Loading regular expression patterns from external source?

Loading regular expression patterns from external source?

By : Tharin Nilsri
Date : November 19 2020, 12:41 AM
it fixes the issue I am not sure what you want but have a look at this.:
If you have a file called input.txt containing \d+
code :
import re
print re.findall(r""+f.readline(),x)

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Regular expression adding something in between patterns, while preserving the patterns in between

Regular expression adding something in between patterns, while preserving the patterns in between

By : Ehsan Ghazanfari
Date : March 29 2020, 07:55 AM
like below fixes the issue I suppose you forgot about 'or' operator in the source (located right before third MAX_). There is alt. version of regexp - it's more generic (because it can match and safely replace both 'and' & 'or' operators) and it has been little more optimized (because it doesn't use look-ahead/look-behind syntax):
code :
$result = preg_replace('/(\s+(and|or)\s+)(\(*MAX_)/', '<br/>$1<br/>$2', $str);
regular expression with an array of patterns (in R)

regular expression with an array of patterns (in R)

By : Ying Chen
Date : March 29 2020, 07:55 AM
hop of those help? I'd like to identify all elements of a string that match an array of patterns. How do I do this? I'd like to avoid clunky for-loops, because I'd like to have the result be invariant to the order in which I specify the patterns. , Use sapply:
code :
> sapply(regex, grepl, words)
         a     b
[3,]  TRUE  TRUE
> grepl(paste(regex, collapse = "|"), words)
C# regular expression patterns

C# regular expression patterns

By : user1985428
Date : March 29 2020, 07:55 AM
seems to work fine Are you actually looking through the 'group' values of the match? The match will return EVERYTHING that matched, not just the things in "()" and group '0' will be everything as well.
This works as expected for me:
code :
string String1="[q:6][ilvl:70](randomword)";

Regex rules_1 = new Regex(@"(?i)\[ilvl:([0-9]{1,2})\]");
Regex rules_2 = new Regex(@"(?i)\[q:([0-9]{1,2})\]");
Regex rules_3 = new Regex(@"(?i)\(([a-zA-Z]+)\)");

var match1 = rules_1.Match(String1);
var match2 = rules_2.Match(String1);
var match3 = rules_3.Match(String1);

var value1 = match1.Groups[1].Value;
var value2 = match2.Groups[1].Value;
var value3 = match3.Groups[1].Value;
Regular expression to match one or more patterns matching another regular expression

Regular expression to match one or more patterns matching another regular expression

By : Prashanth Netha
Date : March 29 2020, 07:55 AM
around this issue I am using regular expressions for my django url configurations. I have the following regex:
code :
repeatable = r'[X]{1}[A-Z0-9]{3}:[A-Z0-9]{1}[A-Z09.-]{1,4}'
url_regex = r'^myapp/prices/?(' + re.escape(repeatable) + r')(\+' + re.escape(repeatable) + r')*/?([0-9]{0,3})/?$'

url(url_regex, views.prices, name='prices')
url(r'^myapp/prices/?([X]{1}[A-Z0-9]{3}:[A-Z0-9]{1}[A-Z09.-]{1,4})(\+?[X]{1}[A-Z0-9]{3}:[A-Z0-9]{1}[A-Z09.-]{1,4})*/?([0-9]{0,3})/?$', views.prices, name='prices'),
Finding two patterns in regular expression

Finding two patterns in regular expression

By : RaGu
Date : March 29 2020, 07:55 AM
hope this fix your issue To parse HTML in C#, you should use a HTML parser, like HtmlAgilityPack.
As for "combining" 2 patterns with capturing groups and backreferences, you should always remember that the capturing groups are numbered from left to right regardless of alternation operators, so, in your pattern, there are 4 capturing groups (with ID = 1, 2, 3, 4), thus, you need to replace \\1 with \\3.
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