I tried for few hours to find the right syntax for making a regex query that returns reviews from 2-3 different projects but I failed and decided to crowdsource the task ;)
The search is documented at https://review.openstack.org/Documentation/user-search.html and mentions possible use of REGEX,... but it just didn't work.
Task: return all CRs from openstack-infra/gerritlib and openstack-infra/git-review projects from https://review.openstack.org
Doing it for one project works well project:openstack-infra/gerritlib
Ideally I would like to look for somethign like ^openstack-infra\/(gerritlib|git-review), or at least this is the standard regex syntax.
Still, I found impossible to use parentheses so far, every time I used them it stopped it from returning any results.
1) You don't need to escape the "/" character.
2) You need to use double quotes to make the parentheses work.
So the following search should work for you:
project:"^openstack-infra/(gerritlib|git-review)"
Related
I'm trying to keep lines that contain the word "NOA" in a column A which has many multi-line cells as can be viewed in this Google Spreadsheet.
If "NOA" is present then, I would like to keep the line. The input and output should look like the image which I have "working" with too-many helper cells. Can this be combined into a single formula?
Theoretical Approaches:
I have been thinking about three approaches to solve this:
ARRAYFORMULA(REGEXREPLACE - couldn't get it to work
JOIN(FILTER(REGEXMATCH(TRANSPOSE - showing promise as it works in multiple steps
Using the QUERY Function - unfamiliar w/ function but wondering if this function has a fast solution
Practical attempts:
FIRST APPROACH: first I attempted using REGEXEXTRACT to extract out everything that did not have NOA in it, the Regex worked in demo but didn't work properly in sheets. I thought this might be a concise way to get the value, perhaps if my REGEX skill was better?
ARRAYFORMULA(REGEXREPLACE(A1:A7, "^(?:[^N\n]|N(?:[^O\n]|O(?:[^A\n]|$)|$)|$)+",""))
I think the Regex because overly complex, didn't work in Google or perhaps the formula could be improved, but because Google RE2 has limitations it makes it harder to do certain things.
SECOND APPROACH:
Then I came up with an alternate approach which seems to work 2 stages (with multiple helper cells) but I would like to do this with one equation.
=TRANSPOSE(split(A2,CHAR(10)))
=TEXTJOIN(CHAR(10),1,FILTER(C2:C7,REGEXMATCH(C2:C7,"NOA")))
Questions:
Can these formulas be combined and applied to the entire Column using an Index or Array?
Or perhaps, the REGEX in my first approach can be modified?
Is there a faster solution using Query?
The shared Google spreadhseet is here.
Thank you in advance for your help.
Here's one way you can do that:
=index(substitute(substitute(transpose(trim(
query(substitute(transpose(if(regexmatch(split(
filter(A2:A,A2:A<>""),char(10)),"NOA"),split(
filter(A2:A,A2:A<>""),char(10)),))," ","❄️")
,,9^9)))," ",char(10)),"❄️"," "))
First, we split the data by the newline (char 10), then we filter out the lines that don't contain NOA and finally we use a "query smush" to join everything back together.
I have virtually no knowledge of how to use Source Graph but I do know what Source Graph is and what RegEx is and its application across platforms. I am trying to learn how to better search for strings, variables, etc. in Source Graph so I can solve coding issues at work. I am not a coder/programmer/engineer but I have some general knowledge of programming in C and Python and using Query Languages.
I have gone to Source Graph's instructional page about RegEx but I honestly have a hard time understanding it.
Example:
I am trying to find "Delete %(folder_name)s and %(num_folders)s other folder from your ..." without the actual quotes and ellipses.
That is how I receive the code at work but this apparently is not how it is represented in Source Graph in its source file.
If I copy and paste that above line into Source Graph, I get no returns.
Here is what I found how the source file actually looks like in Source Graph:
"Delete \u201c%(folder_name)s\u201d and %(num_folders)s other folder from your ..." , again without actual quotes and ellipses.
I would have no idea that the \u201c and \201d were there in the original code. Is there a way around this?
What I usually have to work with and figure out how to find in Source Graph are singular variables or strings:
%(num_folders)s
This is a problem because the fewer items I have for searching, the harder it is to hunt down their source. I don't know who the author/engineer is until I find the code in Source Graph and check the blame feature (sadly it's a little disorganized at my work).
Sorry if this doesn't make any sense. This is my very first Stack Overflow post.
I can't the snippet you mentioned on sourcegraph.com, so I assume you are hosting Sourcegraph yourself.
In general, you could search for a term like Delete \u201c%(folder_name)s without turning on regular expressions to get literal matches. If you want to convert this into a regular expression, you would need to escape it like this:
Delete \\u201c%\(folder_name\)s
If %(folder_name) is meant to be a placeholder for any other expression, try this one instead:
Delete .*s and .*s other folder from your
https://regex101.com/ is my personal recommendation for learning more about how regular expressions work.
Using C++, I've managed to follow the Xapian tutorial found here.
https://getting-started-with-xapian.readthedocs.io/en/latest/practical_example/index.html#
The indexer program works as I expect it to, but the search program - https://getting-started-with-xapian.readthedocs.io/en/latest/practical_example/searching/building.html - works only with a caveat.
When, for example, I run the equivalent of:
python2 code/python/search1.py db Dent watch
No matches are found, unless I instead write the following:
python2 code/python/search1.py db '"Dent" "watch"'
Which works as well as I expect. The problem is in not quite knowing why it works (though I know the '"' symbol is a search query modifier of some kind), and in how I should aim to prepare queries for processing.
