Regular expressions are a declarative language, mainly used for pattern matching within strings. Please include a tag specifying the programming language you are using, together with this tag.
2
votes
1answer
29 views
More Pythonic version of finding substring with one glob-like expression
Giving the following example list the task is: find out whether the
second expression is in the first one. * shall be considered as a
wildcard for any ...
0
votes
2answers
48 views
Preg_match pattern for user input filtering
My users may need to supply a 'disease category' to my site. I need to let them use all alphanumeric characters, hyphens and single quotes. Would someone review this to see if they feel it's ...
5
votes
1answer
31 views
Negative Lookbehind Regex
I have the following code which attempts to match all strings like "*SOMESTRING" (which can include numeric values), but not "*SOMESTRING*". For this I am using a negative lookahead as follows;...
0
votes
0answers
23 views
Regular expression to match 25 IP addresses in Google Analytics [migrated]
I was having issues with a RegEx. Mainly I wanted to create a filter to only find these 25 IP addresses in Google Analytics:
216.54.215.0
216.54.215.1
216.54.215.2
...
216.54.215.24
I first ...
2
votes
1answer
41 views
Is this `img` creator decently secure from XSS?
This is being used now, seems decent to me but I'm curious.
...
2
votes
1answer
17 views
Determine if a path matches a pattern
I have been struggling with a regular expression involving path names. Immediately, this is a bit troublesome, owing to the embedded / in the pattern, but braces to the rescue.
First the convention ...
7
votes
2answers
187 views
Check whether a list of list of string fits a regex efficiently
I have the following structure for my object:
Word (Object)
Word (String)
List<Symbol>
Symbol (Object)
...
4
votes
1answer
64 views
Breaking after one of several string replaces occur
I have a script that matches a string against ~20 different regexs for the purpose of changing it. They are ordered and formed that the string will only ever match against one. How can I avoid ...
7
votes
3answers
89 views
VB6/VBA Declaration (Dim) Syntax Parser
As part of a project I'm working on, I've implemented a class that encapsulates the syntax for a vb6/vba Dim statement.
Given a line of code, the ...
1
vote
0answers
30 views
VerbalExpressions in Scala
I forked the original implementation of VerbalExpressions in Scala here: https://github.com/pathikrit/ScalaVerbalExpressions
I am looking forward to these things in the code review:
...
1
vote
2answers
43 views
Parsing BLAST output in XML format using Regular Expression
There many other better ways to parse BLAST output in .xml format, but I was curious to try using regex, even if it is not so straightforward and common. Here is the code how to extract translated ...
5
votes
1answer
46 views
Combining two indexOf and regex in to one
I have the following code that splits a combination of names on either the word and or the & ampersand:
...
5
votes
3answers
280 views
Regex match for a string in a URL
I feel like there is too much repetitive code going on here. All I am doing is doing a basic regex match for a string in the URL. If a match is found, I find an li with a class (.index, .grid, .type) ...
4
votes
2answers
48 views
Efficient use of regular expression and string manipulation
The following is my solution to Java vs C++. I think the way I have used the re library is inefficient, and possible erroneous as I am getting tle.
...
2
votes
1answer
77 views
4
votes
1answer
68 views
Converting snake_case to CamelCase
Is there an effective way, maybe with regex, to change the following text pattern?
I have a string like abc_def_ghi_jkl. I want to replace it to ...
1
vote
1answer
116 views
Is this a safe way to parse out HTML tag attributes?
I needed a super simple parser to get HTML attributes and their values. I didn’t want to load a big library or anything so I made this.
I realize I am making assumptions here, mainly:
Attribute ...
3
votes
1answer
37 views
How to simplify Regex with Data.Text?
This function tells that elements of content either (maybe) match regexes that you like or match regexes that you don't like.
This messy code requires ...
2
votes
1answer
28 views
Parsing playlists efficiently
I have this regexp working, simple, but I feel like it may not be the best way to code it. Basically, I have a playlist separated by line breaks returned as tcp data like so:
...
11
votes
4answers
1k views
What would be preferred aesthetically and performance wise?
Which one of these two would you prefer writing in your code?
This:
...
1
vote
4answers
137 views
Best way to comment regex
Regular expressions are one of the worst aspects of debugging hell. Since they are contained in string literals, It's hard to comment how they work when the expressions are fairly long.
Say I have ...
2
votes
2answers
110 views
Speeding up and fixing phone numbers from CSVs with Regex
I've hodgepodged together an attempt to extract all phone numbers from all CSVs in a directory, regardless of where they are and what format they're in. I want all phone numbers to be printed to a ...
4
votes
1answer
38 views
Communicating between plugins whilst maintaining context in Javascript
I'm making some changes to a JavaScript plugin on a site I've been made steward over. This main plugin has it's own sub-plugins and I'm trying to make certain aspects modular.
Currently, I'm ...
6
votes
1answer
137 views
BBCode to HTML converter using functional programming
I was inspired to write a BBCode to HTML converter as I'm currently learning functional programming. I wanted achieve functional cohesion. jsFiddle
I'd like feedback on:
structuring of the code. ...
