Nodejs String Padding Left padLeft(ch, n)

Method Source Code

String.prototype.padLeft = function(ch, n) {
  if(this.length < n) {
    var diff = n - this.length;
    var tempArr = this.split('');
    var tmp;/*from w  ww  .ja  v a2  s.c  o m*/
    for(var i = 0; i < diff; i++) {
      tempArr.unshift(ch);
    }
    tmp = tempArr.toString().replace(/,/g, '');
    return tmp;
  }  else if(parseInt(this).toString() !== 'NaN'){
    return parseInt(this);
  } else {
    return this;
  }
};

Related

1. padL(width, pad)

   String.repeat = function(chr, count) {
     var str = "";
     for (var x = 0; x < count; x++) {
       str += chr;
     return str;
   };
   String.prototype.padL = function(width, pad) {
     if (!width || width < 1)
   ...
   

2. padLeft( length, padding )

   Math.TO_DEGREES = 180 / Math.PI;
   Math.TO_RADIANS = Math.PI / 180;
   String.prototype.padLeft = function( length, padding )
       return Array( length - this.length + 1 ).join( padding || '0' ) + this;
   };
   

3. padLeft( pPadChar, pTotalLength )

   String.prototype.padLeft = function( pPadChar, pTotalLength )
     return ( pTotalLength <= this.length ) ? this :
       ( pPadChar + this ).padLeft(pPadChar, pTotalLength);
   };
   

4. padLeft(c, length)

   String.prototype.padLeft = function(c, length) {
       var str = this;
       while (str.length < length)
           str = c + str;
       return str;
   function formatDuration (duration) {
       var totalSeconds = Math.floor(duration);
       var minutes = Math.floor(totalSeconds / 60);
   ...
   

5. padLeft(ch, n)

   'use strict';
   String.prototype.padLeft = function(ch, n) {
     let myString = '';
     while(myString.length < n - this.length) {
       myString += ch;
     myString += this;
     return myString;
   };
   ...
   

6. padLeft(char, length)

   String.prototype.padLeft = function (char, length) {
       var len = this.length;
       if (len === 0) return '';
       var str = this;
       while (len < length) {
           str = char + str;
           len++;
       return str;
   ...
   

7. padLeft(character, length)

   'use strict';
   String.prototype.padLeft = function (character, length)  {
     return character.repeat(Math.max(0, length - this.length)) + this;
   };
   

8. padLeft(character, length)

   'use strict';
   String.prototype.padLeft = String.prototype.padLeft || function (character, length) {
     return character.repeat(Math.max(0, length - this.length)) + this;
   };
   

9. padLeft(count, ch)

   String.prototype.padLeft = function(count, ch) {
        var char = ch || ' ';
        var result = new Array(count + 1).join(char);
        return result + this;
    };