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/*
Copyright (c) 2004-2011, The Dojo Foundation All Rights Reserved.
Available via Academic Free License >= 2.1 OR the modified BSD license.
see: http://dojotoolkit.org/license for details
*/
if(!dojo._hasResource["dojox.lang.functional.array"]){ //_hasResource checks added by build. Do not use _hasResource directly in your code.
dojo._hasResource["dojox.lang.functional.array"] = true;
dojo.provide("dojox.lang.functional.array");
dojo.require("dojox.lang.functional.lambda");
// This module adds high-level functions and related constructs:
// - array-processing functions similar to standard JS functions
// Notes:
// - this module provides JS standard methods similar to high-level functions in dojo/_base/array.js:
// forEach, map, filter, every, some
// Defined methods:
// - take any valid lambda argument as the functional argument
// - operate on dense arrays
// - take a string as the array argument
// - take an iterator objects as the array argument
(function(){
var d = dojo, df = dojox.lang.functional, empty = {};
d.mixin(df, {
// JS 1.6 standard array functions, which can take a lambda as a parameter.
// Consider using dojo._base.array functions, if you don't need the lambda support.
filter: function(/*Array|String|Object*/ a, /*Function|String|Array*/ f, /*Object?*/ o){
// summary: creates a new array with all elements that pass the test
// implemented by the provided function.
if(typeof a == "string"){ a = a.split(""); }
o = o || d.global; f = df.lambda(f);
var t = [], v, i, n;
if(d.isArray(a)){
// array
for(i = 0, n = a.length; i < n; ++i){
v = a[i];
if(f.call(o, v, i, a)){ t.push(v); }
}
}else if(typeof a.hasNext == "function" && typeof a.next == "function"){
// iterator
for(i = 0; a.hasNext();){
v = a.next();
if(f.call(o, v, i++, a)){ t.push(v); }
}
}else{
// object/dictionary
for(i in a){
if(!(i in empty)){
v = a[i];
if(f.call(o, v, i, a)){ t.push(v); }
}
}
}
return t; // Array
},
forEach: function(/*Array|String|Object*/ a, /*Function|String|Array*/ f, /*Object?*/ o){
// summary: executes a provided function once per array element.
if(typeof a == "string"){ a = a.split(""); }
o = o || d.global; f = df.lambda(f);
var i, n;
if(d.isArray(a)){
// array
for(i = 0, n = a.length; i < n; f.call(o, a[i], i, a), ++i);
}else if(typeof a.hasNext == "function" && typeof a.next == "function"){
// iterator
for(i = 0; a.hasNext(); f.call(o, a.next(), i++, a));
}else{
// object/dictionary
for(i in a){
if(!(i in empty)){
f.call(o, a[i], i, a);
}
}
}
return o; // Object
},
map: function(/*Array|String|Object*/ a, /*Function|String|Array*/ f, /*Object?*/ o){
// summary: creates a new array with the results of calling
// a provided function on every element in this array.
if(typeof a == "string"){ a = a.split(""); }
o = o || d.global; f = df.lambda(f);
var t, n, i;
if(d.isArray(a)){
// array
t = new Array(n = a.length);
for(i = 0; i < n; t[i] = f.call(o, a[i], i, a), ++i);
}else if(typeof a.hasNext == "function" && typeof a.next == "function"){
// iterator
t = [];
for(i = 0; a.hasNext(); t.push(f.call(o, a.next(), i++, a)));
}else{
// object/dictionary
t = [];
for(i in a){
if(!(i in empty)){
t.push(f.call(o, a[i], i, a));
}
}
}
return t; // Array
},
every: function(/*Array|String|Object*/ a, /*Function|String|Array*/ f, /*Object?*/ o){
// summary: tests whether all elements in the array pass the test
// implemented by the provided function.
if(typeof a == "string"){ a = a.split(""); }
o = o || d.global; f = df.lambda(f);
var i, n;
if(d.isArray(a)){
// array
for(i = 0, n = a.length; i < n; ++i){
if(!f.call(o, a[i], i, a)){
return false; // Boolean
}
}
}else if(typeof a.hasNext == "function" && typeof a.next == "function"){
// iterator
for(i = 0; a.hasNext();){
if(!f.call(o, a.next(), i++, a)){
return false; // Boolean
}
}
}else{
// object/dictionary
for(i in a){
if(!(i in empty)){
if(!f.call(o, a[i], i, a)){
return false; // Boolean
}
}
}
}
return true; // Boolean
},
some: function(/*Array|String|Object*/ a, /*Function|String|Array*/ f, /*Object?*/ o){
// summary: tests whether some element in the array passes the test
// implemented by the provided function.
if(typeof a == "string"){ a = a.split(""); }
o = o || d.global; f = df.lambda(f);
var i, n;
if(d.isArray(a)){
// array
for(i = 0, n = a.length; i < n; ++i){
if(f.call(o, a[i], i, a)){
return true; // Boolean
}
}
}else if(typeof a.hasNext == "function" && typeof a.next == "function"){
// iterator
for(i = 0; a.hasNext();){
if(f.call(o, a.next(), i++, a)){
return true; // Boolean
}
}
}else{
// object/dictionary
for(i in a){
if(!(i in empty)){
if(f.call(o, a[i], i, a)){
return true; // Boolean
}
}
}
}
return false; // Boolean
}
});
})();
}
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