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Algorithm to find Largest prime factor of a number
...fast if the input number has two factors very close to its square root is known as Fermat factorisation. It makes use of the identity N = (a + b)(a - b) = a^2 - b^2 and is easy to understand and implement. Unfortunately it's not very fast in general.
The best known method for factoring numbers up t...
how to break the _.each function in underscore.js
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right now (05/2013), there is neither a _.every() nor a _.all() method for arrays in underscore - so stick to the Array.every().
– pkyeck
May 9 '13 at 9:09
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How to use a keypress event in AngularJS?
... ng-click.
for instance:
<a ng-click="action()">action</a>
Now, let's add keyboard support.
trigger by enter key:
<a ng-click="action()"
ng-keydown="$event.keyCode === 13 && action()">action</a>
by space key:
<a ng-click="action()"
ng-keydown="$eve...
Check free disk space for current partition in bash
...ipt, so the first action should be to check that there is enough space. I know that df will report all file systems, but I was wondering if there was a way to get the free space just for the partition that the target directory is on.
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Length of a JavaScript object
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This doesn't have to modify any existing prototype since Object.keys() is now built in.
Edit: Objects can have symbolic properties which can not be returned via Object.key method. So the answer would be incomplete without mentioning them.
Symbol type was added to the language to create unique ide...
Two divs, one fixed width, the other, the rest
...e left <div> anchored at left:0;right:250px, see this demo. I'll say now that this will not work in IE6 as only one corner of a <div> can be absolutely positioned on a page (see here for full explanation).
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How to resolve “must be an instance of string, string given” prior to PHP 7?
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As of PHP 7.0 type declarations allow scalar types, so these types are now available: self, array, callable, bool, float, int, string. The first three were available in PHP 5, but the last four are new in PHP 7. If you use anything else (e.g. integer or boolean) that will be interpreted as a cla...
C++, variable declaration in 'if' expression
...nd part (bool a = false) should be not be evaluated because it is already known that the final answer will be false. If (bool a = false) isn't evaluated, then what to do with code later on that uses a? Would we just not initialize the variable and leave it undefined? Would we initialize it to the...
What's default HTML/CSS link color?
...link - #FF0000 //red
that was a standard but heavily differs per browser now. (since Nielsen gave it up ;)
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How to implement common bash idioms in Python? [closed]
...I just discovered how to combine the best parts of bash and ipython. Up to now this seems more comfortable to me than using subprocess and so on. You can easily copy big parts of existing bash scripts and e.g. add error handling in the python way :)
And here is my result:
#!/usr/bin/env ipython3
#...