CODEWITHSUNDEEP
erlang
Andriy Drozdyuk
Andriy Drozdyuk

Reputation: 61121

Error function_clause?

Why is this not working? Can't figure this out. Seems to be something with the way strings are matched. I keep getting an error error:function_clause.

-module(rna_transcription).
-export([to_rna/1, to_rna_nucleotide/1]).

to_rna(DNA) -> lists:map(fun to_rna_nucleotide/1, DNA).

to_rna_nucleotide("G") -> "C";
to_rna_nucleotide("C") -> "G";
to_rna_nucleotide("T") -> "A";
to_rna_nucleotide("A") -> "U".

Upvotes: 6

Views: 3279

Answers (1)

user4651282
user4651282

Reputation:

The element of string is of type char, not string. 

to_rna_nucleotide($G) -> $C;
to_rna_nucleotide($C) -> $G;
to_rna_nucleotide($T) -> $A;
to_rna_nucleotide($A) -> $U.

Upvotes: 5

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