I am not really good at regex.
Can someone help me with generating regex regarding this problem:
If I input lets say "an"
It should match Annie but not Stan or Jan.
I will just use the regex in my searching module.
Thanks.
\ban\B
You can use this.\b will make sure word starts with an and \B will makee sure it does not end with an.TO make it case sensitive use i flag.
or
\b[aA][nN]\B
You can use this:
^a|An
It is case insensitive
^an
Would match any string starting with an "an".
Answering your comment on the case sensitivity, it would depend on the regex parser. Ex with grep you can pass the -i flag.
There can be multiple ways to achieve it.
However, I would suggest you to spend only 30 minutes on http://regexone.com. Get some hands on it. This will really help to get head start on Regex.
Related
I made this very simple regex
extract("ProductCode",0,message)
And of course it's working but I have no idea how to make it case-insensitive. I tried to add 'i' flag like this
extract("productcode/i",0,message)
or like this
extract("/productcode/i",0,message)
nothing works.. no idea what I'm doing wrong. Please help
You can try the following syntax:
(?i)productcode(?-i)
This will make that part of your regex case insensitive.
You can dismiss the (?-i) if you want to apply it to the whole regex.
Good luck.
I have wrote this regex to help me extract some links from some text files:
https?:\/\/(?:.(?!https?:\/\/))+$
Because I am using golang/regexp lib, I'm not able to use it, due to my negation (?!..
What I would like to do with it, is to select all the text from the last occurance of http/https till the end.
sometextsometexhttp://websites.com/path/subpath/#query1sometexthttp://websites.com/path/subpath/#query2
=> Output: http://websites.com/path/subpath/#query2
Can anyone help me with a solution, I've spent several hours trying different ways of reproducing the same result with no success.
Try this regex:
https?:[^:]*$
Regex live here.
The lookaheads exist for a reason.
However, if you insist on a supposedly equivalent alternative, a general strategy you can use is:
(?!xyz)
is somewhat equivalent to:
$|[^x]|x(?:[^y]|$)|xy(?:[^z]|$)
With that said, hopefully I didn't make any mistakes:
https?:\/\/(?:$|(?:[^h]|$)|(?:h(?:[^t]|$))|(?:ht(?:[^t]|$))|(?:htt(?:[^p]|$))|(?:http(?:[^s:]|$))|(?:https?(?:[^:]|$))|(?:https?:(?:[^\/]|$))|(?:https?:\/(?:[^\/]|$)))*$
I am trying to make an if-then-else statement using RegEx. I want to match the text if it contains Monty and also contains Python. Also the text should get matched if Monty is not present in the text.
RegEx
(?(?=Monty)(?(?=Python).*|)|^.*).*$
Kindly help!
How about this:
(^(?!.*Monty(?!.*Python.*).*).*$|^.*Python.*Monty.*$)
This passes my tests, but let me know if it works for you.
I am not versed in lookahead regex but just tried to build the regex from what I understood from above description. Check the link to see if this is what you are trying to do.
try this instead
((?=Monty)((?=Python).*|)|^.*).*$
Our standards have changed and I want to do a 'find and replace' in say Dreamweaver(it allows for RegEx or we just got Visual Studio 2010, if it allows for searching by RegEx) for all the underscores and camelCase them.
What would be the RegEx to do that?
RegEx baffles me. I definitely need to do some studying.
Thanks in advance!
Update: A little more info - I'm searching within my html,aspx,cfm or css documents for any string that contains an underscore and replacing it with the following letter capitalized.
I had this problem, but I need to also handle converting fields like gap_in_cover_period_d_last_5_yr into gapInCoverPeriodDLast and found 9 out of 10 other sed expressions, don't like 1 letter words or numbers.
So to answer the question, use sed. sed -s is the equivalent to using the :s command in vim. So the example below is a command (ie sed -s/.../gc
This seemed to work, although I did have to run it twice (word_a_word will become wordA_word on the first pass and wordAWord on the second. sed backward commands, are just too magical for my muggle blood):-
s/\([A-Za-z0-9]\+\)_\([0-9a-z]\)/\1\U\2/gc
I recently had to approach a similar situation you asked about. Here is a regex I've been using in VIM which does the job for me:
%s/_\([a-zA-Z]\)/\u\1/g
As an example:
this_is_a_test becomes thisIsATest
I don't think there is a good way to do this purely with regex. Searching for _ characters is easy, something like ._. should work to find an _ with something on either side, but you need a more powerful scripting system to change the case of the character following the _. I suggest perl :)
I have a solution in PHP
preg_replace("/(_)(.)/e", "strtoupper('\\2')", $str)
There may be a more elegant selector criteria but I wanted to keep it simple.
I tried to make regex syntax for that but I failed.
I have 2 variables
PlayerInfo[playerid][pLevel]
and
Character[playerid]
and I want to catch only the second variable,I mean only the world what don't contain PlayerInfo, but cointains [playerid]
"(\S+)\[playerid\]" cath both words and (\S+[^PlayerInfo])\[playerid\] jump on some variables- they contais p,l,a,y ...
I need to replace in notepad++,all variables like Text[playerid] to ExClass [playerid][Text]
Couple Pluasible solutions.
List item
Notepad has a plugin called python script. Running regex from there
gives full regex functionality, the python version anyway, and a lot
of powerful potential beyond that. And I use the online python regex tester to help out.
RegRexReplace plugin helps create regex plugins in Notepad++, so when you do hit a limitation, you find out a lot quicker.
Or of course default to your alternate editor (I'm assuming you have
one?) or this online regex tool is absolutely amazing. You
can perform the action on the text online as well.
(I'd try to build a regex for you, but I'm a bit lost as to what you're looking for. Unless the Ivo Abeloos got it. If you're still coming up short, maybe a code example along with values displayed?)
Good luck!
It seems that Notepad++ support negative lookbehind since v6.
In notepad++ you could try to replace (.+)\[(.+)\] with ExClass\[\2\]\[\1\]
Try to use negative lookbehind.
(?<!PlayerInfo)\[playerid\]
EDIT: unfortunately notepad++ does not support negative lookbehind.
I tried to make a workaround based on the following naive idea:
(.[^o]|[^f]o)[playerid]
But this expression does not work either. Notepad++ seems to fail in alternative operator. Thus the answer is: it is impossible to do exactly what you want. Try to solve the problem in other way or use alternative tool.