26 lines
850 B
JavaScript
26 lines
850 B
JavaScript
export function promisify(f, thisContext) {
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return function () {
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const args = Array.prototype.slice.call(arguments);
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return new Promise((resolve, reject) => {
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args.push((err, result) => err !== null ? reject(err) : resolve(result));
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f.apply(thisContext, args);
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});
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};
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}
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export function map(elts, f) {
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const apply = (appElts) => Promise.all(appElts.map((elt) => typeof elt.then === 'function' ? elt.then(f) : f(elt)));
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return typeof elts.then === 'function' ? elts.then(apply) : apply(elts);
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}
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export function _try(f, thisContext) {
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const args = Array.prototype.slice.call(arguments);
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return new Promise((res, rej) => {
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try {
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args.shift();
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res(f.apply(thisContext, args));
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}
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catch (err) {
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rej(err);
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}
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});
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}
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