Javascript function that converts array to array of "2-tuples" [duplicate]

Question

How do I write a javascript function that takes an array as its input [0, 1, 2, 3, 4, 5, 6, 7, 8] and returns [ [0, 1], [2, 3], [4, 5], [6, 7], [8] ]?

jsfiddle.net/uxqwzvcj/1

osmanraifgunes
– osmanraifgunes

2016-05-17 08:20:14 +00:00
Commented May 17, 2016 at 8:20 — osmanraifgunes
– osmanraifgunes, Commented May 17, 2016 at 8:20

Nina Scholz · Accepted Answer · 2016-05-17 08:14:07Z

3

You could use Array#reduce and the index for grouping the parts.

var array = [0, 1, 2, 3, 4, 5, 6, 7, 8],
    result = array.reduce(function (r, a, i) {
        if (i % 2) {
            r[r.length - 1].push(a);
        } else {
            r.push([a]);
        }
        return r;
    }, []);

document.write('<pre>' + JSON.stringify(result, 0, 4) + '</pre>');

answered May 17, 2016 at 8:14

Nina Scholz

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