true
.
Returns the remaining elements in the array.Array.prototype.slice()
to drop the last element of the array until the value returned from func
is true
.const dropRightWhile = (arr, func) => {
let rightIndex = arr.length;
while (rightIndex-- && !func(arr[rightIndex]));
return arr.slice(0, rightIndex + 1);
};
dropRightWhile([1, 2, 3, 4], n => n < 3); // [1, 2]
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