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How can I check if a file exists in Perl?
...mething exists at given path using the -e file-test operator.
print "$base_path exists!\n" if -e $base_path;
However, this test is probably broader than you intend. The code above will generate output if a plain file exists at that path, but it will also fire for a directory, a named pipe, a syml...
Using :before CSS pseudo element to add image to modal
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http://caniuse.com/#search=:after
:after and :before with content are okay to use as they're supported in every major browser other than Internet Explorer at least 5 versions back. Internet Explorer has complete support in v...
Message Queue vs. Web Services? [closed]
...tead of via web services (I just mean XML or JSON or YAML or whatever over HTTP here, not any particular type)?
5 Answers
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How to sort Map values by key in Java?
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@cricket_007 the code is demonstrating specifically how to iterate across they keys for a map that isn't already sorted.
– Jherico
Mar 2 '16 at 17:47
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vs in Generics
...more information, see Covariance and Contravariance (C# and Visual Basic). http://msdn.microsoft.com/en-us/library/ee207183.aspx
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Finding which process was killed by Linux OOM killer
...ses a process to kill based on some heuristics (it's an interesting read: http://lwn.net/Articles/317814/ ).
4 Answers
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How do I read the source code of shell commands?
...rt of the coreutils package.
You can find all information you need here:
http://www.gnu.org/software/coreutils/
If you want to download the latest source, you should use git:
git clone git://git.sv.gnu.org/coreutils
To install git on your Ubuntu machine, you should use apt-get (git is not inclu...
RegEx to parse or validate Base64 data
...l show up in valid Base64, so I think you can unambiguously throw away the http://www.stackoverflow.com line. In Perl, say, something like
my $sanitized_str = join q{}, grep {!/[^A-Za-z0-9+\/=]/} split /\n/, $str;
say decode_base64($sanitized_str);
might be what you want. It produces
This is si...
How do I change the default author and committer in the Eclipse Git plugin?
...ime you commit something. But you can always change it later on, see here: http://wiki.eclipse.org/EGit/User_Guide#Identifying_yourself
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How do I set cell value to Date and apply default Excel date format?
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http://poi.apache.org/spreadsheet/quick-guide.html#CreateDateCells
CellStyle cellStyle = wb.createCellStyle();
CreationHelper createHelper = wb.getCreationHelper();
cellStyle.setDataFormat(
createHelper.createDataFormat(...