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A JavaScript TC39 Proposal for getting the last element from an array ... [myIndex-1] // oops, overcooked index, returns last-but-one not last, scratch head for hours from silly mistake. High Level ...
The findLastIndex() method is an iterative method.It calls a provided callbackFn function once for each element in an array in descending-index order, until callbackFn returns a truthy value.
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