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mark code in http://davidwalsh.name/nested-objects
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| var Objectifier = (function() { | |
| // Utility method to get and set objects that may or may not exist | |
| var objectifier = function(splits, create, context) { | |
| var result = context || window; | |
| for(var i = 0, s; result && (s = splits[i]); i++) { | |
| result = (s in result ? result[s] : (create ? result[s] = {} : undefined)); | |
| } | |
| return result; | |
| }; | |
| return { | |
| // Creates an object if it doesn't already exist | |
| set: function(name, value, context) { | |
| var splits = name.split('.'), s = splits.pop(), result = objectifier(splits, true, context); | |
| return result && s ? (result[s] = value) : undefined; | |
| }, | |
| get: function(name, create, context) { | |
| return objectifier(name.split('.'), create, context); | |
| }, | |
| exists: function(name, context) { | |
| return this.get(name, false, context) !== undefined; | |
| } | |
| }; | |
| })(); | |
| // Creates my.namespace.MyClass | |
| Objectifier.set('my.namespace.MyClass', { | |
| name: 'David' | |
| }); | |
| // my.namespace.MyClass.name = 'David' | |
| // Creates some.existing.objecto.my.namespace.MyClass | |
| Objectifier.set('my.namespace.MyClass', { | |
| name: 'David' | |
| }, some.existing.objecto); // Has to be an existing object | |
| // Get an object | |
| Objectifier.get('my.namespace.MyClassToo'); | |
| // Try to find an object, create it if it doesn't exist | |
| Objectifier.get('my.namespace.MyClassThree', true); | |
| // Check for existence | |
| Objectifier.exists('my.namespace.MyClassToo'); // returns TRUE or FALSE |
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