32 lines
637 B
JavaScript
32 lines
637 B
JavaScript
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exports.seq = function(items, generator) {
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var results = [];
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var p = Promise.resolve();
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for(var i = 0, len = items.length; i < len; ++i) {
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p = p.then(generateNextHandler(items[i], i === 0))
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}
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return p.then(function(lastResult) {
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results.push(lastResult);
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return results;
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});
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// Internal helper
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function generateNextHandler(item, ignoreResult) {
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return function(prevResult) {
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if(!ignoreResult) results.push(prevResult);
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return generator(item, prevResult);
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};
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}
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};
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exports.delay = function(delay) {
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return new Promise(function(resolve) {
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setTimeout(resolve, delay);
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});
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};
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