In JavaScript, what is the best way to convert a well formatted string ("4,5,7,2") to an array ([4,5,7,2]):
var _intStr="3,5,7,8" → var _intArr=[3,5,7,8]
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Your question is "how do I tokenize a string?"Lightness Races in Orbit– Lightness Races in Orbit2011-05-07 16:04:44 +00:00Commented May 7, 2011 at 16:04
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3 Answers
var _intArr = _intStr.split(",");
One thing worth mentioning is that such value _intStr = "5,,1" will produce array with three items, two are the expected "5" and "1" and one item which is empty string.
Use the split function to split by a string or regex.
var arr = "1,2".split(",");
Now, if you actually want the elements of the resulting array to be numbers instead of strings, you can do something like this:
var arr = [];
"1,2,3,4,5".replace(/(?:'[^]*')|(?:[^, ]+)/g, function(match) {
if (match) {
arr[arr.length] = parseInt(match, 10);
}
});
1 Comment
Shadow2531
Not sure if the regex is perfect or not though.
Ok, thanks all for your helps.
I summarized your help in this way:
String.prototype.toArrInt = function(){
_intStr = this.replace(/^,+|,+(,)|,+$/g, '$1').split(',')
for(var i=0,_intArr=[];i<_intStr.length;_intArr.push(parseInt(_intStr[i++])));
return _intArr;
}
"3,5,6,,5".toArrInt();
Please correct me or improve my final code if is needed. Thanks,
Antonio
1 Comment
Shadow2531
I would do it like this:
String.prototype.toIntArray = function() { var arr = this.replace(/^,+|,+(,)|,+$/g, '$1').split(','); for (var i = 0; i < arr.length; ++i) { arr[i] = parseInt(arr[i], 10); } return arr; };