Question

I was working with this and came across a new problem as I needed to incorporate a jagged array, so I tried modifying this code like so..

string y = "{10} red30, {20} blue12, {30} green90, {40} yellow13 : {15} axe,  
     {25} frog, {33} sandwich, {55} spinach : ...." and so on. 

int[][] Odds = y.Split(':').Select(t => Regex.Matches(t, @"(?<={)\d+(?=})"))  
    .Cast<Match>() .Select(m => int.Parse(m.Value)) .ToArray();

with a new string that had a “:” as a separator between each new array. it gives me the error of “cannot implicitly convert type ‘int[]’ to ‘int[][]’

Answer 1

That’s beccause the Matches method doesn’t return a Match object, it returns a MatchCollection object. You have to get the Match objects from each collection and parse the values, then you can turn those into an array:

int[][] Odds =
  y.Split(':')
  .Select(t => Regex.Matches(t, @"(?<={)\d+(?=})"))
  .Cast<MatchCollection>()
  .Select(
    m => m.Cast<Match>()
     .Select(n => int.Parse(n.Value))
     .ToArray()
  )
  .ToArray();