There is an array of characters e.g.
char [] biggerText = new char [8];
then I input some values likewise:
biggerText[0] = (char) 12;
biggerText[1] = (char) 48;
then I use the following operation:
string smallerText= string.Join("", biggerText);
and when you perform smallerText.Length you get 8 and NOT 2.
What is the most effective method to trim this array to omit the null values when converting to string?
Why don't you use a List<char>? This way, you don't have to worry about indexes, and you don't have to know the final length at the beginning (as pointed out in the comment by @n8wrl).
var list = new List<char>();
list.Add((char)12);
list.Add((char)48);
Then you can get the final string in a more elegant way:
var smallerText = new string(list.ToArray());
And this string will have the correct Length.
You can make a new string from the array and trim the null chars from the end:
string smallerText = new String(biggerText).TrimEnd('\0');
This should do the trick.
string smallerText = string.Join("", biggerText.Where(n => n != '\0'));
This is a good way to do it, because Trim will work just with white spaces and may not work well for you.
Trim will work just with white spaces" - not so. You should review the documentation for Trim.
You can use TakeWhile to only take the characters until you see a "null" character assuming you don't want any of the characters that might exist after the first "null" character.
string smallerText= string.Join("", biggerText.TakeWhile(c => c != '\0'));
char [] biggerText = new char [8];
biggerText[0] = (char)12;
biggerText[1] = (char)48;
string smallerText= new string(biggerText).Replace("\0", string.Empty);
int length = smallerText.Length;
\0 can be at any location, so just replace it with empty value.
If you mean the most efficient:
string smallerText = new string(biggerText, 0, 2);
but "the most effective method to trim" is the .Trim method 😊
string smallerText = new string(biggerText).TrimEnd(char.MinValue);
Here's my solution with spans!
ReadOnlySpan<char> chars = biggerText;
string smallerText = chars.TrimEnd(char.MinValue).ToString();
In my opinion, this is much better than other answers. It wraps char array as ReadOnlySpan<char> and trim it's end by calculating actual length.
Note that it's working better with arrays, not strings. For strings, use string.TrimEnd(char);
