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75 lines
1.9 KiB
JavaScript
75 lines
1.9 KiB
JavaScript
dojo.provide("dojox.lang.functional.object");
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dojo.require("dojox.lang.functional.lambda");
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// This module adds high-level functions and related constructs:
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// - object/dictionary helpers
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// Defined methods:
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// - take any valid lambda argument as the functional argument
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// - skip all attributes that are present in the empty object
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// (IE and/or 3rd-party libraries).
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(function(){
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var d = dojo, df = dojox.lang.functional, empty = {};
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d.mixin(df, {
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// object helpers
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keys: function(/*Object*/ obj){
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// summary: returns an array of all keys in the object
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var t = [];
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for(var i in obj){
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if(!(i in empty)){
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t.push(i);
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}
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}
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return t; // Array
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},
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values: function(/*Object*/ obj){
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// summary: returns an array of all values in the object
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var t = [];
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for(var i in obj){
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if(!(i in empty)){
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t.push(obj[i]);
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}
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}
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return t; // Array
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},
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filterIn: function(/*Object*/ obj, /*Function|String|Array*/ f, /*Object?*/ o){
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// summary: creates new object with all attributes that pass the test
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// implemented by the provided function.
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o = o || d.global; f = df.lambda(f);
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var t = {}, v, i;
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for(i in obj){
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if(!(i in empty)){
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v = obj[i];
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if(f.call(o, v, i, obj)){ t[i] = v; }
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}
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}
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return t; // Object
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},
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forIn: function(/*Object*/ obj, /*Function|String|Array*/ f, /*Object?*/ o){
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// summary: iterates over all object attributes.
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o = o || d.global; f = df.lambda(f);
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for(var i in obj){
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if(!(i in empty)){
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f.call(o, obj[i], i, obj);
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}
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}
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return o; // Object
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},
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mapIn: function(/*Object*/ obj, /*Function|String|Array*/ f, /*Object?*/ o){
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// summary: creates new object with the results of calling
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// a provided function on every attribute in this object.
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o = o || d.global; f = df.lambda(f);
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var t = {}, i;
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for(i in obj){
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if(!(i in empty)){
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t[i] = f.call(o, obj[i], i, obj);
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}
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}
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return t; // Object
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}
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});
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})();
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