CODEWITHSUNDEEP
c#
user2773218
user2773218

Reputation: 87

Remove a single space from a string

"How do I do this?              "

Let's say I have this string. How do I remove only one space from the end? The code shown below gives me an error saying the count is out of range. 

string s = "How do I do this?              ";
s = s.Remove(s.Length, 1);

Upvotes: 1

Views: 228

Answers (6)

devavx
devavx

Reputation: 1045

Another way to do it is;

string s = "How do I do this?              ";
s=s.SubString(0,s.Length-1);

Additional :

If you would like do some additional checking for the last character being a space or anything,you can do it in this way;

    string s = "How do I do this?              a";//Just for example,i've added a 'a' at the end.
    int index = s.Length - 1;//Get last Char index.
    if (index > 0)//If index exists.
    {
        if (s[index] == ' ')//If the character at 'index' is a space.
        {
            MessageBox.Show("Its a space.");
        }
        else if (char.IsLetter(s[index]))//If the character at 'index' is a letter.
        {
            MessageBox.Show("Its a letter.");
        }
        else if(char.IsDigit(s[index]))//If the character at 'index' is a digit.
        {
            MessageBox.Show("Its a digit.");
        }
    }

This gives you a MessageBox with message "Its a letter".

One more thing that might be helpful,if you want to create a string with equal no. of spaces between each word,then you can try this.

    string s = "How do I do this?              ";
    string[] words = s.Split(new char[] {' '},StringSplitOptions.RemoveEmptyEntries);//Break the string into individual words.
    StringBuilder sb = new StringBuilder();
    foreach (string word in words)//Iterate through each word.
    {
        sb.Append(word);//Append the word.
        sb.Append(" ");//Append a single space.
    }
    MessageBox.Show(sb.ToString());//Resultant string 'sb.ToString()'.

This gives you "How do I do this? " (equal spaces between words).

Upvotes: 0

Robert Byrne
Robert Byrne

Reputation: 560

This is a little safer, just in case the last character is not a space

string s = "How do I do this?              ";
s = Regex.Replace(s, @" $", "")

Upvotes: 1

Force444
Force444

Reputation: 3381

You have to write something in the lines of

string s = "How do I do this?
s = s.Remove(s.Length-1, 1);

Reason being that in C# when referring to indexes in arrays the first element is always at position 0 and end at Length - 1. The Length generally tells you how long a string is but doesn't map to the actual array index.

Upvotes: 0

suff trek
suff trek

Reputation: 39767

Just do a substring from the first character (chars are 0-based in string) and get number of chars less the string length by 1

s = s.Substring(0, s.Length - 1);

Upvotes: 1

Hamlet Hakobyan
Hamlet Hakobyan

Reputation: 33381

The indexing in C# are zero-based.

s = s.Remove(s.Length - 1, 1);

Upvotes: 2

Save
Save

Reputation: 11938

You just have to use this instead :

string s = "How do I do this?              ";
s = s.Remove(s.Length-1, 1);

As stated here:

Remove(Int32) Returns a new string in which all the characters in the current instance, beginning at a specified position and continuing through the last position, have been deleted.

In an array, positions range from 0 to Length-1, hence the compiler error.

Upvotes: 3

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