Javascript--array Array Objects

Array method:

About Slice:

About Sort:

"Arrayobject.sort (Method function)

Method functions: Optional, specifies the sort order, which must be a function.

• If the < method function is not specified, it is sorted in Unicode code order;
• If the < method function is specified, the sorting method is sorted by the < method function > specified.

"Method function:

The function compares two values and returns a number that describes the relative order of the two values.

The comparison function should have two parameters, a, B, and its return value is as follows:

• A return value of <=-1 indicates that a appears before B in the sorted sequence.
• If the return value is >-1&&<1, then A and B have the same sort order.
• A return value of >=1 indicates that a appears after B in the sorted sequence.

For example

<script type= "Text/javascript" >    function Sortnum (A, a) {return a-B        ;        Ascending, if descending, then change "A-B" to "B-a"    }    var myarr = new Array ("Z", "+", "" "," 6 "," + "," 1 ");    document.write (Myarr + "<br>");    document.write (Myarr.sort (sortnum));</script>

　　

Javascript--array Array Objects