"""
return f'{self.package_name}_{self.version}'
[docs] @abstractmethod
def start(self):
"""Abstract method to start the application."""
pass
[docs] @abstractmethod
def kill(self):
"""Abstract method to kill the application."""
pass
[docs] @abstractmethod
def stop(self):
"""Abstract method to stop the application."""
pass


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{{ page.title }}
{% endunless %} {{ content }}Recent Relevant Publications
Marc Sanchez-Artigas
Enhancing Tree-Based {ORAM} Using Batched Request Reordering
IEEE Trans. Information Forensics and Security, 2018.
[BibTeX]@article{Artigas18, author = {Marc S{\'{a}}nchez Artigas}, title = {Enhancing Tree-Based {ORAM} Using Batched Request Reordering}, journal = {IEEE Trans. Information Forensics and Security}, volume = {13}, number = {3}, pages = {590--604}, year = {2018}, doi = {10.1109/TIFS.2017.2762824}, }
Josep Sampe, Gil Vernik, Marc Sanchez-Artigas, Pedro Garcia-Lopez
Serverless Data Analytics in the IBM Cloud
19th ACM/IFIP Middleware Conference (Middleware), 2018, Acceptance rate: 19% (Industry Track) [CORE Rank A]
[BibTeX]@inproceedings{Sampe18, author = {Josep Samp{\'{e}} and Gil Vernik and Marc S{\'{a}}nchez Artigas and Pedro Garc{\'{\i}}a L{\'{o}}pez}, title = {Serverless Data Analytics in the {IBM} Cloud}, booktitle = {19th International Middleware Conference, Middleware Industrial Track 2018, Rennes, France, December 10-14, 2018}, pages = {1--8}, year = {2018}, }
Raul Gracia-Tinedo, Josep Sampe, Edgar Zamora-Gomez, Marc Sanchez-Artigas, Pedro Garcia-Lopez, Yosef Moatti, Eran Rom
Crystal: Software-Defined Storage for Multi-Tenant Object Stores
15th USENIX Conference on File and Storage Technologies (FAST), 2017 [CORE Rank A]
[BibTeX] [PDF]@inproceedings{Gracia17, author = {Ra{\'{u}}l Gracia Tinedo and Josep Samp{\'{e}} and Edgar Zamora{-}G{\'{o}}mez and Marc S{\'{a}}nchez Artigas and Pedro Garc{\'{\i}}a L{\'{o}}pez and Yosef Moatti and Eran Rom}, title = {Crystal: Software-Defined Storage for Multi-Tenant Object Stores}, booktitle = {15th USENIX Conference on File and Storage Technologies, FAST 2017, Santa Clara, CA, USA, February 27 - March 2, 2017}, pages = {243--256}, year = {2017}, }
Pierre Sutra, Etienne Riviere, Cristian Cotes, Marc Sanchez-Artigas, Pedro Garcia-Lopez, Emmanuel Bernard, William Burns, Galder Zamarreno
CRESON: Callable and Replicated Shared Objects over NoSQL
37th IEEE International Conference on Distributed Computing Systems (ICDCS), 2017, Acceptance rate: 16.9% [CORE Rank A]
[BibTeX]@inproceedings{Sutra17, author = {Pierre Sutra and Etienne Riviere and Cristian Cotes and Marc S{\'{a}}nchez Artigas and Pedro Garc{\'{\i}}a L{\'{o}}pez and Emmanuel Bernard and William Burns and Galder Zamarreno}, title = {CRESON: Callable and Replicated Shared Objects over NoSQL}, booktitle = {37th IEEE International Conference on Distributed Computing Systems, ICDCS 2017, Atlanta, GA, USA, June 5-8, 2017}, pages = {115--128}, year = {2017}, }
Yosef Moatti, Eran Rom, Raul Gracia-Tinedo, Dalit Naor, Doron Chen, Josep Sampe, Marc Sanchez-Artigas, Pedro Garcia-Lopez, Filip Gluszak, Eric Deschdt, Francesco Pace, Daniele Venzano, Pietro Michiardi
Too Big to Eat: Boosting Analytics Data Ingestion from Object Stores with Scoop
33rd IEEE International Conference on Data Engineering (ICDE), 2017 [CORE Rank A*]
[BibTeX] [PDF]@inproceedings{Moatti17, author = {Yosef Moatti and Eran Rom and Ra{\'{u}}l Gracia Tinedo and Dalit Naor and Doron Chen and Josep Samp{\'{e}} and Marc S{\'{a}}nchez Artigas and Pedro Garc{\'{\i}}a L{\'{o}}pez and Filip Gluszak and Eric Deschdt and Francesco Pace and Daniele Venzano and Pietro Michiardi}, title = {Too Big to Eat: Boosting Analytics Data Ingestion from Object Stores with Scoop}, booktitle = {33rd IEEE International Conference on Data Engineering, ICDE 2017, San Diego, CA, USA, April 19-22, 2017}, pages = {309--320}, year = {2017}, }
Mennan Selimi, Llorenç Cerda-Alabern, Marc Sanchez-Artigas, Felix Freitag, Luis Veiga
Practical Service Placement Approach for Microservices Architecture
17th IEEE/ACM International Symposium on Cluster, Cloud and Grid Computing (CCGRID), 2017 [CORE Rank A]
[BibTeX]@inproceedings{Selimi17, author = {Mennan Selimi and Lloren{\c{c}} Cerd{\`{a}}{-}Alabern and Marc S{\'{a}}nchez Artigas and Felix Freitag and Lu{\'{\i}}s Veiga}, title = {Practical Service Placement Approach for Microservices Architecture}, booktitle = {17th IEEE/ACM International Symposium on Cluster, Cloud and Grid Computing, CCGRID 2017, Madrid, Spain, May 14-17,2017}, pages = {401--410}, year = {2017}, }
