/*
Script: Array.js
Contains Array Prototypes like copy, each, contains, and remove.

License:
MIT-style license.
*/

Array.implement({

every: function(fn, bind){
for (var i = 0, l = this.length; i < l; i++){
if (!fn.call(bind, this[i], i, this)) return false;
}
return true;
},

filter: function(fn, bind){
var results = [];
for (var i = 0, l = this.length; i < l; i++){
if (fn.call(bind, this[i], i, this)) results.push(this[i]);
}
return results;
},

clean: function() {
return this.filter($defined);
},

indexOf: function(item, from){
var len = this.length;
for (var i = (from < 0) ? Math.max(0, len + from) : from || 0; i < len; i++){
if (this[i] === item) return i;
}
return -1;
},

map: function(fn, bind){
var results = [];
for (var i = 0, l = this.length; i < l; i++) results[i] = fn.call(bind, this[i], i, this);
return results;
},

some: function(fn, bind){
for (var i = 0, l = this.length; i < l; i++){
if (fn.call(bind, this[i], i, this)) return true;
}
return false;
},

associate: function(keys){
var obj = {}, length = Math.min(this.length, keys.length);
for (var i = 0; i < length; i++) obj[keys[i]] = this[i];
return obj;
},

link: function(object){
var result = {};
for (var i = 0, l = this.length; i < l; i++){
for (var key in object){
if (object[key](this[i])){
result[key] = this[i];
delete object[key];
break;
}
}
}
return result;
},

contains: function(item, from){
return this.indexOf(item, from) != -1;
},

extend: function(array){
for (var i = 0, j = array.length; i < j; i++) this.push(array[i]);
return this;
},

getLast: function(){
return (this.length) ? this[this.length - 1] : null;
},

getRandom: function(){
return (this.length) ? this[$random(0, this.length - 1)] : null;
},

include: function(item){
if (!this.contains(item)) this.push(item);
return this;
},

combine: function(array){
for (var i = 0, l = array.length; i < l; i++) this.include(array[i]);
return this;
},

erase: function(item){
for (var i = this.length; i--; i){
if (this[i] === item) this.splice(i, 1);
}
return this;
},

empty: function(){
this.length = 0;
return this;
},

flatten: function(){
var array = [];
for (var i = 0, l = this.length; i < l; i++){
var type = $type(this[i]);
if (!type) continue;
array = array.concat((type == 'array' || type == 'collection' || type == 'arguments') ? Array.flatten(this[i]) : this[i]);
}
return array;
},

hexToRgb: function(array){
if (this.length != 3) return null;
var rgb = this.map(function(value){
if (value.length == 1) value += value;
return value.toInt(16);
});
return (array) ? rgb : 'rgb(' + rgb + ')';
},

rgbToHex: function(array){
if (this.length < 3) return null;
if (this.length == 4 && this[3] == 0 && !array) return 'transparent';
var hex = [];
for (var i = 0; i < 3; i++){
var bit = (this[i] - 0).toString(16);
hex.push((bit.length == 1) ? '0' + bit : bit);
}
return (array) ? hex : '#' + hex.join('');
}

});