blob: 653920463c8f1a77eac390d9b04c3a7603ac014d [file] [log] [blame]
var defer = function () {
var pending = [], value;
return {
resolve: function (_value) {
if (pending) {
value = _value;
for (var i = 0, ii = pending.length; i < ii; i++) {
var callback = pending[i];
callback(value);
}
pending = undefined;
} else {
throw new Error("A promise can only be resolved once.");
}
},
then: function (callback) {
if (pending) {
pending.push(callback);
} else {
callback(value);
}
}
}
};