Josep Sampe, Marc Sanchez-Artigas, Pedro Garcia-Lopez, Gerard Paris
Data-driven Serverless Functions for Object Storage
18th ACM/IFIP/USENIX Middleware Conference (Middleware), 2017, Acceptance rate: 23% [CORE Rank A]
[BibTeX]@inproceedings{Sampe17, author = {Josep Samp{\'{e}} and Marc S{\'{a}}nchez Artigas and Pedro Garc{\'{\i}}a L{\'{o}}pez and Gerard Par{\'{i}}s}, title = {Data-driven Serverless Functions for Object Storage}, booktitle = {18th International Middleware Conference, Middleware 2017, Las vegas, Nevada, USA, December 11 - March 15, 2017}, year = {2017}, }
Raul Saiz, Marc Sanchez-Artigas, Pedro Garcia_Lopez
RSD: Rate-based Sync Deferment for Personal Cloud Storage Services
IEEE Communications Letters, 2017.
[BibTeX]@article{Saiz2017, author={R. S\'{a}iz-Laud\'{o} and Marc S{\'{a}}nchez Artigas and Pedro Garc{\'{\i}}a L{\'{o}}pez}, journal={IEEE Communications Letters}, title={RSD: Rate-based Sync Deferment for Personal Cloud Storage Services}, year={2017}, volume={21}, number={11}, pages={2384--2387}, keywords={Cloud computing;Data transfer;Delays;Google;Synchronization;Tools;Personal Cloud storage;file sync deferment}, doi={10.1109/LCOMM.2017.2731848}, ISSN={1089-7798}, month={November},} }


HOWARD'S END A film review by<EMAIL_ADDRESS>Copyright 1992<EMAIL_ADDRESS>Dir: James Ivory Starring: Vanessa Redgrave, Anthony Hopkins, Helena Bonham Carter, Emma Thompson
Review in short: An excellent movie from the same creative team that brought us A ROOM WITH A VIEW. Highly recommended, +3.5 (-4 to +4)
HOWARD'S END is another film from the same team (Dir: Ivory, Producer: Ismail Merchant, Screenplay: Ruth Prawer Jhabvala) that brough us another E. M. Forster book, A ROOM WITH A VIEW. This film reminds one very much of A ROOM WITH A VIEW--it has the same feeling to it.
The direction manages to set a pace that is slow without ever seeming to bog. The actors are allowed to unfold the story like a wonderful origami swan. Vanessa Redgrave is not in the film very long, but her presence as Ruth Wilcox is felt throughout the movie.
This is a better film than A ROOM WITH A VIEW. The story is handled better, and there is none of the confusion that seemed to mark A ROOM WITH A VIEW. Helena Bonham Carter, who played Lucy in A ROOM WITH A VIEW seems to have a gift for playing a headstrong late-Victorian era young lady. She is more mature in this role, and more head-strong as well, though she is not the center of the story this time.
Who is the center of the story is a question that could spark some argument. My opinion it must be Ruth Wilcox (Redgrave). Either her or Howard's End itself (a charming country estate).
The plot of the movie revolves around the interconnected lives of two sisters, Margaret and Helen Schlegel (Thompson and Carter) and a English family, the Wilcoxes, primarily Ruth Wilcox and Henry Wilcox (Redgrave and Hopkins), and a young man named Leonard Bast (Sam West). The plot is involved and interesting, but this is not a plot-driven movie.
We see a remarkable performance from Anthony Hopkins as a rich upper-class Englishman of rather questionable morals.
I must take the time to comment on the film itself, I saw it in 70 mm (from a 35mm print I believe) and was very impressed with the quality of the image. The colors are soft and moist looking, and there is a gauze-like feeling to the outdoor shots. It is much like A ROOM WITH A VIEW in this regard.
--<EMAIL_ADDRESS>kreme@#22 (FV3 Net) [303/722-2009] Vox Name of the Day: Amorphous Lad: (AKA Billy Squirt)
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Lexus LC Inspiration Series arrives from $205,512
Special-edition Japanese GT gets unique exterior and interior colourway, and coincides with the range-wide introduction of Apple CarPlay and Android Auto.
by James Wong- shares
Lexus Australia has confirmed pricing and specifications for the evergreen new LC Inspiration Series, available in strictly limited numbers and now on sale from $205,512 plus on-road costs.
"Fewer than 10 units" will be offered in Australia, according to the company's local arm, available with the distinctive Khaki Metal green exterior paint and tan 'L-Aniline' leather upholstery.
