| 1 | var _ = require("./_");
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| 2 |
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| 3 | module.exports = function (fn, self) {
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| 4 | return function () {
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| 5 | var args, cb, j;
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| 6 | args = 2 <= arguments.length ?
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| 7 | _.slice.call(arguments, 0, j = arguments.length - 1) :
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| 8 | (j = 0, []), cb = arguments[j++];
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| 9 |
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| 10 | var isFn = _.isFunction(cb);
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| 11 |
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| 12 | if (!isFn) {
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| 13 | args.push(cb);
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| 14 | return fn.apply(self, args);
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| 15 | }
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| 16 |
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| 17 | return fn.apply(self, args).then(function (val) {
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| 18 | cb(null, val);
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| 19 | })["catch"](cb);
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| 20 | };
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| 21 | };
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