Boolean Chain

Write three functions:

1. AND
2. OR
3. XOR

These functions should evaluate an array of true and false values, starting from the leftmost element and evaluating pairwise.

Examples

and([true, true, false, true]) ➞ false
// and([true, true, false, true]) => and([true, false, true]) => and([false, true]) => false

or([true, true, false, false]) ➞ true
// or([true, true, false, true]) => or([true, false, false]) => or([true, false]) => true

xor([true, true, false, false]) ➞ false
// xor([true, true, false, false]) => xor([false, false, false]) => xor([false, false]) => false

Notes

• XOR is the same as OR, except that it excludes [true, true].
• Each time you evaluate an element at 0 and at 1, you collapse it into the single result.