Text processing cut, sort, uniq, paste regular expressions 1 cut Extract text by column cut -d DELIMITER -f FILEDS .example,cut -d: -f1, use- d: Colon separator, use f1 to get the first column.
Tag: regular
Regular expression – Perl if statement confusion
This code is an if statement; I want to test whether $rtgene contains trn.
I tested the code with $rtgene = nad3:
if ($rtgene!~/trn/){
$end=$data[$i][0]+100;
}
else{< br />$end =$data[$i][1]
Use a sub-string twice in regular expressions
First of all, this question may have been asked before, but I am not sure what phrase to search for.
I have a string:
Maaaa
I have a pattern:
aaa< /p> I want to match twice
Use regular expressions to delete duplicate rows
I have a list of html links, most of which are repeated, as in the following example->
> http://example.com/some/a-test-link.html
> http://example.com/some/a-test-link.html
> http://example.
Regular expression – [0-9A-FA-F] is the same as [0-9A-F-A-F]?
Are these two equivalent? [0-9a-fA-F] and [0-9a-fAF]
In some texts, I have been trying to use egrep these two regular expressions, they seem to be equivalent .
Is there a case where they will
Regular expression – GREP: How to search for, but simultaneously exclude some match
I need a way to simplify this command:
grep’SEARCHTERM’ server.log | grep -v ‘ PHHIABFFH’ | grep -v’Stats’ It should find all rows including SEARCHTERM, but exclude if one of the SEARCHTERM r
Why doesn’t my regular expression matching version number does not work?
I am using perl regular expressions to match a problem with a web script I have, and I have managed to put the behavior in a small snippet.
Use this Perl snippet in Perl 5.10.0 in Debian:
Regular expression matching, very simple:
I want to match Twitter grammar with regular expressions.
How do I match any “@______”, that is, start with the @ symbol and nothing after it Spaces, only letters and numbers, until the end o
Use variables with regular expressions to find data in MongoDB (Meteor APP)
I need to get data from Mongodb, depending on what I’m searching for. It works fine in the next two examples:
//Example 1;
var variable = “car”; Items.find({“description”: variable}).fetch()
6. GREP and regular expressions
One, Regular Expression Regular Expression: Regual Expression, REGEXP.
A pattern written by a type of special characters and text characters, some of which do not express their literal meaning, bu