Created
January 15, 2019 21:57
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JS Bin // source https://jsbin.com/tejajul
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <meta name="viewport" content="width=device-width"> | |
| <title>JS Bin</title> | |
| </head> | |
| <body> | |
| <script id="jsbin-javascript"> | |
| /** | |
| * Асинхронный reduce | |
| * @param {any[]} input | |
| * @param {Function} iterator | |
| * @param {any} initialValue | |
| * @return {Promise} | |
| */ | |
| function asyncReduce(input, iterator, initialValue) { | |
| let array = input.map(item => item()); | |
| return Promise.all(array).then(results => { | |
| let acc = initialValue; | |
| results.forEach(function(item, i, array) { | |
| acc = iterator(acc, item); | |
| }); | |
| return acc; | |
| }); | |
| } | |
| let a = () => Promise.resolve("a"); | |
| let b = () => Promise.resolve("b"); | |
| let c = () => new Promise(resolve => setTimeout(() => resolve("c"), 100)); | |
| asyncReduce([a, c, b], (acc, value) => [...acc, value], ["d"]).then(results => { | |
| console.log(results); // ['d', 'a', 'c', 'b']; | |
| }); | |
| </script> | |
| <script id="jsbin-source-javascript" type="text/javascript">/** | |
| * Асинхронный reduce | |
| * @param {any[]} input | |
| * @param {Function} iterator | |
| * @param {any} initialValue | |
| * @return {Promise} | |
| */ | |
| function asyncReduce(input, iterator, initialValue) { | |
| let array = input.map(item => item()); | |
| return Promise.all(array).then(results => { | |
| let acc = initialValue; | |
| results.forEach(function(item, i, array) { | |
| acc = iterator(acc, item); | |
| }); | |
| return acc; | |
| }); | |
| } | |
| let a = () => Promise.resolve("a"); | |
| let b = () => Promise.resolve("b"); | |
| let c = () => new Promise(resolve => setTimeout(() => resolve("c"), 100)); | |
| asyncReduce([a, c, b], (acc, value) => [...acc, value], ["d"]).then(results => { | |
| console.log(results); // ['d', 'a', 'c', 'b']; | |
| });</script></body> | |
| </html> |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| /** | |
| * Асинхронный reduce | |
| * @param {any[]} input | |
| * @param {Function} iterator | |
| * @param {any} initialValue | |
| * @return {Promise} | |
| */ | |
| function asyncReduce(input, iterator, initialValue) { | |
| let array = input.map(item => item()); | |
| return Promise.all(array).then(results => { | |
| let acc = initialValue; | |
| results.forEach(function(item, i, array) { | |
| acc = iterator(acc, item); | |
| }); | |
| return acc; | |
| }); | |
| } | |
| let a = () => Promise.resolve("a"); | |
| let b = () => Promise.resolve("b"); | |
| let c = () => new Promise(resolve => setTimeout(() => resolve("c"), 100)); | |
| asyncReduce([a, c, b], (acc, value) => [...acc, value], ["d"]).then(results => { | |
| console.log(results); // ['d', 'a', 'c', 'b']; | |
| }); |
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