indexOfOrThrow

indexOfOrThrow(target, value)

Returns the index of the first occurrence of value in target. If value is not found, throws an error.

data-first

indexOfOrThrow([1, 2, 3, 2], 2); // 1
indexOfOrThrow([1, 2, 3], 4); // throws FnError

data-last

pipe([1, 2, 3, 2], indexOfOrThrow(2)); // 1
pipe([1, 2, 3], indexOfOrThrow(4)); // throws FnError