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Challenges

Comments on Backspace an array

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Backspace an array

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Challenge

Given an array consisting of positive integers and 0s, return it with 0s acting like backspaces.

Leading backspaces do nothing, and more backspaces than elements also does nothing.

Credit: A comment on this video

Test Cases

[0,0,0,0,0,5,7] -> [5,7]
[1,2,0,3] -> [1,3]
[1,5,5,0,2,0,0,8] -> [1,8]
[1,2,3,4,0,0,9] -> [1,2,9]
[1,2,0,0,0,0,0] -> []
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General comments (4 comments)
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Jelly, 6 bytes

ṣ0Ṗ;¥/

Try it online!

How it works

ṣ0Ṗ;¥/ - Main link. Takes a list on the left
ṣ0     - Split at zeroes
    ¥/ - Reduce by:
  Ṗ    -   Remove the last element
   ;   -   Concatenate
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General comments
Razetime‭ wrote over 3 years ago