JS must have

gistfile1.js

if(typeof console === "undefined") {
    console = { log: function() { } };
}

// Reduce

if (!Array.prototype.reduce)  
{  
  Array.prototype.reduce = function(fun /*, initial*/)  
  {  
    var len = this.length >>> 0;  
    if (typeof fun != "function")  
      throw new TypeError();  
  
    // no value to return if no initial value and an empty array  
    if (len == 0 && arguments.length == 1)  
      throw new TypeError();  
  
    var i = 0;  
    if (arguments.length >= 2)  
    {  
      var rv = arguments[1];  
    }  
    else  
    {  
      do  
      {  
        if (i in this)  
        {  
          var rv = this[i++];  
          break;  
        }  
  
        // if array contains no values, no initial value to return  
        if (++i >= len)  
          throw new TypeError();  
      }  
      while (true);  
    }  
  
    for (; i < len; i++)  
    {  
      if (i in this)  
        rv = fun.call(undefined, rv, this[i], i, this);  
    }  
  
    return rv;  
  };  
}

// Trim

function trim(s) {
  return ( s || '' ).replace( /^\s*|\s*$/g, '' );
};

String.prototype.trim = function(){
  return trim(this);
};

// Truncate

function truncate(string, length) {
  if (string.length > length) {
    return string.slice(0, length - 3) + "...";
  } else {
    return string;
  }
};

String.prototype.truncate = function(length){
  return truncate(this, length);
};

// Camelize

String.prototype.camelize = function(){
  return this.replace(/(?:^|[-_])(\w)/g, function (_, c) {
    return c ? c.toUpperCase () : '';
  });
};

String.prototype.camelizeVar = function(){
  var camelized = this.camelize();
  var firstLetter = camelized[0].toLowerCase();
  return camelized.replace(/^./, firstLetter);
};

// Array intersection

Array.prototype.contains = function(elem) {
    return(this.indexOf(elem) > -1);
};

Array.prototype.intersect = function( array ) {
    // this is naive--could use some optimization
    var result = [];
    for ( var i = 0; i < this.length; i++ ) {
        if ( array.contains(this[i]) && !result.contains(this[i]) )
            result.push( this[i] );
    }
    return result;
};

// Prepend http://jsfiddle.net/fUcEr/ (VDTonton)

Array.prototype.prepend = function(item){
    this.splice(0, 0, item);
};