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Full Discussion: Learning regular expressions
Top Forums UNIX for Dummies Questions & Answers Learning regular expressions Post 302894202 by Ditto on Monday 24th of March 2014 10:44:50 AM
Old 03-24-2014
Learning regular expressions

Hey, trying to learn more tricks with regular expressions, and got this one.

Best I could come up with for this problem is a "two-stepper" :

Code:
egrep -i "[a-zA-Z0-9]@[a-zA-Z0-9]" test.txt | egrep -v "@[a-zA-Z0-9]*.com"

Which does bring back the proper results. I'm interested, however, if this can be done with a single reg exp ?

Test file is:

Code:
quick brown fox@gmail.com jumped over
quick brown fox@il.com jumped over
lazy dog@over the hill
lazy dog@mail the hill
jack and @jill
ignore this line

Expected return is:

Code:
lazy dog@over the hill
lazy dog@mail the hill

Basically:
@xxx.com is an email, ignore it.
<space>@xxx isn't a pattern I want, ignore it.
no @ in line - don't want it, ignore it.

<string>@<string> is what I'm looking for - but not ending in .com.
(I just look for single character before and after, that way I know it has to be upper/lower case, or number only. No need to look for _, or other special characters.

In short: I'm searching for Oracle DB Links, but don't want email addresses, or SQL script calls.
 

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linsert(1T)						       Tcl Built-In Commands						       linsert(1T)

__________________________________________________________________________________________________________________________________________________

NAME
linsert - Insert elements into a list SYNOPSIS
linsert list index element ?element element ...? _________________________________________________________________ DESCRIPTION
This command produces a new list from list by inserting all of the element arguments just before the index'th element of list. Each ele- ment argument will become a separate element of the new list. If index is less than or equal to zero, then the new elements are inserted at the beginning of the list. If index has the value end, or if it is greater than or equal to the number of elements in the list, then the new elements are appended to the list. end-integer refers to the last element in the list minus the specified integer offset. EXAMPLE
Putting some values into a list, first indexing from the start and then indexing from the end, and then chaining them together: set oldList {the fox jumps over the dog} set midList [linsert $oldList 1 quick] set newList [linsert $midList end-1 lazy] # The old lists still exist though... set newerList [linsert [linsert $oldList end-1 quick] 1 lazy] SEE ALSO
list(1T), lappend(1T), lindex(1T), llength(1T), lsearch(1T), lset(1T), lsort(1T), lrange(1T), lreplace(1T) | KEYWORDS
element, insert, list ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +--------------------+-----------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +--------------------+-----------------+ |Availability | SUNWTcl | +--------------------+-----------------+ |Interface Stability | Uncommitted | +--------------------+-----------------+ NOTES
Source for Tcl is available on http://opensolaris.org. Tcl 8.2 linsert(1T)
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