Nodejs String Trim trim2()

Method Source Code

// Alternative//www .  j a  va 2  s . c  o  m

String.prototype.trim2 = function() {
  return this.replace(/^\s+|\s+$/g, '');
};
String.prototype.trim = function() {
  return this.replace(/^\s+/, '').replace(/\s+$/, '');
};

'foo     '.trim(); // 'foo'
'     foo'.trim(); // 'foo'
'  foo   '.trim(); // 'foo'
'foo  bar'.trim(); // 'foo  bar'
'        '.trim(); // ''

Related

1. trim(chars)

   String.prototype.trim = function(chars) {
     return this.replace(new RegExp('^[' + (chars || '\\s') + ']+|[' + (chars || '\\s') + ']+$', 'g'), '');
   };
   

2. trim(fag='default')

   String.prototype.trim = function (fag='default'){
     const preg_arr = {'default':/(^\s*)|(\s*$)/,'left':/(^\s*)/,'right':/(\s*$)/};
     switch(fag){
       case 'left':
         return this.replace(preg_arr.left,'');
       break;
       case 'right':
         return this.replace(preg_arr.right,'');
       break;
   ...
   

3. trim(str)

   String.prototype.trim = function(str) {
     str = str.replace(/^\s+/,'');
     for( var i = str.length - 1 ; i >= 0 ; i--) {
       if(/\S/.test(str.charAt(i))) {
           str = str.substring(0,i+1);
           break;
     return str;
   ...
   

4. trim(str)

   var trim = function (str) {
       return str.replace(/\s*/g, "");
   };
   

5. trim(ws)

   String.prototype.trim = function (ws)
       if(!this.length) return "";
       var tmp = this.stripNL().ltrim().rtrim();
       if(ws) return tmp.replace(/ +/g, ' ');
       else return tmp;
   String.prototype.rtrim = function ()
       if(!this.length) return "";
       return this.replace(/\s+$/g, '');
   String.prototype.ltrim = function ()
       if(!this.length) return "";
       return this.replace(/^\s+/g, '');
   String.prototype.stripNL = function ()
       if(!this.length) return "";
       return this.replace(/[\n\r]/g, '');
   

6. trimBoth(s)

   String.prototype.trimBoth = function(s) {
       return this.replace(new RegExp("^" + s + "+|" + s + "+$", "gm"), "");
   

7. trimChars(charlist)

   String.prototype.trimChars = function(charlist) {
     charlist = charlist || ' \r\n\t';
       var l = 0, i = 0;
       var ret = this;
       l = ret.length;
       for (i = 0; i < l; i++) {
           if (charlist.indexOf(ret.charAt(i)) === -1) {
               ret = ret.substring(i);
               break;
   ...
   

8. trimSlash()

   String.prototype.trimSlash = function () {
       var string = this.trim();
       if (string.charAt(0) == "/") {
           string = string.substring(1);
       if (string.charAt(string.length - 1) == "/") {
           string = string.substring(0, string.length - 1);
       return string;
   ...
   

9. trimSpace()

   'use strict';
   String.prototype.trimSpace = function() {
       var s = this;
       var n = s.length - 1;
       while (n >= 0 && s.charCodeAt(n) == 32) {
           n--;
       return n >= 0 ? s.substr(0, n + 1) : "";
   };
   ...