Hola, Mike Wright wrote: > I have a regex I'm trying to build. A match is determined by the contents > of the first two columns. > > if column 1 is a "}" the line is a match > if column 1 is a " " and column 2 is not a " " the line is a match > > Now this seems simple but all I've managed to do is create an error message > generator ;/ > > Any and all help is appreciated.
Assuming I've understood, I think either of the two methods
below should work. There's certainly other ways to do it,
too. I tend to use extended regular expressions more (the
`grep -E` example).
$ cat <<'EOF' >patterns
not a match
} is a match
not a match
is a match
EOF
$ grep -e '^}' -e '^ [^ ]' patterns
} is a match
is a match
$ grep -E '^(}| [^ ])' patterns
} is a match
is a match
HTH,
--
Todd
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