Trim or pad string - Node.js String

Node.js examples for String:Padding

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Description

Trim or pad string

Demo Code

(function () {/*from  w w w .j  a v a 2s . c  om*/
  if (!String.prototype.contains) {
    String.prototype.contains = function (searchPattern) {
      var patternLen = searchPattern.length;
      for (var i = 0, length = this.length - patternLen; i < length; i++) {
        var isMatch = true;
        for (var j = 0; j < patternLen; j++) {
          if (searchPattern[j] !== this[i + j]) {
            isMatch = false;
            break;
          }
        }
        if (isMatch) {
          return true;
        }
      }
    }
  }

  if (!String.prototype.toCharArray) {
    String.prototype.toCharArray = function () {
      return this.split("");
    }
  }

  if (!String.prototype.trimLeft) {
    String.prototype.trimLeft = function () {
      return this.replace(/^\s+/, "");
    }
  }
  if (!String.prototype.trimRight) {
    String.prototype.trimRight = function () {
      return this.replace(/\s+$/, "");
    }
  }

  if (!String.prototype.trim) {
    String.prototype.trim = function () {
      return this.trimLeft().trimRight();
    }
  }

  if (!String.prototype.trimLeftChars) {
    String.prototype.trimLeftChars = function (chars) {
      var regEx = new RegExp("^[" + chars + "]+");
      return this.replace(regEx, "");
    }
  }

  if (!String.prototype.trimRightChars) {
    String.prototype.trimRightChars = function (chars) {

      var regEx = new RegExp("[" + chars + "]+$");
      return this.replace(regEx, "");
    }
  }

  if (!String.prototype.trimChars) {
    String.prototype.trimChars = function (chars) {
      return this.trimLeftChars(chars).trimRightChars(chars);
    }
  }

  if (!String.prototype.htmlEscape) {
    String.prototype.htmlEscape = function () {
        return this.replace(/&/g, '&amp;').replace(/</g, '&lt;').replace(/>/g, '&gt;');
    }
  }
  if (!String.prototype.padLeft) {
    String.prototype.padLeft = function (count, char) {
      char = char || " ";
      if (char.length > 1) {
        return String(this);
      }
      if (this.length >= count) {
        return String(this);
      }
      var str = String(this);
      for (var i = 0, thisLen = str.length; i < count - thisLen; i++) {
        str = char + str;
      }
      return str;
    }
  }

  if (!String.prototype.padRight) {
    String.prototype.padRight = function (count, char) {
      char = char || " ";
      if (char.length > 1) {
        return String(this);
      }
      if (this.length >= count) {
        return String(this);
      }
      var str = String(this);
      for (var i = 0, thisLen = this.length; i < count - thisLen; i++) {
        str += char;
      }
      return str;
    }
  }
})();

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