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Question
In linux, regular expression subexpressions, marked via the enclosing [...] syntax, group parts of a regular expression together, so they can be swapped or just displayed in chuncks via sed, for example.
Answer
\(\)

Question
In linux, regular expression subexpressions, marked via the enclosing [...] syntax, group parts of a regular expression together, so they can be swapped or just displayed in chuncks via sed, for example.
Answer
?

Question
In linux, regular expression subexpressions, marked via the enclosing [...] syntax, group parts of a regular expression together, so they can be swapped or just displayed in chuncks via sed, for example.
Answer
\(\)
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8. Streams and sed -- The Stream Editor
moving text around within lines. Consider, for example, the output of ls : say you want to automatically strip out only the size column-- sed can do this sort of editing if you use the special <span>\( \) notation to group parts of the regular expression together. Consider the following example: sed -e 's/\(<[^ ]*>\)\([ ]*\)\(<[^ ]*>\)/\3\2\1/g' Here sed is searching for the

Summary

statusnot learnedmeasured difficulty37% [default]last interval [days]               
repetition number in this series0memorised on               scheduled repetition               
scheduled repetition interval               last repetition or drill

Details

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