Is there an function that get array of numbers and return ranges?

Question

I hope that, I'm explaining myself right. I need to write a function that gets an array of numbers and returns an array of ranges if there is.

For example:

[1,2,3,5,6,8,9,10] -----> [[1,2,3],[5,6],[8,9,10]]

Show what you have tried so far, explain how it fails and we might be able to help. — connexo, Oct 23 '19 at 12:01
hey Michal, there is no such built-in function. Please show us if you tried anything and we can help you from there. — Gibor, Oct 23 '19 at 12:02
What's the correlation between your input and expected output? — Andy, Oct 23 '19 at 12:02
_“I hope that I'm explaining myself right.”_ - by _just_ explaining what you “need”, you are not even _asking_ right to begin with. This site is not a research service or a code-writing service; we want you to show us what you already tried to solve the problem yourself first of all. Please go read [ask]. — 04FS, Oct 23 '19 at 12:15

score 1 · Accepted Answer · answered Oct 23 '19 at 12:10

You could check the previous value and insert a new array, if the delta is not one.

var array = [1, 2, 3, 5, 6, 8, 9, 10],
    result = array.reduce((r, v, i, { [i - 1]: p }) => {
        if (p === v - 1) r[r.length - 1].push(v);
        else r.push([v]);
        return r;
    }, []);

console.log(result);

Is there an function that get array of numbers and return ranges?

1 Answers1