<title> Array's sort () method </title>
<script>
/*
Sort ()
1, does not produce a copy, direct reference to the original array
2. If you call the method without using parameters, the elements in the array are sorted alphabetically.
To be more precise, sorting is done in the order of character encoding.
To do this, you should first convert the elements of the array into strings (if necessary) for comparison.
3, if you want to sort by other standards, you need to provide a comparison function, the function to compare two values,
It then returns a number that describes the relative order of the two values.
The comparison function should have two parameters A and B, and the return value is as follows:
If a is less than B, a value less than 0 is returned in the sorted array before a should appear in B.
If a equals B, it returns 0.
If a is greater than B, a value greater than 0 is returned.
*/
var arr = [2,4,8,1,22,3];
var arrsort= arr.sort ();//not sorted correctly, the array is converted to a string and then sorted
document.write ("The default sort array is:" + arrsort);//1,2,22,3,4,8
document.write ("<br/>");
comparison function
function Mysort (a,b) {
return a-b;
}
var arrSort2 = Arr.sort (mysort);//Incoming comparison function
document.write ("The array of incoming comparison parameters is:" + arrSort2);
document.write ("<br/>");
document.write ("Original array is:" + arr);
</script>
<body>
<div id= "Time" ></div>
</body>
