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aoc2020
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tidy up
continuous-integration/drone/push Build is passing Details

This commit is contained in:
Ben Harris 2021-01-02 12:54:54 -05:00
parent 65dbfd62f0
commit 4b17c629ca
1 changed files with 3 additions and 5 deletions
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8
aoc2020/Day19.cs
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@ -33,7 +33,7 @@ namespace aoc2020
var sub = string.Join("|", _rules[key].Select(test => test.Length switch
{
1 => test[0][0] == '"' ? test[0].Trim('"') : MakeRegexExpression(test[0]),
_ => $"{string.Join(string.Empty, test.Select(MakeRegexExpression))}"
_ => string.Join(string.Empty, test.Select(MakeRegexExpression))
}));
_stack.Pop();
return _rules[key].Length > 1 ? $"({sub})" : sub;
@ -42,8 +42,7 @@ namespace aoc2020
public override string Part1()
{
var exp = new Regex($"^{MakeRegexExpression("0")}$");
var results = _messages.ToLookup(r => exp.IsMatch(r), r => r);
return $"{results[true].Count()}";
return $"{_messages.Count(m => exp.IsMatch(m))}";
}
public override string Part2()
@ -52,8 +51,7 @@ namespace aoc2020
_rules["8"] = new[] {new[] {"42"}, new[] {"42", "8"}};
_rules["11"] = new[] {new[] {"42", "31"}, new[] {"42", "11", "31"}};
var exp = new Regex($"^{MakeRegexExpression("0")}$");
var results = _messages.ToLookup(r => exp.IsMatch(r), r => r);
return $"{results[true].Count()}";
return $"{_messages.Count(m => exp.IsMatch(m))}";
}
}
}