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So I've got an array that has thousands of values. The delimiter is the same and the content is all numbers. It's a simple array.

Example..

[491353764,202825540,338196858]

Imagine that is 15000 values. I need to split the array into multiple groups of 100 strings.

I got the first 100 fine using this:

ids = ids.toString();
ids = ids.split(',', 100);
console.log(ids.toString());

I know this is basic stuff, but I couldn't find anything that would allow me to split it multiple times into groups. Am I focusing on the wrong thing thinking some version of split will do the job? Do I need to put it through a loop?

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90% accept rate
Are your numbers in an array or a delimited string? – Sahil Muthoo Feb 17 '12 at 16:59
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Do you convert the array to a String on purpose? You could extract the first 100 elements by doing .slice(0,100) which will a. return a new array with the first 100 elements and b. remove those 100 from the original array – m90 Feb 17 '12 at 16:59
@SahilMuthoo The numbers are in that array but have to be converted to groups of 100 strings for the next call. – Brandon Feb 17 '12 at 17:02
@Brandon: Convert them to strings after sliceing the array. – Rocket Hazmat Feb 17 '12 at 17:05
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2 Answers

up vote 4 down vote accepted

I assume you want to store the groups of 100 in another Array...

var ids = [/* your large array of numbers */];

var array_of_sets = [];

while( ids.length ) {
    array_of_sets.push( ids.splice(0, 100) );
}

DEMO: http://jsfiddle.net/rP2Kq/1/

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Storing the 100 in another group of 100 is fine since. I can just convert it to a string from there. Should (id.splice(0,10) ); be 100 instead? – Brandon Feb 17 '12 at 17:04
@Brandon: Yeah, I already updated. That was for my demo that I added, but forgot to change it back to 100 at first. – am not i am Feb 17 '12 at 17:06
...and if you actually want the result to be strings, then do it in the while loop. array_of_sets.push( ids.splice(0, 100).toString() ); – am not i am Feb 17 '12 at 17:07
Perfect, thanks! Then, I can loop through the array_of_sets to make the next call. – Brandon Feb 17 '12 at 17:08
@Brandon: Yes, you can loop over that Array to access each sub-group. – am not i am Feb 17 '12 at 17:10
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up vote 0 down vote 
var ids = [...];

var splitIds = [];
var splitSize = 100;

for (var j = 0; j < ids.length; j += splitSize) {
    splitIds.push(ids.slice(j, j + splitSize));
}
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