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Hex representation of a color with alpha channel?
Is there a W3 or any other noteworthy standard on how to represent a color (including alpha channel) in hex format?
5 Answe...
How to return smart pointers (shared_ptr), by reference or by value?
...ization (RVO), so you won't incur a increment-increment-decrement sequence or something like that in modern compilers. So the best way to return a shared_ptr is to simply return by value:
shared_ptr<T> Foo()
{
return shared_ptr<T>(/* acquire something */);
};
This is a dead-obviou...
if…else within JSP or JSTL
...
Thx for that...Actually I am more into UI dev...So do not have much knowledge of JSTL..Could you please provide me a similar working example of JSTL..I mean for if..else
– testndtv
May 9 '11 ...
How to use “raise” keyword in Python [duplicate]
...
It has 2 purposes.
yentup has given the first one.
It's used for raising your own errors.
if something:
raise Exception('My error!')
The second is to reraise the current exception in an exception handler, so that it can be handled further up the call stack.
try:
generate_exce...
Why does Google prepend while(1); to their JSON responses?
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It prevents JSON hijacking, a major JSON security issue that is formally fixed in all major browsers since 2011 with ECMAScript 5.
Contrived example: say Google has a URL like mail.google.com/json?action=inbox which returns the first 50 messages of your inb...
jQuery multiple events to trigger the same function
... keypress , blur , and change events call the same function in one line or do I have to do them separately?
11 Answers
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Referring to the null object in Python
...n, the 'null' object is the singleton None.
The best way to check things for "Noneness" is to use the identity operator, is:
if foo is None:
...
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JavaScript Chart Library
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There is a growing number of Open Source and commercial solutions for pure JavaScript charting that do not require Flash. In this response I will only present Open Source options.
There are 2 main classes of JavaScript solutions for graphics that do not require Flash:
Canvas-based, render...
What file uses .md extension and how should I edit them?
...n GitHub, several projects have README.md files. It seems like a simple format file to express text and pictures.
16 Ans...
Difference between abstract class and interface in Python
...cted to supply."""
def aMethod( self ):
raise NotImplementedError( "Should have implemented this" )
Because Python doesn't have (and doesn't need) a formal Interface contract, the Java-style distinction between abstraction and interface doesn't exist. If someone goes through the effor...