Getting wrong range of numbers

December 7, 2022

Given the pair of 2 strings "2-4,6-8" I want to separate these 2 pairs and find all numbers between those range.
So first pair 2-4 should return me 2, 3, 4
Second pair 6-8 should return 6, 7, 8

I tried below code

 var splittedString = ln.Split(",");
 var firstPair = splittedString[0];
 var secondPair = splittedString[1];
 var splittedFirstPair = firstPair.Split("-");

 IEnumerable<int> firsPairRange = Enumerable.Range(
   Convert.ToInt32(splittedFirstPair[0]), 
   Convert.ToInt32(splittedFirstPair[1]));

 var splittedSecondPair = secondPair.Split("-");

 IEnumerable<int> secondPairRange = Enumerable.Range(
   Convert.ToInt32(splittedSecondPair[0]), 
   Convert.ToInt32(splittedSecondPair[1]));

But the variable firsPairRange gives me output 2,3,4,5 and the variable secondPairRange gives me output 6,7,8,9,10,11,12,13

I don’t understand why and how to fix it?

>Solution :

string ln = "2-4,6-8";
var splittedString = ln.Split(',').Select(x => x.Split('-').Select(int.Parse).ToArray());
int[] first = splittedString.ElementAt(0);
int[] second = splittedString.ElementAt(1);
var firstPairRange = Enumerable.Range(first[0], first[1] - first[0] + 1);
var secondPairRange = Enumerable.Range(second[0], second[1] - second[0] + 1);