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How do I perform a Perl substitution on a string while keeping the original?

In Perl, what is a good way to perform a replacement on a string using a regular expression and store the value in a different variable, without changing the original? ...
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How can I change an element's class with JavaScript?

...xplanation of this regex is as follows: (?:^|\s) # Match the start of the string, or any single whitespace character MyClass # The literal text for the classname to remove (?!\S) # Negative lookahead to verify the above is the whole classname # Ensures there is no non-space character ...
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How to print the values of slices

..., that is []*Project (instead of []Project), you are better off defining a String() method in order to display exactly what you want to see (or you will see only pointer address). See this play.golang example. share ...
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How do I convert a NSString into a std::string?

I have an NSString object and want to convert it into a std::string . 3 Answers 3 ...
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C#: Looping through lines of multiline string

What is a good way to loop through each line of a multiline string without using much more memory (for example without splitting it into an array)? ...
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Ruby combining an array into one string

In Ruby is there a way to combine all array elements into one string? 3 Answers 3 ...
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How to render an ASP.NET MVC view as a string?

I want to output two different views (one as a string that will be sent as an email), and the other the page displayed to a user. ...
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What is %2C in a URL?

...mma (,). You should use your language's URL encoding methods when placing strings in URLs. You can see a handy list of characters with man ascii. It has this compact diagram available for mapping hexadecimal codes to the character: 2 3 4 5 6 7 ------------- 0: 0 @ P ` p 1:...
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String replacement in Objective-C

How to replace a character is a string in Objective-C? 6 Answers 6 ...
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What is Normalisation (or Normalization)?

...1 | Toyota 2 | Ford,Cadillac Here the "Car" column (which is a string) have several values. That offends the first normal form, which says that each cell should have only one value. We can normalize this problem away by have a separate row per car: UserId | Car --------------------- 1 ...