JS has the same length as English. A character is 1 lengths. So here we need to judge for ourselves and get the actual length of the string.
Core code:
| code is as follows | copy code |
| var = {}; Jmz. GetLength = function (str) { ///<summary> gets the actual length of the string, Chinese 2, English 1</summary> ///<param name= "str" > to get the length of the string </param> var reallength = 0, Len = Str.length, charcode =-1; for (var i = 0; i < len; i++) { charcode = str.c Harcodeat (i); if (charcode >= 0 && charcode <= 128) Reallength + = 1; Else reallength + + 2; } return reallength; }; |
Execute code:
| The code is as follows | Copy Code |
Alert (JMZ. GetLength (' Test test Ceshiceshi '); |
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JS version Get string True length and fixed length string function (compatible Ie,firefox)
| 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>js version gets string true length and fixed-length string functions (compatible Ie,firefox) </title> <body> <script type= "Text/javascript" > Gets the true length of the string (two bytes converted to two single-byte) function Getstractuallen (schars) { Return Schars.replace (/[^x00-xff]/g, "xx"). Length; } Intercept fixed-length substring ssource for string Ilen length function Getinterceptedstr (ssource, Ilen) { if (Ssource.replace (/[^x00-xff]/g, "xx"). Length <= Ilen) { return ssource; } var str = ""; var L = 0; var Schar; for (var i=0; Schar=ssource.charat (i); i++) { str = Schar; L + = (Schar.match (/[^x00-xff]/)!= null? 2:1); if (l >= ilen) { Break } } return str; } var str1= "It is a function of a string intercept, this is a test!"; Alert (GETINTERCEPTEDSTR (str1,29)); </script> </body> |
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