Buyers will able to also specify the brown interior with Graphite Black or Titanium exterior finishes, should they wish – but why would you, really?
Lexus says the 'L-Aniline' leather "is made using only the top one per cent of carefully selected hide and undergoes a special tanning process to ensure maximum softness".
Standard inclusions are 12-way adjustable front sports seats, contrasting black leather accents for the steering wheel, dashboard, seat bolsters and centre console, along with Alcantara inserts on the door panels.
The launch of the LC Inspiration Series also coincides with the debut of Apple CarPlay and Android Auto on all LC models purchased from November 1, complementing the existing 12.3-inch infotainment display with satellite navigation, DAB+ radio and 13-speaker Mark Levinson premium audio system.
Buyers of the Inspiration Series also get customised scuff plates – "a subtle reminder of rarity every time an owner opens the door".
The Lexus LC Inspiration Series is available in both LC500 and LC500h ($206,070) guises, powered by 351kW/540Nm 5.0-litre V8 and 264kW 3.5-litre V6 hybrid respectively.
Opting for the V8 gets you a 10-speed automatic driving the rear wheels, while the hybrid uses a trick combination of a four-speed auto teamed with a six-speed e-CVT driving the rear axle.
Click the images for the full gallery
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Lexus LC Inspiration Series arrives from $205,512


The Sitdown is where Aka Omg the host and producer sit down with a new guest every week to discuss various topics. In the show The
Sitdown we will be learning life lessons, wisdom, and knowledge from not necessarily experts, but from real people that are relatable and familiar. Aka Omg
hopes that from these sit-downs it will highlight the beauty of conversation and the power that it has to spread across communities and lend a helping
hand. You are never alone in any situation, but if you feel this way or maybe just want some extra company the come sit down with us.
This week's episode of The Sitdown your host Aka Omg gets entirely too drunk for the show and makes up words for
the entire show, but we still get an amazing show from an American Sniper. We get to hear about what sniper school is all about, his confirmed kills,
and the PTSD he lives with day to day from it.
This week's episode of The Sitdown we bring on the savvy world traveler Queen Bri that stays hungry for great food, cheap flights, and a cup
of noodles. You will gaining great knowledge from an experienced traveler on how to save money, the do's and dont's of oversea traveling, and how traveling SOLO can change your perspective and teach you
things about yourself that you didn't even know.


These tests are only for testing fallbacks in NOT EMULATED IE7 and IE8 and do not succeed in other browsers
FAILED
SUCCESS
RUNNING
All Images must be visible inside the grey boxes and look like the reference images.
Reference Images
Test 1
Test 2
Test 3
Test 4


In this project, the dataset contains house sale prices for King County, which includes Seattle. The data is taken from kaggle competition House Sales in King County, USA. It includes homes sold between May 2014 and May 2015. There are 19 house features and one dependent feature price
. The aim of the project is to estimate the house price.
age_after_renovation
using yr_sales
and yr_renovated
features.zipcode
has too many unique values, reduced it to 70 values.zipcode_houses
which gives number of houses in each zipcode.age
and age_after_renovation
.log1p
transformation of continuous numerical features.After comprehensive data cleaning and variable encodings, I tried various scikit learn algorithms including stacking and blending. I had created many categorical features and the catboost algorithm after standard scaling gave me the best adjusted r-squared value.
Here I used the module featuretools
to create the features. I used none of aggreation primitives and only one transform primitive "divide_numeric" to create new features using featuretools. Then I also created domain knowledge features such as boolean features and log-transform large numeric features but did not create dummy variables from them. Few notes: - Using both mutliply and divide primitives gave worse results than only using divide primitive. - Removing zero feature importance features not not removing gave almost same RMSE. - Using log(target) gave better results (note: we need to inverse log-transform to do model evaluation).
RMSE : 108,184.48
Explained Variance: 0.913972
R-Squared: 0.913156
Adjusted R-squared: 0.910206
scikit-learn
and pandas
can not deal with large data (>1GB
). To scale up the project, I used big data platform PySpark
.spark
is a scala package and pyspark
is the a python wrapper around it.pyspark
, mllib
is deprecated, so, I used only pyspark.ml
.Random Forest
in pyspark and tuned the hyper parameters to get the best Adjusted R-squared value.Using keras framework gave lower evaluation than boosting algorithms. I tried various artichitectures to deal with this regression problem.
Some observations: - making dummy variables gave worse result. - doing log transform of target gave worse result.
My results:
Explained Variance: 0.874334
R-Squared: 0.872386
RMSE : 131,142.79
Adjusted R-squared: 0.871464


Defines the RPC for getting interface status(es).
