Nodejs String Trim trim(ws)

Method Source Code

/*// w  w  w  . java 2 s  .  com
  stripNL()           - Alle Newlines entfernen
  trim([true/false])  - alle Leerzeichen am Anfang und Ende entfernen m. Parame doppelte einfach machen
  ltrim()             - Leerzeichen Links entfernen
  rtrim()             - Leerzeichen Rechts entfernen

*/
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, '');
}

Related

1. trim(charlist)

   'use strict';
   String.prototype.trim = function (charlist) {
     return this.ltrim(charlist).rtrim(charlist);
   };
   

2. trim(chars)

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

3. 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;
   ...
   

4. 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;
   ...
   

5. trim(str)

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

6. trim2()

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

7. trimBoth(s)

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

8. 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;
   ...
   

9. 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;
   ...