Created
December 20, 2016 04:14
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Javascript Observer pattern
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| function Event() { | |
| this.observers = []; | |
| } | |
| Event.prototype.raise = function (data) { | |
| for (var i in this.observers) { | |
| var item = this.observers[i]; | |
| item.observer.call(item.context, data); | |
| } | |
| }; | |
| Event.prototype.subscribe = function (observer, context) { | |
| var ctx = context || null; | |
| this.observers.push({ | |
| observer: observer, | |
| context: ctx | |
| }); | |
| }; | |
| Event.prototype.unsubscribe = function (observer, context ) { | |
| for (var i in this.observers) { | |
| if ( this.observers[i].observer == observer && this.observers[i].context == context ) { | |
| delete this.observers[i]; | |
| } | |
| } | |
| }; |
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