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Versions: 262
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Stored size: 1.73 KB
Contents
using System;
using System.Collections.Generic;
using System.Text.RegularExpressions;
public static class Wordy
{
private static readonly Regex VariableAndOperatorGroupsRegex =
new Regex(string.Format(@"{0} {1} {0}\s*{1}*\s*{0}*", @"(-?\d+)", "(plus|minus|multiplied by|divided by)"));
private static readonly Dictionary<string, Func<int, int, int>> Operations = new Dictionary<string, Func<int, int, int>>
{
{ "plus", (x, y) => x + y },
{ "minus", (x, y) => x - y },
{ "multiplied by", (x, y) => x * y },
{ "divided by", (x, y) => x / y },
};
public static int Answer(string question)
{
var parsedProblem = ParseProblem(question);
var firstPass = Operations[parsedProblem.Operation1](parsedProblem.X, parsedProblem.Y);
if (parsedProblem.Operation2.Length == 0)
return firstPass;
return Operations[parsedProblem.Operation2](firstPass, parsedProblem.Z);
}
private static ParsedProblem ParseProblem(string problem)
{
var match = VariableAndOperatorGroupsRegex.Match(problem);
if (match.Groups.Count < 6)
throw new ArgumentException("Invalid problem");
return new ParsedProblem
{
X = int.Parse(match.Groups[1].Value),
Operation1 = match.Groups[2].Value,
Y = int.Parse(match.Groups[3].Value),
Operation2 = match.Groups[4].Value,
Z = match.Groups[5].Success ? int.Parse(match.Groups[5].Value) : 0
};
}
private class ParsedProblem
{
public int X;
public string Operation1;
public int Y;
public string Operation2;
public int Z;
}
}
Version data entries
262 entries across 262 versions & 1 rubygems