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WaldoJeffers/filter_async_without_conductor.js

Created May 26, 2018 16:20
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Filter an array using an asynchronous predicate
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filter_async_without_conductor.js
const numbers = [3, 1, 4]
const isEven = x => Promise.resolve(x => x % 2 === 0)
const result = await Promise
.all(numbers.map(isEven)))
.then(results => numbers.filter((_, index) => results[index]))
// [4]
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