I am trying to split a string that the user tiped in. For example: He types in "Hello". So I want to split this up into an array: ["H","E","L",...]. So how do I use this .split() function?
And how do I save it into an Array?
Thank you guys.
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7Try this link it should be helpful stackoverflow.com/questions/1485237/…C Kingsley– C Kingsley2016-01-21 10:39:08 +00:00Commented Jan 21, 2016 at 10:39
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3 Answers
If you want a char[] like {'H', 'e', 'l', 'l', 'o'} you can simply use ToCharArray():
string s = "Hello";
char[] letters = s.ToCharArray();
If you want a string[] like {"H", "e", "l", "l", "o"} you can do it like this:
string s = "Hello";
string[] letters = s.Select(c => c.ToString()).ToArray();
3 Comments
Camilo Terevinto
Could you please add that if
string myString = "hello" then char e = myString[1] is completely valid?
Ivan Stoev
In the second case,
.ToCharArray() call is redundant.
René Vogt
@IvanStoev right, thx. Updated.
If you want a string[] as your desired result ["H","E","L",... suggests:
string input = "Hello";
char[] chars = input.ToCharArray();
string[] asStringArray = Array.ConvertAll(chars, char.ToString);
String.ToCharArray is better than Enumerable.ToArray if the string is large because ToCharArray knows the size of the string beforehand. So it can initialize the array with the correct size without needing to resize it again and again.
The same applies to Array.ConvertAll which knows the size of the array.
2 Comments
Corak
According to referencesource,
Enumerable.ToArray fills a Buffer that checks if the given sequence implements ICollection<T> and if so uses its Count, so there wouldn't be much (if any) advantage in using String.ToCharArray over Enumerable.ToArray. ---- strike that, string doesn't implement ICollection<T>, so you're absolutely right.
Filburt
Good to know since my approach would have been
string[] asStringArray = input.Select(c => c.ToString()).ToArray();char[] myArray = myString.ToArray();
5 Comments
choz
Is it possible to just do
myString[0] in c#? Haven't touched it for long time.
PulseLab
Yes, myString[0] would return the first char of that string. You could iterate over the string length I guess!
choz
I wasn't talking about an array. Just random question whether it'd throw an error or not. Tq FYI. :)
Tim Schmelter
String.ToCharArray is better than Enumerable.ToArray because it can initialize the array with the correct size beforehand.René Vogt
Seems OP asks for a
string[] and not a char[]