2017-8: Be the First 1
Write a dfn that takes a Boolean vector or scalar and “turns off” all the 1s after the first 1.
Examples:
(your_function) 0 1 0 1 0 0 1
0 1 0 0 0 0 0
(your_function) ⍬ ⍝ should return an empty vector
(your_function) 0 0 0 0 ⍝ no 1's? no problem!
0 0 0 0
your_function ←
Solutions

