CODEWITHSUNDEEP
jquery
Tom Hodder
Tom Hodder

Reputation: 101

Sorting taking case into consideration

I am using the following code

    function asc(a, b) {
        return ($(b).text()) < ($(a).text());
    }

When I pass a,d,c,e,b I get the correct values a,b,c,d,e

However when I pass a,d,C,e,b I get C,a,b,d,e

How can I make the code work when a different Case is used?

Upvotes: 0

Views: 38

Answers (1)

T.J. Crowder
T.J. Crowder

Reputation: 1074595

If you're looking for a case-insensitive sort, the easiest way is to convert both sides to all-upper or all-lower case.

// Note: Not for Array#sort
function asc(a, b) {
    return $(b).text().toLowerCase() < $(a).text().toLowerCase();
}

Note, thought, that I'm assuming you're not using this with Array#sort, as it doesn't do what Array#sort expects (return 0, <0, or >0).

Side note: The () around $(b).text() and $(a).text() in your quoted code have no effect whatsoever, I've removed them above.

From your comment:

if I have to sequence the 'C' after 'c' in the example, how will i do it?

Ah, now that's different. This works for Array#sort, you'll have to modify it to match however you're using asc (I don't know what you expect to do in the case where strings match): Live Copy

// Note: Designed for Array#sort, may need modifying
function asc(a, b) {
    var btext = $(b).text(),
        atext = $(a).text(),
        blc,
        alc;

    if (atext === btext) {
        // Same
        return 0;
    }
    alc = atext.toLowerCase();
    blc = btext.toLowerCase();
    if (alc === blc) {
        // Case-insensitive match, compare case-sensitive and
        // ensure uppercase comes after lowercase.
        return atext < btext ? 1 : -1;
    }

    // Different even ignoring case
    return alc < blc ? -1 : 1;
}

Upvotes: 5

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