Challenge challenge

Question

In DNA strings, symbols "A" and "T" are complements of each other, as "C" and "G". You have function with one side of the DNA (string, except for Haskell); you need to get the other complementary side. DNA strand is never empty or there is no DNA at all.

DNA_strand ("ATTGC") # return "TAACG"

DNA_strand ("GTAT") # return "CATA"

Answer 1

Here we go

https://code.sololearn.com/c6rDekTKQwJ2/?ref=app

Answer 2

I'd advise you advertise your challenge here for easier reference

https://www.sololearn.com/discuss/583904/?ref=app

Answer 3

I'll do this once I get off work.