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May 30, 2016 09:43
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flatten an unknown depth array
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| function flatArray (source) { | |
| if (Array.isArray(source)) { | |
| return source.reduce(function (previous, current) { | |
| return previous.concat(flatArray(current)); | |
| }, []) | |
| } | |
| return [source]; | |
| } |
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This practice helps developers to understand array methods. Especially some new ones in ES5.