RPC Calls | |
| rpc | SLInterfaceOper::SLInterfaceGlobalsRegOp (SLInterfaceGlobalsRegMsg) returns(SLInterfaceGlobalsRegMsgRsp) |
| Interface Registration Operations. More... | |
| rpc | SLInterfaceOper::SLInterfaceGlobalsGet (SLInterfaceGlobalsGetMsg) returns(SLInterfaceGlobalsGetMsgRsp) |
| Used to retrieve global Interface info from the server. | |
| rpc | SLInterfaceOper::SLInterfaceGlobalsGetStats (SLInterfaceGlobalsGetMsg) returns(SLInterfaceGlobalsGetStatsMsgRsp) |
| Used to retrieve global Interface stats from the server. | |
| rpc | SLInterfaceOper::SLInterfaceGet (SLInterfaceGetMsg) returns(SLInterfaceGetMsgRsp) |
| Retrieve interface attributes and state. More... | |
| rpc | SLInterfaceOper::SLInterfaceGetNotifStream (SLInterfaceGetNotifMsg) returns(stream SLInterfaceNotif) |
| This call is used to get a stream of interface notifications. More... | |
| rpc | SLInterfaceOper::SLInterfaceNotifOp (SLInterfaceNotifMsg) returns(SLInterfaceNotifMsgRsp) |
| Used to enable/disable event notifications for a certain interface. More... | |
Messages | |
| message | SLInterfaceGlobalsRegMsg |
| Global Interface Registration Message. More... | |
| message | SLInterfaceGlobalsRegMsgRsp |
| interface registration response message. More... | |
| message | SLInterfaceGlobalsGetMsg |
| Global Interface Get message. More... | |
| message | SLInterfaceGlobalsGetMsgRsp |
| Global interface Get response message. More... | |
| message | SLInterfaceGlobalsGetStatsMsgRsp |
| Global Interface Get stats message. More... | |
| message | SLInterfaceGetMsg |
| Interface Get message. More... | |
| message | SLInterfaceInfoMsg |
| Interface Get Message result. More... | |
| message | SLInterfaceGetMsgRsp |
| Interface Get Message Response. More... | |
| message | SLInterfaceGetNotifMsg |
| Interface Get Notification message. More... | |
| message | SLInterfaceNotif |
| Interface Notification Event. More... | |
| message | SLInterfaceNotifMsg |
| Interface Notification message. More... | |
| message | SLInterfaceNotifMsgRes |
| Interface Notification message result. More... | |
| message | SLInterfaceNotifMsgRsp |
| Interface Notification message response. More... | |
Enumerations | |
| enum | SLInterfaceState { SL_IF_STATE_UNKNOWN = 0, SL_IF_STATE_DOWN = 1, SL_IF_STATE_UP = 2 } |
| The current state of the interface. More... | |
| enum | SLInterfaceNotifType { SL_INTERFACE_EVENT_TYPE_RESERVED = 0x0, SL_INTERFACE_EVENT_TYPE_ERROR = 0x1, SL_INTERFACE_EVENT_TYPE_INTERFACE_INFO = 0x2 } |
| Interface Event Notification types. More... | |
| rpc SLInterfaceOper::SLInterfaceGet | ( | SLInterfaceGetMsg | ) |
This call can be used to "poll" the current state of interfaces.
| rpc SLInterfaceOper::SLInterfaceGetNotifStream | ( | SLInterfaceGetNotifMsg | ) |
The caller must maintain the GRPC channel as long as there is interest in interface notifications. This call can be used to get "push" notifications for interface info. It is advised that the caller register for notifications before any interfaces are used to avoid any loss of notifications.
| rpc SLInterfaceOper::SLInterfaceGlobalsRegOp | ( | SLInterfaceGlobalsRegMsg | ) |
SLInterfaceGlobalsRegMsg.Oper = SL_REGOP_REGISTER: Global Interface registration. A client Must Register BEFORE interfaces can be modified/queried.
SLInterfaceGlobalsRegMsg.Oper = SL_REGOP_UNREGISTER: Global Interface un-registration. This call is used to end all interface notifications. This call cleans up all interface notifications previously requested.
SLInterfaceGlobalsRegMsg.Oper = SL_REGOP_EOF: Interface End Of File. After Registration, the client is expected to send an EOF message to convey the end of replay of the client's known objects. This is especially useful under certain restart scenarios when the client and the server are trying to synchronize their interfaces.
| rpc SLInterfaceOper::SLInterfaceNotifOp | ( | SLInterfaceNotifMsg | ) |
By default, all interface events are disabled. The user must enable notifications for the interested interfaces.
| message SLInterfaceGlobalsRegMsg |
| message SLInterfaceGlobalsRegMsgRsp |
This message is used to convey the result of the interface registration.
Attributes | |
| SLErrorStatus | ErrStatus = 1 |
| Error code. | |
| message SLInterfaceGlobalsGetMsg |
This message is used to query interface global capabilities.
| message SLInterfaceGlobalsGetMsgRsp |
This message is used to convey the response to the global capabilities query.
Attributes | |
| SLErrorStatus | ErrStatus = 1 |
| Error code. | |
| uint32 | MaxInterfacesPerBatch = 2 |
| Max interface objects within a single batch. | |
| message SLInterfaceGlobalsGetStatsMsgRsp |
This message is used to convey the response to the interface statistics query.
