08-08-2008
I'd really like to have a firm grasp on regular expressions one these days, so that information is much appreciated. Thanks, again!
10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
I would like to do this:
replace the word "prod" with the word "special" but it may occur through the file naturally without a command, I only want it to happen when it has a specific command in front of it. The command will always look like this
<IMG,###,###,##,>prod/directory/IMG/file
... (4 Replies)
Discussion started by: Shakey21
4 Replies
2. Shell Programming and Scripting
From my understanding when using regex1|regex2 the matching process tries each alternative in turn, from left to right, and the first one that succeeds is used.
When im trying to extract the name from those examples:
A) name.can.be.different.20.03.2009.boom
B)... (2 Replies)
Discussion started by: TehOne
2 Replies
3. Shell Programming and Scripting
I am having trouble parsing rpm filenames in a shell script.. I found a snippet of perl code that will perform the task but I really don't have time to rewrite the entire script in perl. I cannot for the life of me convert this code into something sed-friendly:
if ($rpm =~ /(*)-(*)-(*)\.(.*)/)... (1 Reply)
Discussion started by: suntzu
1 Replies
4. Shell Programming and Scripting
Hello,
I'd like to write a regex that transforms a German base form of a noun into one of its inflected forms, namely
I want to translate "Haus" to "Häuser"
This is what I've got:
/^(.+)$/_Umlaut( $1 )_er/
where _Umlaut( x )_ is a function operating on the noun stem captured by $1 The... (1 Reply)
Discussion started by: Bloomy
1 Replies
5. Shell Programming and Scripting
Hi,
I want to validate strings in perl, the string may contains characters from a-zA-Z0-9 and symbols +-_.:/\
To validate such a string I computed a regex
if ($string =~ m/^/) {
print "valid";
} else {
print "invalid";
}
but this regex also validates strings that contain... (8 Replies)
Discussion started by: zing_foru
8 Replies
6. Shell Programming and Scripting
Hi,
Could you please help me in writing a regex for the following requirement?
Let following be the string format:
abc.cdef.ghij.lm
I need to check between dots, there is atleast one character{a-z,A-Z,*}.
Eg: abc1.gt2.345j is valid, but not 123.abc.vff.gth because 123 should not be... (2 Replies)
Discussion started by: lorzinian
2 Replies
7. UNIX for Dummies Questions & Answers
I am looking for the proper regex to match the hostname "areagc11" of this log.... Any help would be awsome:)
Oct 25 11:08:18 areagc11 961: Oct 25 18:08:17.536 GMT: %SYS-5-CONFIG_I: Configured from console by someone onvty1 (10.156.72.97) (6 Replies)
Discussion started by: jlaigo2
6 Replies
8. UNIX for Dummies Questions & Answers
Hi,
Have to filter out string before the last underscore in the following
input: UNIX_Solaris_59_KSH
output: UNIX_Solaris_59
dummy one but :mad:
Thanks & Regards,
Sourabh Singh Khichi (4 Replies)
Discussion started by: skhichi
4 Replies
9. Shell Programming and Scripting
Hi all, please can anyone show me how to use sed and regular expressions to achieve the following.
If a line contains a capital A followed by exactly 5 or 6 characters followed by an angled bracket then insert an asterix before the angled bracket.
So:
XCONFIGA12345<X
Becomes:
... (5 Replies)
Discussion started by: Jedimark
5 Replies
10. Shell Programming and Scripting
hi
i would like to say "DATABASENAME=" to "TABLESNAME="
remove "," and press enter myconfig file
thanks (1 Reply)
Discussion started by: mnnn
1 Replies
REGEXP(6) Games Manual REGEXP(6)
NAME
regexp - regular expression notation
DESCRIPTION
A regular expression specifies a set of strings of characters. A member of this set of strings is said to be matched by the regular
expression. In many applications a delimiter character, commonly bounds a regular expression. In the following specification for regular
expressions the word `character' means any character (rune) but newline.
The syntax for a regular expression e0 is
e3: literal | charclass | '.' | '^' | '$' | '(' e0 ')'
e2: e3
| e2 REP
REP: '*' | '+' | '?'
e1: e2
| e1 e2
e0: e1
| e0 '|' e1
A literal is any non-metacharacter, or a metacharacter (one of .*+?[]()|^$), or the delimiter preceded by
A charclass is a nonempty string s bracketed [s] (or [^s]); it matches any character in (or not in) s. A negated character class never
matches newline. A substring a-b, with a and b in ascending order, stands for the inclusive range of characters between a and b. In s,
the metacharacters an initial and the regular expression delimiter must be preceded by a other metacharacters have no special meaning and
may appear unescaped.
A matches any character.
A matches the beginning of a line; matches the end of the line.
The REP operators match zero or more (*), one or more (+), zero or one (?), instances respectively of the preceding regular expression e2.
A concatenated regular expression, e1e2, matches a match to e1 followed by a match to e2.
An alternative regular expression, e0|e1, matches either a match to e0 or a match to e1.
A match to any part of a regular expression extends as far as possible without preventing a match to the remainder of the regular expres-
sion.
SEE ALSO
awk(1), ed(1), sam(1), sed(1), regexp(2)
REGEXP(6)