For example, does the Xapian::QueryParser class constructor have an option to add the '"' symbols for me? Or should I preprocess input before I try to retrieve matches?
For the record, using the following queryParser.parse_query(input, queryParser.FLAG_PHRASE) appear to fix the issue I had.
I am new to grails and so far i have only been able to use simple filters. I want to use filter in an efficient manner.
(I am using grails 2.4.3, with jdk_1.6)
I want to create a filter to allow accessing AppName/ and AppName/user/login and i could not get it right! I wanted to use regex but i am not getting it right!
i tried this
loggedInOnly(uri:'/**',uriExclude :"*.css|*.js|*image*|/|/user/login"){
before = {
println "### ###### #### #"
}
}
and i also tried to revers the regex parameter, but i am getting no luck! I searched all of google but i could not find a single thread to tell me how filter regex work!
i know i could create xxxx(controller:'*', action:'*') filter then use the controllerName and actionName parameters to check! But there gotta be a better way!
My question in a nutshell: How does regex work in filters?
First, take a closer look at the documentation. Notice that uri and uriExclude are ant paths and not regular expressions. Keeping that in mind if you look how ant paths function you will see they aren't capable of logical ors.
So, with all of that in mind it's back to using enabling regex and using the find attribute instead.
loggedInOnly(regex: true, find: '(.*.css|.*.js|.*image.*|\\/|\\/user\\/login)', invert: true){
before = {
...
}
}
Notice I hae used invert to have this filter apply to anything that doesn't match any of the patterns inside the find. Also, I wrote this off the top of my head so you may have to spot check the regular expression in your application (I did check it using groovy web console to make sure I didn't really mess up the syntax).
Hope this helps.
I am using the maven replacer plugin and I've run into a situation where I have a regular expression that matches across lines which I need to run on the input file until all matches have been replaced. The configuration for this expression looks like this:
<regexFlags>
<regexFlag>DOTALL</regexFlag>
</regexFlags>
<replacements>
<replacement>
<token>\#([^\n\r=\#]+)\#=([^\n\r]*)(.*)(\#default\.\1\#=[^\n\r]*)(.*)</token>
<value>#$1#=$2$3$5</value>
<replacement>
<replacements>
The input could look like this:
#d.e.f#=y
#a.b.c#=x
#h.i.j#=aaaa
#default.a.b.c#=QQQ
#asdfasd.fasdfs.asdfa#=23423
#default.h.i.j#=234
#default.RR.TT#=393993
and I want the output to look like this:
#d.e.f#=y
#a.b.c#=x
#h.i.j#=aaaa
#asdfasd.fasdfs.asdfa#=23423
#default.RR.TT#=393993
The intention is to re-write the file, but without the tokens with a #default prefix, where another token without the prefix has already been defined.
#default.a.b.c#=QQQ and #default.h.i.j#=234 have been removed from the output because other tokens already contains a.b.c and h.i.j.
The current problem I have is that the replacer plugin only replaces the first match, so my output looks like this:
#d.e.f#=y
#a.b.c#=x
#h.i.j#=aaaa
#asdfasd.fasdfs.asdfa#=23423
#default.h.i.j#=234
#default.RR.TT#=393993
Here, #default.a.b.c=QQQ is gone, which is correct, but #default.h.i.j#=234 is still present.
If I were writing this in code, I think I could probably just loop while attempting to match on the entire output, and break when there are no matches. Is there a way to do this with the replacer plugin?
Edit: I may have over simplified my example. A more realistic one is:
#d.e.f#=y
#a.b.c#=x
#h.i.j#=aaaa
#default.a.b.c#=QQQ
#asdfasd.fasdfs.asdfa#=23423
#default.h.i.j#=234
#default.RR.TT#=393993
#x.y.z#=0
#default.q.r.s#=1
#l.m.n#=8.3
#q.r.s#=78
#blah.blah.blah#=blah
This shows that it's possible for a default.x.x.x=y to precede a x.x.x=y token (as #default.q.r.s#=1 preceedes #q.r.s#=78`), my prior example wasn't clear about this. I do actually have an expression to capture this, it looks a bit like this:
\#default\.([^\n\r=#|]+)#=([^\n\r|]*)(.*)#\1#=([^\n\r|]*)(.*)
I know line separators are missing from this even though they were in the other one - I was experimenting with removing all line separators and treating it as a single line but that hasn't helped. I can resolve this problem simply by running each replacement multiple times by copying and pasting the configurations a few times, but that is not a good solution and will fail eventually.
I don't believe you could solve this problem as is, a work-around is to reverse the order of the file top to bottom, perform lookahead regex and then reverse the result order
pattern = #default\.(.*?)#[^\r\n]+(?=[\s\S]*#\1#) Demo
another way (depending on the capabilities of "Maven") is to run this pattern
#(.*)(#[\s\S]*)#default\.\1.*
and replace with #$1$2 Demo in a loop until there are no matches
then run this pattern
#default\.(.*)#.*(?=[\s\S]*\1)
and replace with nothing Demo in a loop until there are no matches
It doesn't look like the replacer plugin can actually do what I want. I got around this by using regular expressions to build multiple filter files, and then applying them to the resource files.
My original goal had been to use regular expressions to build a single, clean, and tidy filter file. In the end, I discovered that I was able to get away with just using multiple filters (not as clean or tidy) and apply them in the correct order.