chris
746868d720
git-subtree-dir: main-site git-subtree-mainline: 4d1daa39101c0a85ca6d916f1c31139faf39632a git-subtree-split: 5cefb4d1618bc54ae0e86830421a8c911900302c
41 lines
773 B
JavaScript
41 lines
773 B
JavaScript
module.exports = function parallel(fns, context, callback) {
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if (!callback) {
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if (typeof context === 'function') {
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callback = context
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context = null
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} else {
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callback = noop
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}
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}
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var pending = fns && fns.length
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if (!pending) return callback(null, []);
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var finished = false
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var results = new Array(pending)
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fns.forEach(context ? function (fn, i) {
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fn.call(context, maybeDone(i))
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} : function (fn, i) {
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fn(maybeDone(i))
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})
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function maybeDone(i) {
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return function (err, result) {
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if (finished) return;
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if (err) {
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callback(err, results)
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finished = true
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return
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}
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results[i] = result
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if (!--pending) callback(null, results);
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}
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}
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}
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function noop() {}
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