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Is is possible to detect a valid regular expression with another regular expression? If so please give example code below.
Started by psytek on
, 6 posts
by 6 people.
Answer Snippets (Read the full thread at stackoverflow):
However: if you loosen written a wonderful treatise on regex engine... .
True regular this is a necessary requirement for regular expressions the answer is no.
Good question.
It now matches itself (the short version at least).
Edge assertions.
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Does anyone have any good link to a website or a good tool to create regular expressions rather than break your head to create one. The tool should be able to create regular expressions by simply selecting some sort of pattern text. For e.g If I want ...
Answer Snippets (Read the full thread at stackoverflow):
But you can make use of software with these regexes:
They'll probably look... .
But I'd recommend putting some time in and learning regular regular expressions without having any clue about them doesn't work.
Expresso has a regex GUI builder.
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I am pretty new to regular expressions. I want to write a regular expression which validates whether the given string has only certain characters. If the string has any other characters than these it should not be matched.
The characters I want are:
&...
Started by Teja Kantamneni on
, 5 posts
by 5 people.
Answer Snippets (Read the full thread at stackoverflow):
/^[&':,/-().#";A-Za-z0-9]*$/
There are two main approaches to construct a regular expression.
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Ask your Facebook Friends
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What was the grimmest tennis court you regularly played on, or, in the alternative, what is the grimmest tennis court you currently play on?
Me, I play most Fridays during my noon lunch work hour at the Echo Park courts just outside Downtown L.A. right...
Started by SVP on
, 14 posts
by 10 people.
Answer Snippets (Read the full thread at tennis-warehouse):
Thanks for the picture but I have to tell you the court looks pretty good to me, far.
It was pretty obvious by the way.
Good times! I have to go back to the late 1960s for my highschool courts .
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I want to make my user profiles 'pretty' as it were. Here is the regular URL:
user.php?user=UserName
I want this to become:
user/Username
Please help :) Im a .htaccess newbie.
Started by Ben Shelock on
, 3 posts
by 3 people.
Answer Snippets (Read the full thread at stackoverflow):
RewriteRule ^user/(.+)$ user.php?user=$1 [L,QSA] Try these directives:
RewriteEngine on RewriteRule ^user/([^/]+)$ user.php?user=$1 [L,QSA]
This rule rewrites any request with a URL path of the form /user/ foobar internally to /user.php?user= foobar ... .
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Google and Bing do not support regular expressions while searching.
Is there any search engine that does support regular expressions?
Started by ebattulga on
, 3 posts
by 3 people.
Answer Snippets (Read the full thread at superuser):
Doing a regex support across all of them is pretty much impossible given the current state.
Google and Bing does not actually.
Google Code Search allows you to use regular expressions.
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I'm pretty new to regular expressions, but I'm sure a regex would give me something much more elegant than anything I could do with string methods.
I've got a hyperlink in the form of:
<a href="http://server.com/default.aspx?abc=123">hello</a...
Started by TesterTurnedDeveloper on
, 8 posts
by 8 people.
Answer Snippets (Read the full thread at stackoverflow):
You can also click a regular expression to see an example slide down with a neat jQuery animation, but I digress references as well as a narrative style....
It's not quite done but it's pretty close.
On a clean & concise .NET regex reference.
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Is there any regular expression that will, for some input string, search for a match forever?
Started by Horace Loeb on
, 8 posts
by 8 people.
Answer Snippets (Read the full thread at stackoverflow):
I imagine, it is not possible to....
Http://en.wikipedia.org/wiki/Halting_problem
According to this question , every regular expression halts.
Not in the sense you are describing, you can have some very inefficient regular expressions out.
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Is is possible to construct a regular expression that rejects all input strings?
Started by Kasper on
, 11 posts
by 11 people.
Answer Snippets (Read the full thread at stackoverflow):
Not sure if I understood, since I always thought of regular expression of a way to match strings, what exactly are you trying to solve?
You could do a regular expression that catches everything implementations would reject these patterns....
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Hi Guys, I'm fairly new to ruby, and am configuring IRB. I like pretty print (require 'pp'), but it seems a hassle to always type pp for it to pretty print it. What I'd like to do is make it pretty print by default, so if i have a var , say, 'myvar', ...
Answer Snippets (Read the full thread at stackoverflow):
These posts explain ....
Check out this addition to pretty_print::CoreExtensions::Numeric::Bytes
Pretty printing objects by default in irb is exactly what hirb was made to do.
And add
require 'pp'
it will be loaded each time you start irb .
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