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... Kevin BurkeKevin Burke
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Why is string concatenation faster than array join?
... Chrome) uses this code to do string concatenation:
// ECMA-262, section 15.5.4.6
function StringConcat() {
if (IS_NULL_OR_UNDEFINED(this) && !IS_UNDETECTABLE(this)) {
throw MakeTypeError("called_on_null_or_undefined", ["String.prototype.concat"]);
}
var len = %_ArgumentsLength();...
When is it better to use String.Format vs string concatenation?
... |
edited Jul 24 '15 at 14:55
answered Nov 17 '08 at 21:22
...
Convert dd-mm-yyyy string to date
...new Date(from[2], from[1] - 1, from[0])
Use regex
var date = new Date("15-05-2018".replace( /(\d{2})-(\d{2})-(\d{4})/, "$2/$1/$3"))
Why not use regex?
Because you know you'll be working on a string made up of three parts, separated by hyphens.
However, if you were looking for that same string...
node.js hash string?
...ss.argv[2];
var crypto = require('crypto');
var fs = require('fs');
var md5sum = crypto.createHash('md5');
var s = fs.ReadStream(filename);
s.on('data', function(d) {
md5sum.update(d);
});
s.on('end', function() {
var d = md5sum.digest('hex');
console.log(d + ' ' + filename);
});
...
Static variable inside of a function in C
...ntry into foo() to the return from foo(); so it would be re-initialized to 5 on every call.
The keyword static acts to extend the lifetime of a variable to the lifetime of the programme; e.g. initialization occurs once and once only and then the variable retains its value - whatever it has come to ...
Does ruby have real multithreading?
... year that number
will probably go up to four or five.) (Update: it's now 5: MRI, JRuby, YARV (the interpreter for Ruby 1.9), Rubinius and IronRuby).
The first implementation doesn't actually have a name, which
makes it quite awkward to refer to it and is really annoying and
confusing. It is mo...
Is there a rule-of-thumb for how to divide a dataset into training and validation sets?
... for how to best divide data into training and validation sets? Is an even 50/50 split advisable? Or are there clear advantages of having more training data relative to validation data (or vice versa)? Or is this choice pretty much application dependent?
...
How do I know which version of Javascript I'm using?
...edia) keeps a pretty good up-to-date list here.
Most browsers are on 1.5 (though they have features of later versions)
Mozilla progresses with every dot release (they maintain the standard so that's not surprising)
Firefox 4 is on JavaScript 1.8.5
The other big off-the-beaten-path one is IE9 - ...
Access-Control-Allow-Origin Multiple Origin Domains?
...
answered Dec 5 '09 at 0:10
yesthatguyyesthatguy
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