• Gets the index at which the first occurrence of value is found in array using SameValueZero for equality comparisons. If fromIndex is negative, it's used as the offset from the end of array.

    Type Parameters

    • T

    Parameters

    • array: undefined | null | List<T>

      The array to search.

    • value: T

      The value to search for.

    • OptionalfromIndex: number

      The index to search from.

    Returns number

    Returns the index of the matched value, else -1.

    _.indexOf([1, 2, 1, 2], 2);
    // => 1

    // using `fromIndex`
    _.indexOf([1, 2, 1, 2], 2, 2);
    // => 3