Write a function named contains that accepts two arrays a1
and a2 as parameters and that returns a boolean value indicating whether or not
a2's sequence of elements appears in a1 (true for yes,
false for no). The sequence of elements in a2 may appear anywhere in
a1 but must appear consecutively and in the same order. For example, if variables
called a1 and a2 store the following values:
let a1 = [1, 6, 2, 1, 4, 1, 2, 1, 8];
let a2 = [1, 2, 1];
Then the call of contains(a1, a2) should return true because
a2's sequence of values [1, 2, 1] is contained in a1 starting
at index 5. If a2 had stored the values [2, 1, 2], the call of
contains(a1, a2) would return false because a1 does not
contain that sequence of values. Arrays may also include non-integer values, such as doubles or strings.
Anything that would be considered equal using JavaScript's "==" comparison should be considered equivalent
in this function. For example, if variables called a3 and a4> store the
following values:
let a3 = [false, true, "1", 2.0, 3];
let a4 = ["true", 1, "2"];
then the call contains(a3, a4) should return true (note that you don't need to use
the stricter "===" equivalence here, so "1" == 1 is true even though
"1" === 1 is false.
Any two arrays with identical elements are considered to contain each
other, so a call such as contains(a1, a1) should return true.
You may assume that both arrays passed to your function will have lengths of at least 1.
