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Is double square brackets [[ ]] preferable over single square brackets [ ] in Bash?
... is generally safer to use. But it is not portable - POSIX doesn't specify what it does and only some shells support it (beside bash, I heard ksh supports it too). For example, you can do
[[ -e $b ]]
to test whether a file exists. But with [, you have to quote $b, because it splits the argument ...
twitter-bootstrap vs jquery-mobile [closed]
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Isn't that what it says?
– Josh Mouch
Sep 5 '13 at 16:41
1
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How to tell whether a point is to the right or left side of a line
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For what it's worth, this can be slightly simplified to return (b.x - a.x)*(c.y - a.y) > (b.y - a.y)*(c.x - a.x);, but the compiler probably optimizes that anyway.
– Nicu Stiurca
Oct 7 '1...
What does immutable mean?
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What about below code. The string value is changed now. var name = "Santosh"; console.log(name.substr(0,2)); var name = "kumar" console.log(name); How its still immutable
– Santosh
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Performance of static methods vs instance methods
..., or you're tangling up chains of object-passing in complicated ways to do what should naturally be instance.
Hence for number 1. When keeping state isn't a concern, it's always better to be static, because that's what static is for. It's not a performance concern, though there is an overall rule o...
Lambda expression vs method reference [closed]
...nd you should ignore them. The goal is writing code that is crystal clear what it does. Very often (but not always!) method refs win on this metric, so we included them as an option, to be used in those cases.
A key consideration about whether method refs clarify or obfuscate intent is whether ...
What is the purpose of “!” and “?” at the end of method names?
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Adding to what @JörgWMittag stated, according to the Ruby Style Guide: The names of potentially dangerous methods (i.e. methods that modify self or the arguments, exit! (doesn't run the finalizers like exit does), etc.) should end wi...
Is it possible to use “/” in a filename?
...*name)
return 0;
...
This code applies to any file system. What's this mean? It means that if you try to pass a parameter with an actual '/' character as the name of the file using traditional means, it will not do what you want. There is no way to escape the character. If a filesyst...
How to replace an item in an array with Javascript?
... contains function to abstract this check and make it easier to understand what's going on. What's awesome is this works on arrays and strings both:
var contains = function (haystack, needle) {
return !!~haystack.indexOf(needle);
};
// can be used like so now:
if (contains(items, 3452)) {
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What does $NON-NLS-1$ mean?
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So, what does NLS stand for?
– MatrixFrog
Jul 15 '10 at 20:07
40
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