flatten是什么

什么是flatten，Flatten arbitrarily nested arrays into a non-nested list of non-array items

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flatten使用教程帮助文档

flatten

A tiny utility to flatten arrays of arrays (of arrays, etc., recursively, infinitely or to an optional depth) into a single array of non-arrays.

example:

> var flatten = require('flatten');
undefined
> flatten([1, [2, 3], [4, 5, 6], [7, [8, 9]], 10])
[ 1,
  2,
  3,
  4,
  5,
  6,
  7,
  8,
  9,
  10 ]
> flatten([1, [2, [3, [4, [5]]]]], 2)
[ 1,
  2,
  3,
  [ 4, [ 5 ] ] ]

install:

npm install flatten

license:

MIT/X11.