Javascript trying to sort a mixed array numerically

Question

I am trying to sort an array e.g.

arr = ["Joe1,345", "James,1002", "Bill,24"].

I need to order them by number descending but there could be a different amount of numbers on the end. I have tried a bubble sort:

function bubbleSort(a) {
    var swapped;
    do {
        swapped = false;
        for (var i=0; i < a.length-1; i++) {
            if (a[i] > a[i+1]) {
                var temp = a[i];
                a[i] = a[i+1];
                a[i+1] = temp;
                swapped = true;
            }
        }
    } while (swapped);
    return a;
}

But that didn't work - does anyone know how to achieve this? I've looked at other people doing a similar thing but their answers seem to only have a constant letter in front.

Many Thanks

developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/… - use a function that splits on comma: function compareNumbers(a, b) { return a.split(",")[1] - b.split(",")[1]; } — mplungjan
– mplungjan, Commented May 25, 2016 at 9:50
What happens if there are two names with the same number: ['Joe,100', 'Ann,100']? — georg
– georg, Commented May 25, 2016 at 9:54

Nina Scholz · Accepted Answer · 2016-05-25 09:52:35Z

3

You could use Array#sort() with an appropriate callback for this task

var arr = ["Joe1,345", "James,1002", "Bill,24"];

arr.sort(function (a, b) {
    var aa = a.split(','),
        bb = b.split(',');

    return bb[1] - aa[1];
});

console.log(arr);

edited May 25, 2016 at 9:52

answered May 25, 2016 at 9:48

Nina Scholz

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5 Comments

T.J. Crowder Over a year ago

As you once pointed out to me, you don't actually need those unary + operators, as - coerces. (Not saying you should remove them. :-) )

georg Over a year ago

We have console.log now, no need for doc.write anymore!

Nina Scholz Over a year ago

@T.J.Crowder, yes, i was saying that.

Nina Scholz Over a year ago

i know the console, i was requesting a splitter for the small window for resizing.

T.J. Crowder Over a year ago

@NinaScholz: Yeah, for answers like this one I made this request, which canon implemented very quickly; just waiting for SE to add a UI for it.

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