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What does T&& (double ampersand) mean in C++11?
...UTION: the linked article on MSDN ("Rvalue References: C++0x Features in VC10, Part 2") is a very clear introduction to Rvalue references, but makes statements about Rvalue references that were once true in the draft C++11 standard, but are not true for the final one! Specifically, it says at variou...
How do I do string replace in JavaScript to convert ‘9.61’ to ‘9:61’?
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answered Jan 27 '10 at 10:19
ReigelReigel
60.2k2020 gold badges113113 silver badges132132 bronze badges
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PHP array_filter with arguments
... $i < $this->num;
}
}
Usage (demo):
$arr = array(7, 8, 9, 10, 11, 12, 13);
$matches = array_filter($arr, array(new LowerThanFilter(12), 'isLower'));
print_r($matches);
As a sidenote, you can now replace LowerThanFilter with a more generic NumericComparisonFilter with methods lik...
Javascript: How to check if a string is empty? [duplicate]
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answered Mar 4 '10 at 17:46
Dustin LaineDustin Laine
35.3k99 gold badges7878 silver badges119119 bronze badges
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Excluding directory when creating a .tar.gz file
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10 Answers
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How to convert a string to an integer in JavaScript?
... simplest way would be to use the native Number function:
var x = Number("1000")
If that doesn't work for you, then there are the parseInt, unary plus, parseFloat with floor, and Math.round methods.
parseInt:
var x = parseInt("1000", 10); // you want to use radix 10
// so you get a decimal ...
What does curly brackets in the `var { … } = …` statements do?
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answered Mar 8 '13 at 10:09
BlenderBlender
245k4343 gold badges378378 silver badges444444 bronze badges
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What is stack unwinding?
...dling. Here's an example:
void func( int x )
{
char* pleak = new char[1024]; // might be lost => memory leak
std::string s( "hello world" ); // will be properly destructed
if ( x ) throw std::runtime_error( "boom" );
delete [] pleak; // will only get here if x == 0. if x!=0, th...
Calling shell functions with xargs
...the function should do it (untested):
export -f echo_var
seq -f "n%04g" 1 100 | xargs -n 1 -P 10 -I {} bash -c 'echo_var "$@"' _ {}
You can use the builtin printf instead of the external seq:
printf "n%04g\n" {1..100} | xargs -n 1 -P 10 -I {} bash -c 'echo_var "$@"' _ {}
Also, using return 0 a...
Green Bars in Visual Studio 2010
I am wondering what these greens things are in Visual Studio 2010. What are they for? They look pretty random but of course they have to have some meaning. Can any one tell me?
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