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Discussion on: Daily Challenge #175 - Complementary DNA

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Ruan Engelbrecht •

JavaScript:

const mapping = {
  A: 'T',
  T: 'A',
  C: 'G',
  G: 'C'
};

const DNA_strand = seq =>
  seq
    .split('')
    .map(x => mapping[x])
    .join('');