Attributes | |
| SLErrorStatus | ErrStatus = 1 |
| Error code. | |
| uint64 | SeqNum = 2 |
| Global Interface event sequence number. More... | |
| uint32 | InterfaceNotifCount = 3 |
| Num Interface notification requests added through the service layer. | |
| uint64 SLInterfaceGlobalsGetStatsMsgRsp::SeqNum = 2 |
The sequence number is equivalent to a timestamp
| message SLInterfaceGetMsg |
Attributes | |
| SLInterface | Key = 1 |
| Interface key attributes. More... | |
| uint32 | EntriesCount = 2 |
| Number of entries requested. | |
| bool | GetNext = 3 |
| if GetNext is FALSE: request up to 'EntriesCount' entries starting from the key If GetNext is TRUE, or if the key exact match is not found: request up to 'EntriesCount' entries starting from the key's next | |
| SLInterface SLInterfaceGetMsg::Key = 1 |
If the Key is not specified, then request up to the first 'EntriesCount' entries.
| message SLInterfaceInfoMsg |
Attributes | |
| SLInterface | SLIfInfo = 1 |
| Interface info. | |
| SLInterfaceState | IfState = 2 |
| Interface state. | |
| uint64 | SeqNum = 3 |
| Global Interface event sequence number. More... | |
| uint64 SLInterfaceInfoMsg::SeqNum = 3 |
The sequence number is equivalent to a timestamp
| message SLInterfaceGetMsgRsp |
Attributes | |
| bool | Eof = 1 |
| End Of File. More... | |
| SLErrorStatus | ErrStatus = 2 |
| Status of the Get operation. | |
| repeated SLInterfaceInfoMsg | Entries = 3 |
| Returned entries as requested in the Get operation. More... | |
| repeated SLInterfaceInfoMsg SLInterfaceGetMsgRsp::Entries = 3 |
if ErrStatus is SL_SUCCESS, Entries contains the info requested
| bool SLInterfaceGetMsgRsp::Eof = 1 |
When set to True, it indicates that the server has returned M, where M < N, of the original N requested Entries.
| message SLInterfaceGetNotifMsg |
| message SLInterfaceNotif |
Attributes | |
| SLInterfaceNotifType | EventType = 1 |
| Interface Event Notification type. | |
| oneof | Event |
| Further info based on EventType. More... | |
| SLInterfaceInfoMsg | Info = 3 |
| case EventType == SL_INTERFACE_EVENT_TYPE_INTERFACE_INFO: => this field carries the session state info | |
| oneof SLInterfaceNotif::Event |
| message SLInterfaceNotifMsg |
Attributes | |
| SLNotifOp | Oper = 1 |
| Notification Operation. | |
| repeated SLInterface | Entries = 2 |
| Interface key attributes. | |
| message SLInterfaceNotifMsgRes |
Attributes | |
| SLErrorStatus | ErrStatus = 1 |
| Corresponding error code. | |
| SLInterface | Key = 2 |
| Interface key attributes. | |
| message SLInterfaceNotifMsgRsp |
Attributes | |
| SLErrorStatus | StatusSummary = 1 |
| Summary result of the bulk operation (refer to enum SLErrorStatus) In general, the StatusSummary implies one of 3 things: More... | |
| repeated SLInterfaceNotifMsgRes | Results = 2 |
| In case of errors, this field indicates which entry in the bulk was erroneous. More... | |
| repeated SLInterfaceNotifMsgRes SLInterfaceNotifMsgRsp::Results = 2 |
| SLErrorStatus SLInterfaceNotifMsgRsp::StatusSummary = 1 |
| enum SLInterfaceNotifType |
| enum SLInterfaceState |


Tinsel roasting on an open fire? Dr. Manny's top tips for Christmas decorating safety
by Julia MustoChristmas is just around the corner and Fox News Health Senior Managing Editor Dr. Manny Alvarez has the top safety tips for holiday decorating.
According to the U.S. Consumer Product Safety Commission, there were over 18,000 people treated for holiday decorating-related injuries in 2017 and there were five deaths in 2018.
MOM CREATIVELY TURNS LAUNDRY PILE INTO CHRISTMAS TREE: 'I IMPROVISE'
Appearing on "Fox & Friends: First" with hosts Todd Piro and Carley Shimkus, Alvarez said Friday that there are many ways your festive traditions could backfire.
Alvarez's top safety tips include keeping the Christmas tree away from heat and consistently hydrating it, double-checking lights, using unbreakable ornaments, taking caution with poisonous plants and allergies, and working as a team.
"The big thing about the safety of decorating now and in the Christmas holiday is fire," he said. "As a matter of fact, I'd remind everybody that this is a good time to check your fire alarms' batteries."
Alvarez cautioned that there are big problems using older lights because they use more heat.
"So, that's a good thing to keep in mind," he told the "Friends: First" hosts.
The number one holiday-related injury is falling, so Alvarez advises to work together with family members.
MELANIA TRUMP WELCOMES CHRISTMAS TREE TO WHITE HOUSE
"When you're decorating – especially if you're putting lights around your house or in windows, whatever the case may be – just make sure that you have more than one person with you because you can lose your balance and break something," he said.
Lastly, Alvarez wants Americans to know about potentially harmful toxins in ornaments, plants, and even the tree!
CLICK HERE TO CHECK OUT THE FOX NEWS APP
He said that many "traditional hand-me-down family ornaments" were made with lead and the newer ornaments are plastic-based.
He also warned viewers to be careful around poinsettias and hollies with your pets and avoid nut dishes if you have guests with severe allergies.
