You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
39 lines
1.3 KiB
39 lines
1.3 KiB
/*! async-each - MIT License (c) 2016 Paul Miller (paulmillr.com) */
|
|
(function (globals) {
|
|
'use strict';
|
|
var each = function (items, next, callback) {
|
|
if (!Array.isArray(items)) throw new TypeError('each() expects array as first argument');
|
|
if (typeof next !== 'function')
|
|
throw new TypeError('each() expects function as second argument');
|
|
if (typeof callback !== 'function') callback = Function.prototype; // no-op
|
|
|
|
var total = items.length;
|
|
if (total === 0) return callback(undefined, items);
|
|
var transformed = new Array(total);
|
|
var transformedCount = 0;
|
|
var returned = false;
|
|
|
|
items.forEach(function (item, index) {
|
|
next(item, function (error, transformedItem) {
|
|
if (returned) return;
|
|
if (error) {
|
|
returned = true;
|
|
return callback(error);
|
|
}
|
|
transformed[index] = transformedItem;
|
|
transformedCount += 1; // can't use index: last item could take more time
|
|
if (transformedCount === total) return callback(undefined, transformed);
|
|
});
|
|
});
|
|
};
|
|
|
|
if (typeof define !== 'undefined' && define.amd) {
|
|
define([], function () {
|
|
return each;
|
|
}); // RequireJS
|
|
} else if (typeof module !== 'undefined' && module.exports) {
|
|
module.exports = each; // CommonJS
|
|
} else {
|
|
globals.asyncEach = each; // <script>
|
|
}
|
|
})(this);
|
|
|