JavaScript arr.sort array Sort function usage

Source: Internet
Author: User
Tags array sort javascript array

Note that the sort is done on the original array, and no replicas are generated.

For example, an array is [20,17,15,30,100], and the result of the default sort is 100,15,17,20,30. You can see that you don't sort by the size of a number, and if you want to sort by size, you can implement a function yourself, such as:

The code is as follows Copy Code

function Intsort (A, b) {
return a-b;
}

var arr = [20,17,15,30,100];
Arr.sort (Intsort);

or by the way of an anonymous function

Arr.sort (
function (A, b) {
return a-b;
}
);

Reverse order
Arr.sort (Intsort). reverse (); In addition, if you want to arrange in reverse order, you can sort the array first, and then call the reverse method.

Cases

The code is as follows Copy Code

<! DOCTYPE HTML PUBLIC "-//W3C//DTD XHTML 1.0 transitional//en" "Http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd ">
<meta http-equiv= "Content-type" content= "text/html; Charset=utf-8 "/>
<title>javascript Array Ordering </title>
<script type= "Text/javascript" >
s = [
{A: ' Joe ', Last: ' awk '},
{A: ' Zwe ', Last: ' Oli '},
{A: ' Joe ', Last: ' ASP '}
];
for (Var i=0;i<s.length;i++) {
document.write (S[i].first + "" + S[i].last + "<br/>");
}
document.write ("S.sort (function (a,b) {
var result = A.first.localecompare (B.first);
if (result = = 0)
result = A.last.localecompare (b.last);
return result;
})
for (Var i=0;i<s.length;i++) {
document.write (S[i].first + "" + S[i].last + "<br/>");
}
</script>
<body>
</body>

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