comparing 2 strings alphabetically for sorting purposes

Question

I m trying to compare 2 strings alphabetically for sorting purposes  For example I want to have a boolean check like if  aaaa   lt   ab    I tried it  but it s not giving me correct results  so I guess that s not the right syntax  How do I do this in jquery or Javascript

User · Answer

You do say that the comparison is for sorting purposes. Then I suggest instead:

"a".localeCompare("b");

It returns -1 since "a" < "b", 1 or 0 otherwise, like you need for Array.prototype.sort()

Keep in mind that sorting is locale dependent. E.g. in German, ä is a variant of a, so "ä".localeCompare("b", "de-DE") returns -1. In Swedish, ä is one of the last letters in the alphabet, so "ä".localeCompare("b", "se-SE") returns 1.

Without the second parameter to localeCompare, the browser's locale is used. Which in my experience is never what I want, because then it'll sort differently than the server, which has a fixed locale for all users.

User · Answer

Lets say that we have an array of objects     name   String     then we can sort our array as follows   array sort function a  b        var orderBool   a name  gt  b name      return orderBool   1   -1        Note  Be careful for upper letters  you may need to cast your string to lower case due to your purpose

User · Answer

a  localeCompare  b   should actually return -1 since a sorts before b  http   www w3schools com jsref jsref localecompare asp

User · Answer

Just remember that string comparison like  x     X  is case-sensitive   aa   lt   ab    true  aa   lt   Ab    false   You can use  toLowerCase   to compare without case sensitivity

User · Answer

Lets look at some test cases - try running the following expressions in your JS console    a   lt   b    aa   lt   ab    aaa   lt   aab    All return true   JavaScript compares strings character by character and  a  comes before  b  in the alphabet - hence less than    In your case it works like so -      1    a aaa   lt    a b    compares the first two  a  characters - all equal  lets move to the next character      2     a a  aa   lt   a b        compares the second characters  a  against  b  - whoop   a  comes before  b   Returns true

[javascript] comparing 2 strings alphabetically for sorting purposes

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