Array Method Javascript

Posted on 2008-10-17 20:25 | By: ferdhie | Tags: javascript | 0 Comments

Array.prototype.sortNum = function() {
  return this.sort( function (a,b) { return a-b; } );
}

Array.prototype.find = function(searchStr) {
  var returnArray = false;
  for (i=0; i<this.length; i++) {
    if (typeof(searchStr) == 'function') {
      if (searchStr.test(this[i])) {
        if (!returnArray) { returnArray = [] }
        returnArray.push(i);
      }
    } else {
      if (this[i]===searchStr) {
        if (!returnArray) { returnArray = [] }
        returnArray.push(i);
      }
    }
  }
  return returnArray;
}

Array.prototype.map = function(f) {
  var returnArray=[];
  for (i=0; i<this.length; i++) {
    returnArray.push(f(this[i]));
  }
  return returnArray;
}

Object.prototype.isArray = function() {
  return this.constructor == Array;
}

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