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String vs. StringBuilder

I understand the difference between String and StringBuilder ( StringBuilder being mutable) but is there a large performance difference between the two? ...
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What exactly do “u” and “r” string flags do, and what are raw string literals?

While asking this question , I realized I didn't know much about raw strings. For somebody claiming to be a Django trainer, this sucks. ...
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Format a Go string without printing?

Is there a simple way to format a string in Go without printing the string? 7 Answers ...
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How is null + true a string?

Since true is not a string type, how is null + true a string ? 7 Answers 7 ...
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How can I select from list of values in SQL Server

...ou can also do something like this: SELECT DISTINCT * FROM (select unnest(string_to_array('a;b;c;d;e;f;a;b;d', ';'))) AS tbl(col1) share | improve this answer | follow ...
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How to replace all occurrences of a character in string?

... to replace all occurrences of a character with another character in std::string ? 15 Answers ...
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How can I do a case insensitive string comparison?

... not the best practice in .NET framework (4 & +) to check equality String.Compare(x.Username, (string)drUser["Username"], StringComparison.OrdinalIgnoreCase) == 0 Use the following instead String.Equals(x.Username, (string)drUser["Username"], StringC...
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Best way to reverse a string

I've just had to write a string reverse function in C# 2.0 (i.e. LINQ not available) and came up with this: 48 Answers ...
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Why can't strings be mutable in Java and .NET?

Why is it that they decided to make String immutable in Java and .NET (and some other languages)? Why didn't they make it mutable? ...
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Why is it Valid to Concatenate Null Strings but not to Call “null.ToString()”?

... The reason for first one working: From MSDN: In string concatenation operations,the C# compiler treats a null string the same as an empty string, but it does not convert the value of the original null string. More information on the + binary operator: The binary + operat...