Regx & Litgrep
Simple script to convert things like:
begin digit repeat 5 space one_or_more digit repeats 2 5
Into:
^[[:digit:]]{5}[[:space:]]+[[:digit:]]{2,5}
Use it as a command expansion:
egrep $( regx any_of A-Z X zero_or_more )
In addition, you can use litgrep:
litgrep any_of A-Z digit -- file1.txt file2.txt
Mappings
- any_char - .
- zero_or_more - *
- one_or_more - +
- start - ^
- end - $
- digit - [[:digit:]]
- not_digit - [^[:digit:]]
- alpha - [[:alpha:]]
- not_alpha - [^[:alpha:]]
- blank - [[:blank:]]
- not_blank - [^[:blank:]]
- space - [[:space:]]
- not_space - [^[:space:]]
- or - |
- optional - ?
- open_group - (
- close_group - )
- any_of X - [X]
- none_of X - [^X]
- group X - (X)
- hex ff - \xff
- repeat 5 - {5}
- repeats 1 5 - {1,5}
- at_least 3 - {3,}
- literal ABC - ABC
- range A Z A-Z
- cr, lf, tab, bell, esc, ff, vt - special characters