var reduceRight = function(array, callbackfn, initialValue){
if(array.reduceRight){
return array.reduceRight(callbackfn, current)
}
if (!Base.isFunction(callbackfn))
Base.error(callbackfn + " is not a function");
// Pull out the length so that modifications to the length in the
// loop will not affect the looping.
var i = array.length - 1,
current;
find_initial:
if (arguments.length < 2){
for (; i >= 0; i--){
current = array[i];
if (current !== undefined || i in array){
i--;
break find_initial;
}
}
Base.error("reduce of empty array with no initial value");
}
for (; i >= 0; i--){
var element = array[i];
if (element !== undefined || i in array){
current = callbackfn.call(null, current, element, i, array);
}
}
return current;
};
var forEach = function(array, callbackfn, thisArg){
if(array.forEach){
return array.forEach(callbackfn, thisArg);
}
if (!Base.isFunction(callbackfn))
Base.error(callbackfn + " is not a function");
// Pull out the length so that modifications to the length in the
// loop will not affect the looping.
var len = array.length;
for (var i = 0; i < len; ++i){
var current = array[i];
if (current !== undefined || i in array){
callbackfn.call(thisArg, current, i, array);
}
}
};
var map = function(array, callbackfn, thisArg){
if(array.map){
return array.map(callbackfn, thisArg);
}
if (!Base.isFunction(callbackfn))
Base.error(callbackfn + " is not a function");
// Pull out the length so that modifications to the length in the
// loop will not affect the looping.
var len = array.length,
result = new Array(len);
for (var i = 0; i < len; ++i){
var current = array[i];
if (current !== undefined || i in array){
result[i] = callbackfn.call(thisArg, current, i, array);
}
}
return result;
};