C#: How to detect . in string and insert a space after it/How to insert space after n chars

cstring

Suppose I have a long string like 4600airportburlingame150anzablvd.burlingamecalifornia94010. My code is breaking on this string. This is unusual, 99% of entries will not have a period. The CSS in the browser wraps if there are spaces in the string and there isn't any here.

How do I detect the period (".") and insert a space directly after it? Remember 99% of strings will not have a period in them. The code has to detect if it has a period and if so, do the insertion, otherwise not.
If I determine a maximum string length, how do I insert a space at some length?

Best Answer

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To insert a space after every dot:

var newString = oldString.Replace(".", ". ");

To insert a space after every dot except for the dots that already have a space or dots at the end of the string:

var newString = Regex.Replace(oldString, @"\.(?! |$)", ". ");

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To insert a space after every n characters:

var newString = Regex.Replace(oldString, new string('.', n), m => m.Value + " ");

Related Solutions

C# – the difference between String and string in C#

string is an alias in C# for System.String.
So technically, there is no difference. It's like int vs. System.Int32.

As far as guidelines, it's generally recommended to use string any time you're referring to an object.

e.g.

string place = "world";

Likewise, I think it's generally recommended to use String if you need to refer specifically to the class.

e.g.

string greet = String.Format("Hello {0}!", place);

This is the style that Microsoft tends to use in their examples.

It appears that the guidance in this area may have changed, as StyleCop now enforces the use of the C# specific aliases.

Bash – How to check if a string contains a substring in Bash

You can use Marcus's answer (* wildcards) outside a case statement, too, if you use double brackets:

string='My long string'
if [[ $string == *"My long"* ]]; then
  echo "It's there!"
fi

Note that spaces in the needle string need to be placed between double quotes, and the * wildcards should be outside. Also note that a simple comparison operator is used (i.e. ==), not the regex operator =~.

Best Answer

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Related Solutions

C# – the difference between String and string in C#

This is the style that Microsoft tends to use in their examples.

Bash – How to check if a string contains a substring in Bash

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