Purpose: Calculate the length of the string (1 character in English and 2 characters in Chinese)
Method 1:
The code copy is as follows:
String.prototype.gblen = function() {
var len = 0;
for (var i=0; i<this.length; i++) {
if (this.charCodeAt(i)>127 || this.charCodeAt(i)==94) {
len += 2;
} else {
len ++;
}
}
return len;
}
Method 2:
The code copy is as follows: function strlen(str){
var len = 0;
for (var i=0; i<str.length; i++) {
var c = str.charCodeAt(i);
//Single byte plus 1
if ((c >= 0x0001 && c <= 0x007e) || (0xff60<=c && c<=0xff9f)) {
len++;
}
else {
len+=2;
}
}
return len;
}
Method 3:
The code copy is as follows: var jmz = {};
jmz.GetLength = function(str) {
///<summary>Get the actual length of the string, Chinese 2, English 1</summary>
///<param name="str">To get a string of length</param>
var realLength = 0, len = str.length, charCode = -1;
for (var i = 0; i < len; i++) {
charCode = str.charCodeAt(i);
if (charCode >= 0 && charCode <= 128) realLength += 1;
else realLength += 2;
}
return realLength;
};
Method 4:
The code copy is as follows: var l = str.length;
var blend = 0;
for(i=0; i<l; i++) {
if ((str.charCodeAt(i) & 0xff00) != 0) {
blen ++;
}
blen ++;
}
Method 5:
Replace the double byte with two single bytes and then get the length
Copy the code as follows: getBLen = function(str) {
if (str == null) return 0;
if (typeof str != "string"){
str += "";
}
return str.replace(/[^/x00-/xff]/g,"01").length;
}