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55c5ddedf4
This reverts commit c4f19465a6
.
37 lines
698 B
JavaScript
37 lines
698 B
JavaScript
function promiseChain(chain, defaultValue = null) {
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let output = new Promise((resolve, reject) => { resolve(defaultValue); });
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for (let i = 0; i < chain.length; i++) {
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let f = chain[i];
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output = output.then(f);
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}
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return output;
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}
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function promiseWhile(callback) {
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let isDone = false;
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function done() {
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isDone = true;
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}
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let iterationDone = false;
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let p = callback(done).then(() => {
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iterationDone = true;
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});
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let iid = setInterval(() => {
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if (iterationDone) {
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if (isDone) {
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clearInterval(iid);
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return;
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}
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iterationDone = false;
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callback(done).then(() => {
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iterationDone = true;
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});
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}
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}, 100);
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}
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module.exports = { promiseChain, promiseWhile }; |