Question

i want to split an array into a list of subarray by a/or more given seperator/s.

something like this:

var myArray = [null, 5, 'whazzup?', object, '15', 34.6];
var mySeperators = [null, '15'];

splitArray(myArray, mySeperators)

should result in that:

[[], [5, 'whazzup?', object], [34.6]]

the source array can contain the seperators multiple times. how to accomplish this?

when it makes solution easier, i’m using mootools as base library.

Answer 1

Given ECMAScript 5, it is possible to accomplish this with the use of Array#reduce:

myArray.reduce(function(currentArrays, nextItem) {
    if(~mySeparators.indexOf(nextItem))
        currentArrays.push([]);
    else
        currentArrays[currentArrays.length - 1].push(nextItem);

    return currentArrays;
}, [[]]);

I have no experience with MooTools; however, it appears to polyfill Array#reduce, if backwards-compatibility is required.