You did not say what you did in detail.
If you do a substitution, then you need to capture everything in the RE that you want to substitute! A trailing .* might do it.
You mention perl. In perl you can (group) a part of the RE, and refer the matched part as $1 in a substitution string and afterwards.
The and means "continue if true". In a logical and the RHS is only evaluated (i.e. run) if the LHS is true.
BTW a substitution in perl is less elegant:
This is quite similar to (GNU-)sed:
Last edited by MadeInGermany; 07-02-2019 at 05:46 AM..
This User Gave Thanks to MadeInGermany For This Post:
Hi,
i want to match a string using perl that has got 5 pluses(+++++).
i am using a function for this.
$str1="+++++";
check($str1,"\\+");
sub check{
$str1=$_;
$str2=$_;
if($str1=~m/^$str2{5}$/){
print "Correct.\n";
}else{
print "Wrong..\n";
... (6 Replies)
Hi,
I am trying to grep for the following type of string from a document given below:
12637 1239 3356 12956 7004 7004 7004 13381 13381
*> 12.0.1.63 0 7018 21872 ?
* 208.51.134.254 53 0 3549 7018 21872 ?... (1 Reply)
Can anyone give the detailed explanation on regex search
i want to know the use of regex in sed and awk also......
the operators like ^,.,* ....etc i need it with some example.....kindly help on this.
I gone through the man pages also..but i was not clear......... (1 Reply)
I would like to search strings composed by only one type of charachter for example
only strings composed by the charachter 'b'
is it right?
$egrep '\<(b+)+\>' filename
Could be there some side effects?
Regards. (1 Reply)
I am having trouble parsing rpm filenames in a shell script.. I found a snippet of perl code that will perform the task but I really don't have time to rewrite the entire script in perl. I cannot for the life of me convert this code into something sed-friendly:
if ($rpm =~ /(*)-(*)-(*)\.(.*)/)... (1 Reply)
I have a regex I'd like to implement and I believe it should be working and I have tested it on various websites that have regex testers but it always says the name is invalid.
#!/bin/bash -x
echo Enter the users first and last name.
read name
if... (11 Replies)
I have a file of protein sequences with headers (my source file). Based on a list of IDs (which are included in some of the headers), I'd like to print out only the specified sequences, with only the ID as header.
In other words, I'd like to search source.txt for the terms in IDs.txt, and print... (3 Replies)
I am not a big expert in regex and have just little understanding of that language.
Could you help me to understand the regular Perl expression:
^(?!if\b|else\b|while\b|)(?:+?\s+){1,6}(+\s*)\(*\) *?(?:^*;?+){0,10}\{
------
This is regex to select functions from a C/C++ source and defined in... (2 Replies)
Here i am writing a script to check&display only the valid mail address from a file
echo "Plz enter the Target file name with path"
read path
if
then
echo "The valid mail address are:"
email=$(grep -E -o "\b+@+\.{2,6}\b" $path )
echo "$email"
fi
The file contains the data like this:... (6 Replies)
I'm trying to get some exclusions into our sendmail regular expression for the K command. The following configuration & regex works:
LOCAL_CONFIG
#
Kcheckaddress regex -a@MATCH
+<@+?\.++?\.(us|info|to|br|bid|cn|ru)
LOCAL_RULESETS
SLocal_check_mail
# check address against various regex... (0 Replies)