Oh Yes You Can Use Regexes to Parse HTML! For the task you are attempting, regexes are perfectly fine! It is true that most people underestimate the difficulty of parsing HTML with regular expressions and therefore do so poorly. But this is not some fundamental flaw related to computational theory. That silliness is parroted a … Read more
? can mean a lot of different things in different contexts. Following a normal regex token (a character, a shorthand, a character class, a group…), it means “Match the previous item 0-1 times”. Following a quantifier like ?, *, +, {n,m}, it takes on a different meaning: “Make the previous quantifier lazy instead of greedy … Read more
Use super secret operator (Negative match N) UPD: G2 – is in my example, as I extract two groups from each encounter. each encounter is “uuid” in g1 and g2 is second part I need second part here. that’s why $2$ template and g2. If your encounters in one group you ll most likely use … Read more
In Perl, in the substitution operator, as well as many other operators, you can substitute the delimiter for almost any punctuation character, such as s#/$## s=/$== s!/$!! Which one to use when is a matter of what you need at the time. Preferably you choose a delimiter that does not conflict with the characters in … Read more
The JSTL fn:replace() does not use a regular expression based replacement. It’s just an exact charsequence-by-charsequence replacement, exactly like as String#replace() does. JSTL does not offer another EL function for that. You could just homegrow an EL function yourself which delegates to the regex based String#replaceAll(). E.g. package com.example; public final class Functions { private … Read more
Not fully sure what exactly you are searching for… because it could be a dynamic url matcher or just smart regex. Here is a plunker with working example. It in fact 1) only builds the regex from the passed list of names… 2) shows urlMatcher in action The answer here would be: use the UrlMatcher. … Read more
Adapting the code from “How to remove double quotes on specific column from CSV file using Powershell script”: $csv = ‘C:\path\to\your.csv’ (Get-Content $csv) -replace ‘(?m)”([^,]*?)”(?=,|$)’, ‘$1’ | Set-Content $csv The regex (?m)”([^,]*?)”(?=,|$) is matching any ” + 0 or more non-commas + ” before a comma or end of line (achieved with a positive look-ahead … Read more
Get-Content produces an array of strings, where each string contains a single line from your input file, so you won’t be able to match text passages spanning more than one line. You need to merge the array into a single string if you want to be able to match more than one line: $text = … Read more
If you do not want to match mutiple dashes after eachother: ^[a-zA-Z0-9]+(-[a-zA-Z0-9]+)*$ This will match: a, a-a, aaa-a, aaa-a-aaa-a-aaa-a, etc But not: -, -a, a-, a–a, a-a-a-, a-a–a, etc.