public CoOrdinates TransformInstructionToDistance(string instruction)
{
var result = new CoOrdinates();
var direction = instruction[0].ToString();
var distance = Int32.Parse(instruction.Substring(1));
switch (direction)
{
case "R":
result.X = distance;
break;
case "U":
result.Y = distance;
break;
case "L":
result.X = Math.Abs(distance) * (-1);
break;
case "D":
result.Y = Math.Abs(distance) * (-1);
break;
}
return(result);
}
public IEnumerable <string> GetLogFromMultipleInstructionsAsString(CoOrdinates centralPort, string stringOfInstructions)
{
char[] delimiterChars = { ',' };
var instructions = stringOfInstructions.Split(delimiterChars);
var start = new CoOrdinates()
{
X = centralPort.X, Y = centralPort.Y
};
var log = new List <string>();
foreach (var instruction in instructions)
{
IEnumerable <CoOrdinates> result = GetLogFromInstruction(start, instruction).ToList();
log.AddRange(result.Select(x => $"{x.X},{x.Y}"));
start.X = result.Last().X;
start.Y = result.Last().Y;
}
return(log);
}
public IEnumerable <CoOrdinates> GetLogFromInstruction(CoOrdinates startingPoint, string instruction)
{
var convertedInstruction = TransformInstructionToDistance(instruction);
var coOrdinatesLog = new List <CoOrdinates>();
var currentPosition = startingPoint;
var stepsX = convertedInstruction.X;
var stepsY = convertedInstruction.Y;
for (int i = 0; i < (Math.Abs(stepsX + stepsY)); i++)
{
var temporaryLog = new CoOrdinates()
{
X = currentPosition.X, Y = currentPosition.Y
};
if (stepsX > 0)
{
temporaryLog.X = currentPosition.X + 1;
}
else if (stepsX < 0)
{
temporaryLog.X = currentPosition.X - 1;
}
else if (stepsY > 0)
{
temporaryLog.Y = currentPosition.Y + 1;
}
else if (stepsY < 0)
{
temporaryLog.Y = currentPosition.Y - 1;
}
coOrdinatesLog.Add(temporaryLog);
currentPosition = coOrdinatesLog.Last();
}
return(coOrdinatesLog);
}
public Dictionary <string, int> GetLogFromMultipleInstructionsAsDictionary(CoOrdinates centralPort, string instructions)
{
var stringResult = GetLogFromMultipleInstructionsAsString(centralPort, instructions);
return(stringResult.GroupBy(x => x).ToDictionary(x => x.Key, x => x.Count()));
}