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Regular Expressions
A regular expression (shortened as regex or regexp also referred to as regular expression) is a sequence of characters that specifies a search pattern.
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I scraped 89 job postings to find out how my salary parser was lying to me
northbell
northbell
northbell
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for Apify
Sep 1
I scraped 89 job postings to find out how my salary parser was lying to me
# webscraping
# javascript
# regex
# debugging
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9 min read
Four filters returned nothing and I read all four as nothing being there
Mahiro Hirakawa
Mahiro Hirakawa
Mahiro Hirakawa
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Sep 4
Four filters returned nothing and I read all four as nothing being there
# regex
# debugging
# testing
# shell
6 Â reactions
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3 min read
Stop Guessing: A Free Regex Tester That Actually Explains Your Pattern
Sarfaraz
Sarfaraz
Sarfaraz
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Aug 26
Stop Guessing: A Free Regex Tester That Actually Explains Your Pattern
# regex
# webdev
# javascript
# productivity
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3 min read
Regex Against a PDF: The One Endpoint That Skips OCR Entirely
PDF4me
PDF4me
PDF4me
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Aug 20
Regex Against a PDF: The One Endpoint That Skips OCR Entirely
# api
# pdf
# regex
# automation
Add Comment
6 min read
The Regex That Took Down Cloudflare for 27 Minutes
Brad Penney
Brad Penney
Brad Penney
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Aug 13
The Regex That Took Down Cloudflare for 27 Minutes
# regex
# computerscience
# security
# programming
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2 min read
Debugging a 41-second regex hang with a regex tester in 2026
AI Dev Hub
AI Dev Hub
AI Dev Hub
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Aug 11
Debugging a 41-second regex hang with a regex tester in 2026
# debugging
# performance
# regex
# tools
Add Comment
6 min read
Stop letting your AI guess: The case for deterministic Regex in MCP
Renato Marinho
Renato Marinho
Renato Marinho
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Aug 6
Stop letting your AI guess: The case for deterministic Regex in MCP
# ai
# security
# regex
# programming
1 Â reaction
Add Comment
4 min read
Parsing Trading Data With Regex: Test a Whole Suite of Cases at Once, Not One String
Max
Max
Max
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Jul 30
Parsing Trading Data With Regex: Test a Whole Suite of Cases at Once, Not One String
# regex
# python
# webdev
# tutorial
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4 min read
The Regex Bug That Passes Code Review, Passes Tests, and Takes Down Prod
Tyler Francis
Tyler Francis
Tyler Francis
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Jul 30
The Regex Bug That Passes Code Review, Passes Tests, and Takes Down Prod
# javascript
# security
# regex
# node
3 Â reactions
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6 min read
Four ways to split sentences (without machine learning)
Speedyk-005
Speedyk-005
Speedyk-005
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Jul 24
Four ways to split sentences (without machine learning)
# nlp
# architecture
# regex
# rulebased
1 Â reaction
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6 min read
3 Regex Patterns That Save Hours of Debugging
zhihu wu
zhihu wu
zhihu wu
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Jul 21
3 Regex Patterns That Save Hours of Debugging
# regex
# webdev
# programming
# tutorial
Add Comment
2 min read
One Bad Regex Can Freeze Node.js: Here's How to Stop It
Luciano Menezes
Luciano Menezes
Luciano Menezes
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Jul 23
One Bad Regex Can Freeze Node.js: Here's How to Stop It
# regex
# webdev
# programming
# tutorial
2 Â reactions
1 Â comment
6 min read
How to Clean Messy LLM JSON Output Without Regex Hell
M0N0S0DIUM
M0N0S0DIUM
M0N0S0DIUM
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Jul 16
How to Clean Messy LLM JSON Output Without Regex Hell
