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findSpliceUndo()
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| // Find, Splice, Undo | |
| function findSpliceUndo(arr, findCallback) { | |
| const idx = arr.findIndex(findCallback) | |
| if (idx < 0) return | |
| const removedArr = arr.splice(idx, 1) | |
| return () => arr.splice(idx, 0, removedArr[0]) | |
| } |
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