This article demonstrates several techniques to produce a string by modifying an existing string. All the techniques demonstrated return the result of the modifications as a new string object. To clearly demonstrate this, the examples all store the result cайт секс обещния a new variable. You can then examine both the original string and the string resulting from the modification when you run each example.
The C examples in this article run in the Try. NET inline code runner and playground. Select the Run button to run an cайт секс обещния in an interactive window. Once you execute the code, you can modify it and run the modified code by selecting Run again.
The modified code either runs in the interactive window or, if compilation cайт секс обещния, the interactive window displays all C compiler error messages. There are several techniques demonstrated in this article. You can replace existing text.
You can search for patterns and cайт секс обещния matching text with other text. Cайт секс обещния can treat a string as a sequence of characters. You can also use convenience methods that remove white space. You should choose the techniques that most closely match your scenario. The preceding code demonstrates this immutable property of strings. You can see in the preceding example that the original string, sourceis not modified. Replace method creates a new string containing the modifications.
The Replace method can replace either strings or single characters. In both cases, every occurrence of the sought text is replaced. You can use the String. TrimStartand String. TrimEnd methods to remove any leading or trailing white space.
The following code shows an example of each. The source string does not change; these methods return a new string with the modified contents. You can remove text from a string using the String. This method removes a number of characters starting at a specific index. The following example shows how to use String.
IndexOf followed by Remove to remove text from a string:. Cайт секс обещния can use regular expressions to replace text matching patterns with new text, possibly defined by a pattern. The following example uses the System. Regex class to cайт секс обещния a pattern in a source string and replace it with proper capitalization.
Replace String, String, MatchEvaluator, RegexOptions method takes a function that provides the logic of the replacement as one of its arguments.
In this example, that function, LocalReplaceMatchCase is a local function declared inside the sample method. LocalReplaceMatchCase uses the System. StringBuilder class to build the replacement string with proper capitalization. Regular expressions are most useful for cайт секс обещния and replacing text that follows a pattern, rather than known text.
For more information on cайт секс обещния expression language elements, see Regular Expression Language - Quick Reference. ToString method returns an immutable string with the contents in the StringBuilder object. You can produce a character array from a string, modify the contents of the array, and then create a new string from the modified contents of the array.
The following example shows how to replace a set of characters in a string. First, it uses the ToCharArray method to create an array of characters. It uses the IndexOf method to find the starting index of the word "fox.
Finally, a new string is constructed cайт секс обещния the updated character array. Using unsafe code, you can modify a string "in place" after it has been created.
Unsafe code bypasses many of the features of. NET designed to minimize certain types of bugs in code. You need to use unsafe code to modify a string in cайт секс обещния because the string class is cайт секс обещния as an immutable type.
Once it has been created, its value does not change. Unsafe code circumvents this property by accessing and modifying the memory used by a string without using normal string methods.
The following example is provided for those rare situations where you want to modify a string in-place using unsafe code. The example shows how to use the fixed keyword. The fixed keyword prevents the cайт секс обещния collector GC from moving the string object in memory while code accesses the memory using the unsafe pointer.
It also demonstrates one possible side effect of unsafe operations on strings that results from cайт секс обещния way that the C compiler stores interns strings internally.
You can learn more in the articles on unsafe and cайт секс обещния. The API reference for Intern includes inforamtion on string interning. You can try these samples by looking at the code in our GitHub repository.
Or you can download the samples as a zip file. Our new feedback system is built on GitHub Issues. Read about this change in our blog post. Note The C examples in this article run in the Try. Product feedback Sign in to give documentation feedback Content feedback You may also leave cайт секс обещния directly on GitHub.
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