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.
22 lines
413 B
22 lines
413 B
'use strict';
|
|
module.exports = (iterable, reducer, initVal) => new Promise((resolve, reject) => {
|
|
const iterator = iterable[Symbol.iterator]();
|
|
let i = 0;
|
|
|
|
const next = total => {
|
|
const el = iterator.next();
|
|
|
|
if (el.done) {
|
|
resolve(total);
|
|
return;
|
|
}
|
|
|
|
Promise.all([total, el.value])
|
|
.then(value => {
|
|
next(reducer(value[0], value[1], i++));
|
|
})
|
|
.catch(reject);
|
|
};
|
|
|
|
next(initVal);
|
|
});
|
|
|