# api
# regex
# llm
# productivity
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2 min read
5 Signs Your Regex Is Wrong (and How to Spot Them in Seconds)
zhihu wu
zhihu wu
zhihu wu
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Jul 16
5 Signs Your Regex Is Wrong (and How to Spot Them in Seconds)
# regex
# javascript
# webdev
# beginners
1 Â reaction
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3 min read
A Test-Matrix Workflow for Debugging JavaScript Regular Expressions
CarlSmith
CarlSmith
CarlSmith
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Jul 13
A Test-Matrix Workflow for Debugging JavaScript Regular Expressions
# javascript
# regex
# testing
# webdev
1 Â reaction
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6 min read
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trending guides/resources
Four ways to split sentences (without machine learning)
The Regex Bug That Passes Code Review, Passes Tests, and Takes Down Prod
Debugging a 41-second regex hang with a regex tester in 2026
Why You Shouldn't Paste Private Logs Into Cloud Regex Testers 🔍
One Bad Regex Can Freeze Node.js: Here's How to Stop It
Why Your Regex Works in Testing But Breaks in Production
Parsing Trading Data With Regex: Test a Whole Suite of Cases at Once, Not One String
Regex Against a PDF: The One Endpoint That Skips OCR Entirely
I scraped 89 job postings to find out how my salary parser was lying to me
Four filters returned nothing and I read all four as nothing being there
A Test-Matrix Workflow for Debugging JavaScript Regular Expressions
25+ useful and commonly used Regular Expressions
Stop letting your AI guess: The case for deterministic Regex in MCP
Stop Guessing: A Free Regex Tester That Actually Explains Your Pattern
The Regex That Took Down Cloudflare for 27 Minutes
3 Regex Patterns That Save Hours of Debugging
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- 9 [direct]
- I scraped 89 job postings to find out how my salary parser was lying to me [direct]
- northbell [direct]
- Apify [direct]
- # webscraping [direct]
- # javascript [direct]
- # debugging [direct]
- Four filters returned nothing and I read all four as nothing being there [direct]
- Mahiro Hirakawa [direct]
- # testing [direct]
- # shell [direct]
- Stop Guessing: A Free Regex Tester That Actually Explains Your Pattern [direct]
- Sarfaraz [direct]
- # webdev [direct]
- # productivity [direct]
- Regex Against a PDF: The One Endpoint That Skips OCR Entirely [direct]
- PDF4me [direct]
- # api [direct]
- # pdf [direct]
- # automation [direct]
- The Regex That Took Down Cloudflare for 27 Minutes [direct]
- Brad Penney [direct]
- # computerscience [direct]
- # security [direct]
- # programming [direct]
- Debugging a 41-second regex hang with a regex tester in 2026 [direct]
- AI Dev Hub [direct]
- # performance [direct]
- # tools [direct]
- Stop letting your AI guess: The case for deterministic Regex in MCP [direct]
- Renato Marinho [direct]
- # ai [direct]
- Parsing Trading Data With Regex: Test a Whole Suite of Cases at Once, Not One String [direct]
- Max [direct]
- # python [direct]
- # tutorial [direct]
- The Regex Bug That Passes Code Review, Passes Tests, and Takes Down Prod [direct]
- Tyler Francis [direct]
- # node [direct]
- Four ways to split sentences (without machine learning) [direct]
- Speedyk-005 [direct]
- # nlp [direct]
- # architecture [direct]
- # rulebased [direct]
- 3 Regex Patterns That Save Hours of Debugging [direct]
- zhihu wu [direct]
- One Bad Regex Can Freeze Node.js: Here's How to Stop It [direct]
- Luciano Menezes [direct]
- How to Clean Messy LLM JSON Output Without Regex Hell [direct]
- M0N0S0DIUM [direct]
- # llm [direct]
- 5 Signs Your Regex Is Wrong (and How to Spot Them in Seconds) [direct]
- # beginners [direct]
- A Test-Matrix Workflow for Debugging JavaScript Regular Expressions [direct]
- CarlSmith [direct]
- Why You Shouldn't Paste Private Logs Into Cloud Regex Testers 🔍 [direct]
- Why Your Regex Works in Testing But Breaks in Production [direct]
- 25+ useful and commonly used Regular Expressions [direct]
- DEV Community [direct]
- DEV Challenges [direct]
- DEV++ [direct]
- Videos [direct]
- DEV Education Tracks [direct]
- DEV Help [direct]
- Advertise on DEV [direct]
- Organization Accounts [direct]
- DEV Showcase [direct]
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