metacharacters are non-alphanumeric characters which are part of the processing model of a program rather than the literal value of a string
References
Questions tagged [metacharacters]
84 questions
0
votes
2 answers
How can I get a long listing of text files containing "foo" followed by two digits?
Using metacharacters, I need to perform a long listing of all files whose name contains the string foo followed by two digits, then followed by .txt. foo**.txt will not work, obviously. I can't figure out how to do it.
user2504710
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0
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1 answer
regular expressions metacharacters screening
To find substring I use regEx pattern = "^value\s\w+\s\d+$", where value sometimes contains metacharacters. I just need to know if it is possible to make metacharacters from value not to be interpret as metacharacters?
Bor1ss
- 39
- 7
0
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0 answers
JQuery selector with meta-character using literals
I know there are a lot of threads about using meta-character in jQuery selector, but I promise this is unique. I've an html div element with meta-character in its id. Like below,
Click ME
Kay
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0
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2 answers
Sub-pattern in regex can't be dereferenced?
I have following Perl script to extract numbers from a log. It seems that the non-capturing group with ?: isn't working when I define the sub-pattern in a variable. It's only working when I leave out the grouping in either the regex-pattern or the…
EverythingRightPlace
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0
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3 answers
confusion in Meta characters of perl
When I run the below program, it gave me nothing ("") as result.
Scenario 1:-
$var = "A STITCH IN TIME SAVES NINE";
if ($var =~ /[1..9]/i) {
print "FOUND\n"
}
But when I add space before and after '..' operator, it threw "…
Praveen kumar
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0
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1 answer
How to match a String having metacharacters using regex matches function in Java
What could be the regular expression to match below String
String str = "\r\n regular ";
There is a
carriage return "\r", new line character "\n" and a space after .
My code is as…
Suvasis
- 1,451
- 4
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0
votes
1 answer
Replace Strings in java having metacharacters
I have two strings and want to replace one string from the other. The problem is that strings have meta characters.
E.g.
String string1 = "I am foo";
String string2 = "I am bar and I am foo. I am both.";
string2 = string2.replaceAll(string1, "");…
user2200660
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0
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2 answers
Regex in Java: a*
Do you know why in a simple regex pattern if put a*(quantifier) it does not match any result in the matcher even though it actually contains the character a; (in any case it should give back a result of having found an empty string as I am using…
Rollerball
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-1
votes
2 answers
Perl, pattern matching and metacharacters
I am trying to match two things which both are full of metacharacters that needs to be used as 'Literal' in my match pattern. \Q is suppose to quote all metacharacter in a string until \E...but it doesn't work.
Whats up with that?
this is the line…
-1
votes
1 answer
awk ignore the field delimiter pipe inside double quotes
I know this question is already answered but with comma as a separator. How to make awk ignore the field delimiter inside double quotes?
But My file is separated by pipe, when I use this in regex it act as a regex only and not getting proper output.…
Kalpesh
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-1
votes
2 answers
Filter using string with any possible content in BigQuery
I am a newbie using BigQuery.
I am building a query that I will share with several other people. Each person is responsible for different business units and I want them to be able to easily insert the name of their business units in this query.
I…
Rafael Pinheiro
- 393
- 4
- 16
-1
votes
1 answer
Matching string that contain Metacharacters with re.findall() and re.escape()?
What is the regular expression for matching a sentence that contains metacharacters ?
Following the senario :
I have a string : line = "He finally answer (after taking time to think (5 minutes) * sighs ; end)"
I want to match this part of the…
Julia
- 11
- 2
-1
votes
1 answer
Escaping meta characters in PHP
I was surprised to discover that the MySQL query
SELECT * WHERE name LIKE "%AFA_";
returns rows where name is SAFARI. To get it to match on the underscore, you have to do:
SELECT * WHERE name LIKE "%AFA\_";
Is there a PHP function that can do…
Scott C Wilson
- 19,102
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-1
votes
1 answer
String contains any but one character
I want to check if a String contains a } with any character in front of it except \.
As far as I know I can use . as a metacharacter in aString.contains(...) to allow any character at that position but I don’t know how to create something like a…
LeWimbes
- 517
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-1
votes
1 answer
Perl: quoting correctly all special characters
I have this sample string, containing 2 backslashes. Please don't ask me for the source of the string, it is just a sample string.
my $string = "use Ppppp\\Ppppp;";
print $string;
Both, double quotes or quotes will print
use Ppppp\Ppppp;
Using
my…
Claude
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