36 строки
760 B
JavaScript
36 строки
760 B
JavaScript
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/**
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* Create a callback container
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* @return {Object} that wraps callbacks and returns a one-time id.
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*/
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exports.create = function() {
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var lastId = 1,
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callbacks = {};
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return Object.create({}, {
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wrap: {
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value: function(callback) {
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var callbackId = lastId++;
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callbacks[callbackId] = callback || function() {};
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return callbackId;
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}
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},
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processResponse: {
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value: function(callbackId, args) {
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var callback = callbacks[callbackId];
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if (callback) {
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callback.apply(null, args);
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}
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delete callbacks[callbackId];
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}
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},
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removeResponseCallbackEntry: {
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value: function(callbackId) {
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delete callbacks[callbackId];
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}
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}
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});
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};
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