capture-group Questions

Javascript – How can I replace all instances of 'x' within a string as long as 'x' is within Math.sin(), Math.cos(), or Math.tan()?

May 28, 2024
Brian
3 Answers

I am trying to write a JavaScript replaceAll() with a RegEx that will replace every value of x with period*x, as long as it is within Math.sin() or Math.cos() or Math.tan() I tried this: let fx = 'Math.tan(Math.sin(Math.cos(x)*x)*x)'; const periodRegEx…

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Javascript – Is it possible to recursively capture a FINITE number of matches (all of the same format) using ECMA RegEx?

September 18, 2023
NerdyDeeds
2 Answers

For instance, say we're looking at a query string, all-lowercase, all non-numeric, no special character (just [a-z] and =): ?some=querystring&ssembly=containing&n=indeterminate&mount=of&ll=potentially&ccordant=matches Let us take as a given we know there will be three key-value pairs we wish to capture, and even…

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Javascript – Replace the string after second forward slash using a RegEx

July 12, 2023
ReynierPM
2 Answers

Having a string (URL path) as for example: /this/is/some/url I would like to remove the first occurrence of / and change the string after the second forward slash (in the example some) by another string let's say is. The result…

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MySQL Regexp to repeat CSV limits at 340 commas

March 8, 2023
Aun Rizvi
2 Answers

I am trying to create regexp to validate comma separated name value pairs which starts from ID like so select 'ID,2190,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def,abc,def' regexp '^ID,[1-9][0-9]*(,[^,]+,[^,]*)*$' the above query will output 0 istead of 1, but if i reduce a pair ,abc,def this…

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