Iterator for multiple dimension array in javascript

Question

I'm looking for iterator for multiple dimension array that I can iterate through the array easily. For example:

var multipeArrayLike = [[1,[21,22],3,4],[5,6,7,8]]
var iterator = getIterator(multipeArrayLike)

console.log(iterator.next().value) // should return 1 
console.log(iterator.next().value) // should return 21
console.log(iterator.next().value) // should return 22
console.log(iterator.next().value) // should return 3
console.log(iterator.next().value) // should return 4
console.log(iterator.next().value) // should return 5
....
console.log(iterator.next().value) // should return 8

You need to create recursive function which checks for values if values is an array again call this function with that values else if the values is not array return the value; — itzmukeshy7
– itzmukeshy7, Commented Apr 8, 2016 at 7:07

georg · Accepted Answer · 2016-04-08 07:17:48Z

4

You can use a recursive generator in a way similar to this:

'use strict';

function *flat(a) {
    if (!Array.isArray(a)) {
        yield a;
    } else {
        for (let x of a)
            yield *flat(x);
    }
}

var multipeArrayLike = [[1, [21, 22], 3, 4], [5, 6, 7, 8]]


for (let y of flat(multipeArrayLike))
    document.write('<pre>'+JSON.stringify(y,0,3));

edited Apr 8, 2016 at 7:17

answered Apr 8, 2016 at 7:13

georg

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3 Comments

Felix Kling Over a year ago

If you add 'use strict'; to your example, it will run in Chrome (at least the version I have).

georg Over a year ago

@FelixKling: works fine here (49.0.2623.110), but added, thanks.

Felix Kling Over a year ago

Ah, I'm still on 48.0.2564.116. It doesn't allow block scoped variables in non-strict mode. Looks like I should upgrade :D

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