I have this word and I would like to split it into arrays with taking the last previous character in every iteration of split .
string word = "HelloWorld!";
string[] mystringarray = word.Select(x => new string(x, 2)).ToArray();
Console.WriteLine(mystringarray);
Output result :
[HH,ee,ll,oo,WW,oo,rr,ll,dd,!!]
Expected result :
[He,el,ll,lo,ow,wo,or,rl,ld]
How can I achieve that?
string word = "HelloWorld!";
List<string> mystringarray = new();
for (int i = 1; i < word.Length; i++)
{
mystringarray.Add(word.Substring(i-1, 2));
}
Contents of mystringarray:
List<string>(10) { "He", "el", "ll", "lo", "oW", "Wo", "or", "rl", "ld", "d!" }
Note the exclamation mark which I'm not sure you wanted to include.
I think the following code implements the output you want. Its algorithm is :
(0, 1),
(1, 2),
(2, 3),
......
string[] mystringarray = word.
Select((x,i) =>
i == 0 || i + 1 == word.Length ? x.ToString() : x + word.Substring(i,1))
.ToArray();
Or use Enumerable.Range
string[] mystringarray2 = Enumerable.Range(0, word.Length).
Select(i => i == 0 || i + 1 == word.Length ? word[i].ToString() : word[i] + word.Substring(i,1))
.ToArray();