Nodejs String Padding Left padLeft(n, str)

Method Source Code

String.prototype.padLeft = function(n, str) {
  return Array(n - String(this).length + 1).join(str || '0') + this;
}

Related

1. padLeft(count, character)

   String.prototype.padLeft = function(count, character) {
     var ch = character || ' ';
     var result = '';
     for (var i = 0; i < count; i++) {
       result += ch;
     };
     result += this;
     return result;
   

2. padLeft(count, character)

   String.prototype.padLeft = function(count, character) {
       character = character || ' ';
       return character.repeat(count) + this.toString();
   };
   

3. padLeft(length, char)

   String.prototype.padLeft = function(length, char) {
     return Array(length - this.length + 1).join(char || " ") + this;
   };
   

4. padLeft(max, c)

   if (!String.prototype.padLeft) {
     String.prototype.padLeft = function(max, c) {
       var self = this;
       return new Array(Math.max(0, max - self.length + 1)).join(c || ' ') + self;
     };
   

5. padLeft(n, ch)

   String.prototype.padLeft = function(n, ch){
       var s = this;
       while(s.length < n){
           s = ch + s;
       return s;
   

6. padLeft(pad, len)

   String.prototype.padLeft = function (pad, len)
     if (typeof(len) == "undefined") { var len = 0; }
     if (typeof(pad) == "undefined") { var pad = ' '; }
     if (len + 1 >= this.length)
         str = Array(len + 1 - this.length).join(pad) + this;
       return str;
   ...
   

7. padLeft(padString,length)

   String.prototype.padLeft = function(padString,length){
       var str = this;
       while (str.length < length)
           str = padString + str;
       return str;
   

8. padLeft(paddingValue)

   String.prototype.padLeft = function (paddingValue) {
     return String(paddingValue + this).slice(-paddingValue.length);
   };
   

9. padLeft(size, char)

   String.prototype.padLeft = function (size, char) {
       if (size === 0) {
           return '';
       return (Array(size + 1).join(char) + this).slice(-size);
   };