corrade-nucleus-nucleons – Rev 36
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module.exports = function parallel(fns, context, callback) {
if (!callback) {
if (typeof context === 'function') {
callback = context
context = null
} else {
callback = noop
}
}
var pending = fns && fns.length
if (!pending) return callback(null, []);
var finished = false
var results = new Array(pending)
fns.forEach(context ? function (fn, i) {
fn.call(context, maybeDone(i))
} : function (fn, i) {
fn(maybeDone(i))
})
function maybeDone(i) {
return function (err, result) {
if (finished) return;
if (err) {
callback(err, results)
finished = true
return
}
results[i] = result
if (!--pending) callback(null, results);
}
}
}
function noop() {}