JS Sort: Use of the Localecompare () method

Definition: Compares two strings in a local-specific order.

Grammar:stringObject.localeCompare(target)

Parameters: target--The string to be compared with stringobject in a local-specific order.

Return value: A number that describes the result of the comparison.

(1) If Stringobject is less than target, Localecompare () returns a number less than 0.

(2) If Stringobject is greater than target, the method returns a number greater than 0.

(3) If two strings are equal, or if there is no difference based on local collation, the method returns 0.

Description: When you apply the < and > operators to Strings, they compare strings with only Unicode encoding of characters, regardless of local collation. The order generated in this way is not necessarily correct. The Localecompare () method provides a way to compare strings, taking into account the default local collation. The ECMAscript standard does not specify how to perform local-specific comparison operations, it only specifies that the function takes the collation provided by the underlying operating system.

Instance: You can use the Localecompare () method to sort Chinese alphabetically by pinyin, which is quite simple

 var  array = [ "  dove   ", "   Sparrow   ", "   elephant   ", "   dog   ", "   cat   ", "   chicken   " ];array  = Array.Sort (function comparefunction ( Item1, item2) { return   Item1.localecompare    (ITEM2); });

The results are shown as:

[" pigeon "" elephant  " " dog "" Chicken"  " Sparrow  " " cat "

And the following code can be implemented in Chinese according to phonetic sorting, and can be Chinese according to A,b,c,d ... Be differentiated. The code is as follows:

JS Sort: Use of the Localecompare () method