Perl – What’s the simplest way to return the first line of a multi-line string in Perl

multilineperlstring

When I say simple, I mean, within an expression, so that I can stick it in as a value in a hash without preparing it first. I'll post my solution but I'm looking for a better one that reminds me less of VB. 🙂

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How about

( split /\n/, $s )[0]

You don't have to worry about \n being not cross-platform because Perl is clever enough to take care of that.

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Java – How to check if a String contains another String in a case insensitive manner in Java

Yes, contains is case sensitive. You can use java.util.regex.Pattern with the CASE_INSENSITIVE flag for case insensitive matching:

Pattern.compile(Pattern.quote(wantedStr), Pattern.CASE_INSENSITIVE).matcher(source).find();

EDIT: If s2 contains regex special characters (of which there are many) it's important to quote it first. I've corrected my answer since it is the first one people will see, but vote up Matt Quail's since he pointed this out.

C# – What’s the @ in front of a string in C#

It marks the string as a verbatim string literal - anything in the string that would normally be interpreted as an escape sequence is ignored.

So "C:\\Users\\Rich" is the same as @"C:\Users\Rich"

There is one exception: an escape sequence is needed for the double quote. To escape a double quote, you need to put two double quotes in a row. For instance, @"""" evaluates to ".

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Java – How to check if a String contains another String in a case insensitive manner in Java

C# – What’s the @ in front of a string in C#

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