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Array flatten #js #array
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| /** | |
| * @param {Array<any>} arr | |
| */ | |
| function flatten(arr) { | |
| return arr.reduce((flat, toFlatten) => { | |
| return flat.concat(Array.isArray(toFlatten) ? flatten(toFlatten) : toFlatten) | |
| }, []) | |
| } |
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