Sort array of strings by integer (which is the first character)

Question

I am wondering how should be the easy way to solve this problem.

I have an array of strings, something like this:

Array [ "15 Some string", "16 Some string", "13 Some string", "11 Some string", "6 Some string", "8 Some string", "12 Some string", "5 Some string", "9 Some string", "10 Some string" ]

And I would like to sort it by integer, which is the first character of this array (and will be every time), using javascript. My desired output would be:

Array [ "16 Some string", "15 Some string", "13 Some string", "12 Some string", "11 Some string", "10 Some string", "9 Some string", "8 Some string", "6 Some string", "5 Some string" ]

Anyone can help?

Thomas · Accepted Answer · 2018-03-25 18:35:57Z

4

How about simply parsing the string values to numbers

var array = ["15 Some string", "16 Some string", "13 Some string", "11 Some string", "6 Some string", "8 Some string", "12 Some string", "5 Some string", "9 Some string", "10 Some string"];

array.sort((a, b) => parseFloat(b) - parseFloat(a));

console.log(array);

.as-console-wrapper { max-height: 100% !important; top: 0; }

answered Mar 25, 2018 at 18:35

Thomas

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Suren Srapyan · Accepted Answer · 2018-03-25 18:27:43Z

2

Use regex to get the numbers and after it compare the numbers.

const array = [ "15 Some string", "16 Some string", "13 Some string", "11 Some string", "6 Some string", "8 Some string", "12 Some string", "5 Some string", "9 Some string", "10 Some string" ];

array.sort((a,b) => b.match(/\d+/g) - a.match(/\d+/g));

console.log(array);

answered Mar 25, 2018 at 18:27

Suren Srapyan

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2 Comments

lazarkoo Over a year ago

Amazing! Thank you very much. This helped me.

Suren Srapyan Over a year ago

Are you sure, that you answer only no duplicated questions ?

Nina Scholz · Accepted Answer · 2018-03-25 18:47:11Z

1

You could match the starting integer value and sort by the delta of it.

function getN(s) {
    return s.match(/^\d+/);
}

var array = ["15 Some string", "16 Some string", "13 Some string", "11 Some string", "6 Some string", "8 Some string", "12 Some string", "5 Some string", "9 Some string", "10 Some string"];

array.sort(function (a, b) {
    return getN(b) - getN(a);
});

console.log(array);

.as-console-wrapper { max-height: 100% !important; top: 0; }

edited Mar 25, 2018 at 18:47

answered Mar 25, 2018 at 18:27

Nina Scholz

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