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karl-gustav/flattenArray.js

Created May 3, 2018 10:26
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.reduce() alternative to .flatMap()
Raw
flattenArray.js
const flattenArray = (x, y) => (x || []).concat(y);
// Usage:
[[1,2],[3],[4]].reduce(flattenArray);
// Or:
[[1,2],[3],[4]].reduce((x, y) => (x || []).concat(y));
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