Question

6

JavaScript's sort method handling of capital letters

rated 0 times [ 9] [ 3] / answers: 1 / hits: 15109 / 10 Years ago, tue, february 11, 2014, 12:00:00

Noticed something potentially odd with JavaScript's sort() method. Given the following array:

var arr = ['Aaa',

'CUSTREF',

'Copy a template',

'Copy of Statementsmm',

'Copy1 of Default Email Template',

'Copy11',

'Cust',

'Statements',

'zzzz'];

Calling sort on this array:

console.log(arr.sort());

Yields:

[Aaa, CUSTREF, Copy a template, Copy of Statementsmm, Copy1 of Default Email Template, Copy11, Cust, Statements, zzzz]

Is this correct? ie. CUSTREF is listed first, is this because of it's capital letters?

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turnerf

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4 Years ago

answered 11 Years ago mira · Accepted Answer

That is correct. The strings are being sorted in a binary fashion, using the ordinal values of the characters themselves.

For a case-insensitive sort, try this:

arr.sort(function(a,b) {

    a = a.toLowerCase();

    b = b.toLowerCase();

    if( a == b) return 0;

    return a < b ? -1 : 1;

});