"Always keep in mind about that," said Alvarez.


Record Sample
Logout
{% csrf_token %}
Sample type:
Core
Core Half Round
Core Piece
Core Quarter Round
Core Section
Core Section Half
Core Sub-Piece
Core Whole Round
CTD (Conductivity, Temperature, and Depth)
Cuttings
Dredge
Grab
Hole
Individual Sample
Oriented Core
Other
Rock Powder
Terrestrial Section
Parent IGSN:
Collector
Sample Name:
Description:
Private:
Off
On
Materials:
Biology
Gas
Liquid>aqueous
Liquid>organic
Mineral
Not applicable
Other
Particulate
Rock
Sediment
Soil
Collection Method:
Blasting
Camera SledCamera tow
Coring
Coring>BoxCorer
Coring>CameraMounted
CorerCoring>DrillCorer
Coring>FreeFallCorer
Coring>GravityCorer
Coring>GravityCorer>Giant
Coring>GravityCorer>Pilot
Coring>HandHeldCorer
Coring>KastenlotCorer
Coring>MultiCorer
Coring>PistonCorer
Coring>PistonCorer>Giant
Coring>RockCorer
Coring>SideSaddleCorer
Coring>SubmersibleMountedCorer
Coring>TriggerWeightCorer
Coring>VibratingCorer
Dredging
Dredging>Chain Bag
Dredging>ChainBagDredge
Grab
Grab>HOV
Grab>ROV
Manual
Probe
Sediment trap
Suspended sediment
Unknown
Latitude:
Longitude:
Elevation (m):
Location Name:
Locality:
Field name:


Compound found in U.S. vaping patients not allowed in Canadian cannabis products: officials
by The Canadian PressOTTAWA - Canadian health officials say a chemical compound discovered in lung fluid taken from 29 patients with a mysterious vaping related illness is not allowed in Canadian cannabis vaping products.
Still a spokesperson for Health Canada says the agency, along with the Public Health Agency of Canada, is actively monitoring the apparent U.S. breakthrough.
The U.S. Centers for Disease Control and Prevention say they have a "very strong culprit" in vitamin E acetate, which has only recently been used as a thickener in vaping fluid, particularly in black market vape cartridges.
While vitamin E is safe as a vitamin pill or to use on the skin, inhaling oily droplets of it can be harmful because the sticky substances can stay in the lungs.
More than 2,000 Americans have gotten sick since March -- many of them teens and young adults -- and at least 40 people have died.
There have been seven confirmed or probable cases of severe lung illness related to vaping in Canada -- two confirmed cases in Quebec, two probable cases in New Brunswick and three probable cases in B.C.
U.S. officials said Friday this is the first time they've found a common suspect in the damaged lungs of patients, but cautioned they cannot rule out all other toxic substances.


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See that "Continue" button below? Press that just a few times, and you'll be all set to post code to your Review Board server.
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In native javascript: In the event handler of your choice, call chronoCanvas, and use the canvasTarget parameter for target the canvas node. It will use the querySelectorAll function.
document.addEventListener('DOMContentLoaded', function(){
chronoCanvas({
canvasTarget: ".chronometer1"
});
})
Portions parameter is how many parts is split your pie chart. By default, set to 600.
Frequency time in milisecond is the interval when canvas is refreshing. By default set to 100.
In this example, you got 1 second between each refreshing. Then, the full turn take 1 minut, as the circle is divided in 60 portions. Compare to previous example with default values to see how it take finaly the same time, but how animation is different because of the interval and the portions.
require(['chronoCanvas'], function(chronoCanvas){
chronoCanvas({
canvasTarget: ".chronometer2",
portions: 60,
frequency: 1000
});
})
Iteration parameter give you the abilities to choose how many turn you want to do. It take a number as value. If set to 0, giving infinite loop. In the example bellow, will turn infinitely.
require(['chronoCanvas'], function(chronoCanvas){
chronoCanvas({
canvasTarget: ".chronometer3",
frequency: 1,
iteration: 0
});
})
outputEnd parameter allow you to launch a function at end of all the cycles you defined. See in example how the chronoCanvas is launch by a button, and launch an alert when all iterations are over.
function thiscallback(){
alert("end of turns!");
}
require(['chronoCanvas'], function(chronoCanvas){
document.getElementById('myButton').addEventListener("click",
function(){
chronoCanvas({
canvasTarget: ".chronometer4",
iteration: 2,
portions: 8,
frequency: 500,
outputEnd: thiscallback
});
}
,false);
})
ahead parameter receive a string with list of keywords, separated by simple spaces. The first keyword is unavoidably "stroke" or "fill". Stroke draw like a border, fill make the circle plain. If you choose "fill" parameter, you will have another parameter, the color. Can be hexadecimal or HTML color name
require(['chronoCanvas'], function(chronoCanvas){
chronoCanvas({
canvasTarget: ".chronometer5",
ahead: "fill red",
frequency: 10,
iteration: 0
});
})
If you choose stroke, you will have to add an another parameter, a number, before color, for designating the border thickness.
