2018-7: Unconditionally Shifty
Logical bitwise shifting is a common operation where bits in a fixed width field are moved to the left or right by a specified amount, N, causing N bits to be "shifted out" at one end and N 0's to be filled in at the other end.
For example, shifting the following vector by 3
1 0 1 1 1 0 1 1
would result in
0 0 0 1 0 1 1 1
and shifting by ¯3 would result in
1 1 0 1 1 0 0 0
Write an APL function that given a right argument of a Boolean scalar or vector, and left argument scalar integer of the shift amount, returns an appropriately shifted transformation of the right argument.
Examples:
3 (your_function) 1 0 1 1 1 0 1 1
0 0 0 1 0 1 1 1
¯3 (your_function) 1 0 1 1 1 0 1 1
1 1 0 1 1 0 0 0
5 (your_function) ⍬ ⍝ result is an empty vector
0 (your_function) 1 0 1 1 1 0 1 1
1 0 1 1 1 0 1 1
3 (your_function) 1
0
your_function ←
Solutions
