JavaScript Learning Notes (authoritative guide)

1, the array of the sort () method is alphabetically sorted by default, the following is a chestnut description:
1) All the letters:

var arr =["zu", "Fan", "an", "Peng", "Zhang"];arr.sort (); alert (arr);//result is An,fan,peng,zhang,zu

2) are all numbers:

var arr =["", "" "", "" "", "" 668 "];arr.sort (); alert (arr);//result is 12,34,44,668,67

3) Alpha-numeric combination:

var arr =["A2", "5", "Y7", "6k"];arr.sort (); alert (arr); //result is 34,5,6k,a2,y7 (display sorted by number, then in alphabetical order)

4) the sort () method can be ordered in ascending (descending) Order of the array:

var arr =["", "" "," "", "" "668 "
Arr.sort (function
　　return  A- C; (if replaced with b-a, it is in descending order)

JavaScript Learning Notes (authoritative guide)