Yay, Java!

Doing a validator method for RNA complements:

private static boolean isComplementar(final char a, final char b) {
  boolean s1 = (a == 'A' && b == 'U');
  boolean s2 = (a == 'U' && b == 'A');
  boolean s3 = (a == 'C' && b == 'G');
  boolean s4 = (a == 'G' && b == 'C');
  return (s1 || s2 || s3 || s4);
}

LULZ

If you can use a String instead of chars, you could make the valid complements static final. Then the JVM will intern them and you can legitimately do a == comparison to check if it matches.


public static final String s1 = "AU".intern();
public static final String s2 = "UA".intern();
public static final String s3 = "CG".intern();
public static final String s4 = "GC".intern();

private static final boolean isComplementar(String aPlusB) {
  return (aPlusB == s1 || aPlusB == s2 || aPlusB == s3 || aPlusB == s4)
}

Note the .intern() here is redundant, I just included it for clarity.