require(['chronoCanvas'], function(chronoCanvas){
chronoCanvas({
canvasTarget: ".chronometer6",
ahead: "stroke 30 tomato",
frequency: 10,
iteration: 0
});
})
In the same way as ahead, there is behind parameter, giving you the abilities to skinn the background! And, of course, never forget you can use any svg or pic in css background of a canvas!
require(['chronoCanvas'], function(chronoCanvas){
chronoCanvas({
canvasTarget: ".chronometer7",
behind: "stroke 30 #666",
ahead: "stroke 30 #FF6347",
frequency: 10,
iteration: 0
});
})


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videotex
`Prev `__
V
`Next `__
--------------
**videotex**: n. obs.
An electronic service offering people the privilege of paying to read
the weather on their television screens instead of having somebody read
it to them for free while they brush their teeth. The idea bombed
everywhere it wasn't government-subsidized, because by the time videotex
was practical the installed base of personal computers could hook up to
timesharing services and do the things for which videotex might have
been worthwhile better and cheaper. Videotex planners badly
overestimated both the appeal of getting information from a computer and
the cost of local intelligence at the user's end. Like the `*gorilla
arm* <../G/gorilla-arm.html>`__ effect, this has been a cautionary tale
to hackers ever since. See also `*vannevar* `__.
--------------
+----------------------------------+----------------------------+---------------------------+
| `Prev `__ | `Up <../V.html>`__ | `Next `__ |
+----------------------------------+----------------------------+---------------------------+
| video toaster | `Home <../index.html>`__ | virgin |
+----------------------------------+----------------------------+---------------------------+


ballerina/config module
Module overview
The ballerina/config
module provides the Config API to read configurations from environment variables, TOML files, and command-line parameters, and build a consolidated set of configurations.
The precedence order for configuration lookup is as follows:
- CLI parameters (used with the -e flag)
- Environment variables
- Configuration files in the TOML format
If a configuration is defined in both a configuration file and as an environment variable, the environment variable takes precedence. Similarly, if the same is set as a CLI parameter, it replaces the value of the environment variable. This configuration resolution happens at the start of the program execution. Configurations can be set programmatically as well.
The Config API provides the capability to feed sensitive data (e.g., passwords) to Ballerina programs securely by encrypting them.
Samples
Setting configurations
To explicitly specify a configuration file, the --config
or -c
flag can be used. If this flag is not set when running a project, Ballerina looks for a ballerina.conf
file in project root. When running a single file or a .balx
, it's picked from the same directory as the .balx
or source. The path to the configuration file can either be an absolute or a relative path.
ballerina run --config /path/to/conf/file/custom-config-file-name.conf my-program.bal
A configuration file should conform to the TOML format. Ballerina only supports the following features of TOML: value types (string, int, float and boolean), tables, and nested tables. Given below is a sample:
[b7a.http.tracelog]
console=true
path="./trace.log"
[b7a.http.accesslog]
console=true
path="./access.log"
A key given inside a bracket forms a namespace. Any configuration that is specified between two such keys belongs to the namespace of the first of these keys. To access a configuration in a namespace, the fully qualified key should be given (e.g., b7a.http.tracelog.path
).
The following types can be given through a configuration file: string
, int
, float
, and boolean
. If the configuration value is not an int
, float
, or a boolean
, it is considered a string
and should always be quoted.
The same configs can be set using CLI parameters as follows.
ballerina run -e b7a.http.tracelog.console=true -e b7a.http.tracelog.path=./trace.log
-e b7a.http.accesslog.console=true -e b7a.http.accesslog.path=./access.log my-program.bal
Configurations in a file can be overridden by environment variables. To override a particular configuration, an environment variable that matches the configuration key must be set. As periods are not allowed in environment variables, periods in a configuration key should be replaced by underscores.
// In Linux and Mac.
$ export b7a_http_tracelog_path=”./trace.log”
$ export b7a_http_accesslog_path=”./access.log”
// In Windows.
$ set(x) b7a_http_tracelog_path=”./trace.log”
$ set(x) b7a_http_accesslog_path=”./access.log”
If the configurations need to be shared during runtime, they can be set using the setConfig()
function. Such configs are also available to the entire Ballerina Virtual Machine (BVM).
config:setConfig("john.country", "USA");
Reading configurations
The API provides functions to read configs in their original type.
// Reads a configuration as a string.
string host = config:getAsString("host"); // Returns “” (i.e., empty string) if the configuration
//is not available.
// Reads a configuration as an integer.
int port = config:getAsInt("port"); // Returns 0 if the configuration is not available.
// Reads a configuration as a float.
float rate = config:getAsFloat("rate"); // Returns 0.0 if the configuration is not available.
// Reads a configuration as a boolean.
boolean enabled = config:getAsBoolean("service.enabled"); // Returns ‘false’ if the configuration
// is not available.
When reading a configuration, a default value can be specified as well. If a default value is specified, it is returned if a configuration entry cannot be found for the specified key.
// Reads a configuration as a string, and if it does not exist, returns “localhost”.
string host = config:getAsString("host", default = "localhost");
The contains()
function is used to check whether a configuration entry exists for the specified key.
