Extract file extension: Difference between revisions
→{{header|sed}}: Add sed solution
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file ext= [null] for file name=/path/to.my/file
file ext= [null] for file name=file.odd_one
</pre>
=={{header|sed}}==
<lang sed>s:.*\.:.:
s:\(^[^.]\|.*[/_]\).*::
</lang> or <lang bash>sed -re 's:.*\.:.:' -e 's:(^[^.]|.*[/_]).*::'</lang>
{{out}}<pre>.jpg
.png
.longextension
IAmAFileWithoutExtension
</pre>
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