1 files changed, 35 insertions, 0 deletions
diff --git a/challenge-090/tyler-wardhaugh/lua/ch-1.lua b/challenge-090/tyler-wardhaugh/lua/ch-1.lua
new file mode 100755
index 0000000000..e964ce9f6d
--- /dev/null
+++ b/challenge-090/tyler-wardhaugh/lua/ch-1.lua
@@ -0,0 +1,35 @@
+#!/usr/bin/env lua
+
+local t1 = {}
+local util = require'util'
+
+t1.DEFAULT_DNA = 'GTAAACCCCTTTTCATTTAGACAGATCGACTCCTTATCCATTCTCAGAGATGTGTTGCTGGTCGCCG'
+
+function t1.process_dna(dna)
+  freq = {}
+  for c in dna:gmatch'.' do
+    freq[c] = (freq[c] or 0) + 1
+  end
+
+  local replacement = {A='T', T='A', C='G', G='C'}
+  local complement = dna:gsub('(%w)', function (c) return replacement[c] end)
+
+  return freq, complement
+end
+
+function t1.run(args)
+  local dna = args[1] or t1.DEFAULT_DNA
+  local freq, complement = t1.process_dna(dna)
+
+  io.write('Counts = { ')
+  local seq = util.dict_to_seq(freq)
+  for i, v in ipairs(seq) do
+    io.write(v[1] .. ': ' .. v[2])
+    if i ~= #seq then io.write(', ') end
+  end
+  print(' }\n')
+
+  print('Complement: ' .. complement)
+end
+
+return t1