Mr-Xcoder

List of 05AB1E challenges

This Gist will contain challenges of varying difficulty, involving features that are somewhat specific to 05AB1E, for people to try out. The contents of this will then be added to The 05AB1E Lounge, where they will have their own tab.

• Given a list of integers, return the longest prefix with the maximal mode. In case two or more elements of a prefix occur the maximal number of times, select the highest one. Current record: 7 bytes. Test cases:

  [-5, -3, -5, 3, 6, -5]            -> [-5, -3]
  [5, 3, 9, 4, 4, 9, 5, 6, 6, 4]    -> [5, 3, 9, 4, 4, 9, 5, 6, 6]
  [5, 9, 3, 7, 3, 9, 4, 3, 0, 8, 4] -> [5, 9, 3, 7, 3, 9, 4]
  

Mr-Xcoder

Best of PPCG 2017!

To be rewarded (1)

Kansas City Shuffle: Golf a transcendental number by xnor

Will be rewarded by totallyhuman.

Currently being rewarded (1)

Overall best challenge: Formic Functions: Queen of the Hill by trichoplax

Mr-Xcoder

You have a list of elements a₁, a₂, ..., a_n. Now what is the sum of their deltas? You have the following items to sum:

• a₂ - a₁
• a₃ - a₂
• ...
• a_n - a_{n - 1}

What do you get by summing them?

(a₂ - a₁) + (a₃ - a₂) + ... + (a_n - a_{n - 1}) = a₂ - a₁ + a₃ - a₂ + ... + a_n - a_{n - 1}. What does that equal? -a₁ + a_n