sregex | backtracking NFA/DFA-based Perl | Regex library
kandi X-RAY | sregex Summary
kandi X-RAY | sregex Summary
libsregex - A non-backtracking NFA/DFA-based Perl-compatible regex engine library for matching on large data streams.
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QUESTION
when i use boost::regex_search function to do something like this
...ANSWER
Answered 2020-Dec-11 at 04:18Assuming the question is serious:
the regex matches
^
(start of input)What looks like you intended as one or more of the "CJK Unified Ideographs" block (though only from the 1.0.1 Unicode standard).
However, this is not what is parsed. (Instead, indeed it parses as regular hex escapes which does match
1
).The docs tell me that you might have wanted
\x{dddd}
but that requires Unicode support.Digging in more docs tell me that
There are two ways to use Boost.Regex with Unicode strings:
Rely on wchar_t(lists a bunch of limitations and conditions)
Use a Unicode Aware Regular Expression Type.May I suggest the latter
one or more numerical digits (according to the locale's character classicification)
(#?)
might have been intended as a comment ((?#)
) but as spelled optionally matches a single#
characterfollowed by
$
(end of input)
That's not in your input, so it shouldn't match.
Off Topic?Besides, since this is a fully anchored pattern (^$
) it would only make sense
with regex_match
, not regex_search
.
The while loop is a weird idea, because the input never changes, so neither will
the search result. If there's a match, the loop always breaks. Your while
amounts to a more confusing if
statement.
Here's a program that codes three switchable approaches with three different regexes.
The approaches are BOOST_SIMPLE, BOOST_UNICODE and STANDARD_LIB.
The first regex is yours, the second with \x{XXXX}
escapes instead and the
third is using the named character class \p{InCJK_Unified_Ideographs}
.
The result is:
- Boost + Unicode approach works correctly (except with your faulty regex)
- Standard library (on my GCC 10 install) as well as Boost Simple appear to accept the named character class. I'm doubtful that it actually matches correctly, so I guess it will just fail to match.
QUESTION
I have an 800+ page document created by a modelling program. This document consists primarily of a series numbered sentences (not numbered lists). There can be 10,000 numbered lines which will be converted into 5000-7000 numbered lists of varying lengths.
The VBA for Word script (see below) searches for the first numbered paragraph following and un-numbered paragraph, then looks for the last numbered paragraph before an un-numbered paragraph, then converts the range to a numbered list. This sequence is repeated till the end of the document.
The procedure works as expected. The problem is, it consumes 65-95% of CPU, most of the physical memory and takes 5-15 hours to run.
Any thoughts on improving the performance by at least a magnitude (well at least half or quarter the time) would be greatly appreciated.
Sample Document Before Processing:
Sample Document After Processing:
VBA Procedure:
...ANSWER
Answered 2020-Feb-28 at 02:42This may be one solution. You may have to tune the regex pattern depending on your document. Performance seems reasonable:
QUESTION
I was trying to insert a data struct into a vector everytime a match is detected, but i am failing even in compiling. The code is next:
...ANSWER
Answered 2018-Feb-22 at 08:42You should make the action a lazy actor. Your Data
constructor call isn't.
QUESTION
In this code filter, search and pagination not functioning i have tried myself but it didn't work so please check the code give me any solution or any reference regarding to this query. Even any related to this code files or docs it will be helpful for me to pursue the concept
...ANSWER
Answered 2017-Jun-19 at 10:18I am doing it like:
QUESTION
I Got error in the datatable in mongodb please give solution... If Anyone have reference source code send me it will helpful for me....................................................................................................................................................................................
...ANSWER
Answered 2017-Jun-16 at 09:36Those are not errors, are Notices:
QUESTION
I'm probably being very stupid here...
I have two JavaScript functions that are practically identical except each one refers to a different element.
The idea is to show and hide a toast/notification when the document loads.
For one element (errorexplanationcontainer), it works... For the other (alert), it doesn't...
CODE FOR errorexplanationcontainer (WORKS)
...ANSWER
Answered 2017-May-29 at 12:54Use window.addEventListener
instead of overwriting window.onload
.
For errorexplanationcontainer
,
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