// Checks whether the configuration is available.
boolean configAvailable = config:contains("host");
A set of configurations belonging to a particular namespace can be retrieved as a map
using the getAsMap()
function. Here is an example:
[b7a.http.tracelog]
console=true
path="./trace.log"
host="@env:{TRACE_LOG_READER_HOST}"
port=5757
[b7a.http.accesslog]
console=true
path="./access.log"
The configurations for HTTP trace logs can be retrieved as a map
as follows:
// Reads a configuration section as a map.
// Here, the map’s key-value pairs represent config key-value pairs.
map<any> serverAlphaMap = config:getAsMap("b7a.http.tracelog");
In the above configuration file, the host
is specified as @env:{TRACE_LOG_READER_HOST}
. When resolving the configurations, Ballerina looks for a variable named TRACE_LOG_READER_HOST
in the environment variables and maps b7a.http.tracelog.host
to its value.
If the specified environment variable does not exist, it will will treat @env:{TRACE_LOG_READER_HOST}
as a normal string value.
Securing configuration values
Sensitive values can be encrypted using the encrypt
command as follows:
$ ballerina encrypt
Enter value:
Enter secret:
Re-enter secret to verify:
Add the following to the runtime config:
@encrypted:{JqlfWNWKM6gYiaGnS0Hse1J9F/v48gUR0Kxfa5gwjcM=}
Or add the following to the runtime command-line:
-e<param>=@encrypted:{JqlfWNWKM6gYiaGnS0Hse1J9F/v48gUR0Kxfa5gwjcM=}
This encrypted value can then be placed in a configuration file or provided as a CLI parameter.
[admin]
password=”@encrypted:{JqlfWNWKM6gYiaGnS0Hse1J9F/v48gUR0Kxfa5gwjcM=}”
Reading config files with encrypted values
When trying to run a Ballerina program with a configuration file or CLI parameters that contain encrypted values, Ballerina will first check to see if the b7a.config.secret
configuration is set. This configuration is used to set the path to a file containing the secret required to decrypt the configurations. If it is set, the secret is read, and the secret file is deleted.
If a secret file is not provided, the user is prompted to enter the secret. Values are decrypted only on demand when an encrypted value is looked up using the getAsString()
function.
$ ballerina run program.bal
ballerina: enter secret for config value decryption:
Note: The same config file cannot contain values that are encrypted using different secrets.
Module Detail
Functions
| Function | Description |
|---|---|
| contains | Checks whether the given key is in the configuration registry. |
| getAsBoolean | Retrieves the specified configuration value as a boolean. |
| getAsFloat | Retrieves the specified configuration value as a float. |
| getAsInt | Retrieves the specified configuration value as an int. |
| getAsMap | Retrieves the specified configuration value as a map. If there is no mapping, an empty map will be returned. |
| getAsString | Retrieves the specified configuration value as a string. |
| setConfig | Sets the specified key/value pair as a configuration. |
public function contains(string key) returns (boolean)
Checks whether the given key is in the configuration registry.
| Parameter Name | Data Type | Default Value | Description |
|---|---|---|---|
| key | string | The configuration key to be looked-up |
| Return Type | Description | ||
|---|---|---|---|
| boolean | Returns true if the key is present; if not returs false |
public function getAsBoolean(string key, boolean default) returns (boolean)
Retrieves the specified configuration value as a boolean.
| Parameter Name | Data Type | Default Value | Description |
|---|---|---|---|
| key | string | The configuration to be retrieved |
|
| default | boolean | false | The default value to be use in case there is no mapping for the provided key |
| Return Type | Description | ||
|---|---|---|---|
| boolean | Configuration value mapped by the key |
public function getAsFloat(string key, float default) returns (float)
Retrieves the specified configuration value as a float.
| Parameter Name | Data Type | Default Value | Description |
|---|---|---|---|
| key | string | The configuration to be retrieved |
|
| default | float | 0.0 | The default value to be use in case there is no mapping for the provided key |
| Return Type | Description | ||
|---|---|---|---|
| float | Configuration value mapped by the key |
public function getAsInt(string key, int default) returns (int)
Retrieves the specified configuration value as an int.
| Parameter Name | Data Type | Default Value | Description |
|---|---|---|---|
| key | string | The configuration to be retrieved |
|
| default | int | 0 | The default value to be use in case there is no mapping for the provided key |
| Return Type | Description | ||
|---|---|---|---|
| int | Configuration value mapped by the key |
public function getAsMap(string key) returns (map<any>)
Retrieves the specified configuration value as a map. If there is no mapping, an empty map will be returned.
| Parameter Name | Data Type | Default Value | Description |
|---|---|---|---|
| key | string | The configuration to be retrieved |
| Return Type | Description | ||
|---|---|---|---|
| map |
Configuration value mapped by the key |
public function getAsString(string key, string default) returns (string)
Retrieves the specified configuration value as a string.
| Parameter Name | Data Type | Default Value | Description |
|---|---|---|---|
| key | string | The configuration to be retrieved |
|
| default | string | The default value to be use in case there is no mapping for the provided key |
| Return Type | Description | ||
|---|---|---|---|
| string | Configuration value mapped by the key |


Rizki Nurhasan
Data Scientist
enjoy the process of being whatever it is because in every process there is a sense of gratitude that is beautiful gratitude and everyone's path is different so don't be jealous of their way just focus on yours.
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