4
votes
2answers
60 views
Packaging a single-file Python copy-tool
I'm currently working on a very simple one-file project:
Lumix provides the possibility for the camera TZ41 (and others) to load GPS data and tourist information from a DVD to a SD-card so that you ...
3
votes
1answer
44 views
Generate regular expression based on inputted number
This is my first PHP script (although I like to think I'm a good general coder).
The script accepts a number from the user, uses it to generate a regular expression, and then returns all dictionary ...
6
votes
2answers
73 views
Performance tuning on a text file to object conversion
I'm using an API which returns text in the following format:
...
7
votes
4answers
306 views
Bring phone numbers in consistent format
I'm using this code to bring my phone numbers in a consistent format.
Desired: +(country code)phone number
Possible patterns:
...
2
votes
1answer
77 views
Check for invalid name
I'm trying to write a regular expression to check names for invalid entries. Basically I'm trying to eliminate people entering random junk as their name. I know I can't completely eliminate it but I'm ...
1
vote
0answers
15 views
How can I clean up this hack to scrape paths from a Gruntfile?
As a part of my Tabv Vim plugin (which at this stage is nothing more than a pitiful rag-tag assortment of half-baked hacks), I have a function which attempts to guess the directory paths for main ...
4
votes
2answers
112 views
Extract version string from text file with Powershell
I need to pull the version # out of a Vim script that might look something like:
...
1
vote
1answer
64 views
1-line conditional statement needs to be trimmed down
I have this conditional statement with use of regex:
...
10
votes
1answer
102 views
A regular expression parsing library in C
I've created a regular expression (regex) parsing library in C, and would like some feedback on it. Speed is really important to me, but any and all suggestions are acceptable.
...
1
vote
1answer
142 views
All possible values that will match a regular expression
This is a similar question to this, but I am looking for the set of all possible values that will match a regular expression pattern.
To avoid an infinite set of possible values, I am willing to ...
6
votes
2answers
75 views
Another regex subset matcher
After reading @JavaDeveloper's recent question, I was inspired1 to try my hand at writing code to accomplish the same task.
The "rules" for this code (i.e., its intent) is to match a subset of ...
5
votes
1answer
113 views
Regex parser implementing dot, star and question mark
Regex parser which follows the following rule
. (dot) means a any single character match
* (star) means 0 or more ...
3
votes
2answers
135 views
Counting the words in a textarea
I've two working ways to do so, but which one should I use?
Common part: var textarea = document.getElementById("textarea");
First way:
...
10
votes
1answer
86 views
Locating matching files with input folder and file prefix
This is my first more-than-1-line script. It takes an input folder and a file prefix and gets all the matching files. For the first of the files, the script grabs the first line and appends an extra ...
3
votes
2answers
101 views
7
votes
1answer
249 views
HTTP Authorization header parser
I'm writing a parser for HTTP Authorization header (see RFC2616#14.8 and RFC2617#1.2). Note that I explicitly don't care about the base64-encoded syntax used by HTTP Basic authentication. I'm only ...
2
votes
2answers
314 views
Whitelist HTML tags Microsoft Sanitizer and custom Regex
I have the following code which I have written due to the fact the Microsoft's Sanitizer is now to aggressive.
What I'm trying to do is as follows.
Create a whitelist of HTML tags I want to keep
...
2
votes
1answer
129 views
Dice notation roller in JavaScript
I have the following function, intended to take standard dice notation (XdY+Z) and return a (sort of) random number based on the input. Are there any bugs/bad ideas/optimizable sections I am missing?
...
10
votes
2answers
379 views
Matching script tags with regexes
Like anything that shouldn't be done, I decided to see if it is possible to match <script> tags robustly using regexes in PHP. Since there is no arbitrary ...
5
votes
1answer
866 views
Getting data correctly from <span> tag with beautifulsoup and regex
I am scraping an online shop page, trying to get the price mentioned in that page. In the following block the price is mentioned:
...
5
votes
1answer
159 views
Trying multiple regexes against a single string
I have a huge list of regexes (>1,000 but <1,000,000) that I want to test against (many) single strings.
It is unlikely and unintended that more than one such expression would match a single ...
7
votes
5answers
464 views
Reading from text file with RegexMatch
Below is the method that I have written for reading from a text file. While reading, I need to match line string to given regex and if it matches then I need to add the line string to a collection.
...
3
votes
1answer
143 views
6
votes
1answer
190 views
Calculate query coverage from BLAST output
I have a BLAST output file and want to calculate query coverage, appending the query lengths as an additional column to the output. Let's say I have
2 7 15
...
8
votes
2answers
272 views
Recursive Regular Expressions
I want to first search for a specific regular expression.
If it is not found then I would like to search for another regular expression
If that one is also not found then I would like to search for a ...
0
votes
2answers
2k views
Remove a parameter and its value from URL's query string
I'm coding an algorithm to remove a parameter (let's call it foo) from URL strings.
Of course, after the foo parameter removal, ...
