🦋 Nicolas DUBIEN

🎊 Just published the release note for fast-check 3.22.0: 💱 Built-in support for grapheme on string arbitrary 🗑️ Deprecation of specific string arbitraries, now handled by the generic one More details on our release note 📚 fast-check.dev/blog/2024/08/2…

✨ I’m thrilled to welcome our new Gold Sponsor: @lambdatesting! 🎉 Your support helps us keep improving fast-check for the whole community 💛

@ssalbdivad @arktypeio @MiTypeScript The random number generator backing fast-check (called pure-rand) is deterministic. Problem would be to provide it with a start seed changing from one run to another

@ndubien @arktypeio @MiTypeScript I think you'd be kind of screwed actually because you can't get non-determinism in the type system.

Gimmicks aside, can ArkType strings match the real-world DX of a traditional API like Zod? If you're a doubter, today is your chance to prove us wrong AND win an official @MiTypeScript Doom tee👇

@ssalbdivad @arktypeio @MiTypeScript Given DOOM is doable, fast-check might be doable in pure types 😅

@arktypeio @MiTypeScript @ndubien would actually be OP at this if fast-check had a type-level mode😅

😜#Paris, we're coming! Join us: ➡️ La-Conf.Typescript.Paris (Feb.28) ➡️ React.Paris (Mar.20-21 + #Workshop Day) #TypeScript #React #Conferences #community

🇬🇧 Hello TypeScripters 👋 Meet @ndubien, speaker at Paris TS la Conf’! 🚀 Nicolas leads engineering teams at @gopigment, focusing on delivering complex features while optimizing #React app performance.

🕳️ Time to uninstall X 🦋 I will probably continue to check it from time to time via their website. But stopping with their application 👋

🇬🇧 Hello TypeScripters and Happy New Year 👋 To kick off 2025, we’ve just published the Paris TS la Conf' schedule: buff.ly/3DFOO8k 🎉 🎟️ Don’t miss your chance to join 👉 buff.ly/3V8lgpT #ParisTS #TypeScript #BeJS

> This repository has been archived by the owner on Jan 1, 2025. It is now read-only. github.com/facebookexperi…

@rauchg Self promo fast-check.dev, mostly sharing for awareness as it might help many devs and companies to reduce the number of bugs they face

What’s an OSS project / contributor that deserves more recognition and support?

🎄 The final challenge is here! 🎅 Santa’s coin distribution for the elves is at risk. Can you help Emma ensure every elf gets paid fairly and efficiently using property-based testing? 🪙 It’s the last puzzle! 👉 fast-check.dev/blog/2024/12/2…

Last Chance! Speak now or forever .... 🤣🤣 react.paris

Advent of PBT · Day 23 🎄💰 Santa's payment delays pushed the elf Emma to create a coin-payment algorithm — but it might have bugs. After your impressive job, she decided to call you back. Can you test it to ensure elves get paid on time? 🔍 👉 fast-check.dev/blog/2024/12/2…

🔔 Advent of PBT 2024 · Day 22 🔔 Santa remastered a classic game with a festive twist: SantaMind! 🎄🎁 But there's a problem—his elves' feedback algorithm might have bugs! Can you find it to ensure every guess gets the right response? 🎅🐛 👉 fast-check.dev/blog/2024/12/2…

🎁🎮 Advent of PBT · Day 21 is here! Santa’s remastered Tic-Tac-Toe game adds a twist: a feature to check if you can still win! But can you be sure it’s bug-free? Use fast-check to uncover flaws and ensure every move matters! 👉 fast-check.dev/blog/2024/12/2…

🇫🇷 Hello les TypeScripters 👋 Nous avons terminé la revue des propositions pour le CFP de Paris TS la Conf' ! Les emails de réponse ont été envoyés. Merci à toutes et tous pour vos superbes propositions💙 On a hâte de vous partager le programme 😁 #ParisTS #TypeScript #BeJS

🇬🇧 Here we go TypeScripters! 🎉 Meet the amazing speakers of Paris TS Conf' 💙 @JoshuaKGoldberg @ndubien @orta @shaundai @AnfibiaCreativa @c9antoine @sumy92 @arcanis @davrous @ElisePatrikain1 @lcasdev @AndaristRake

🚨 Advent of PBT 2024 · Day 20 🚨 Santa tackled a coding puzzle to boost his morale but fears there might be a bug in his optimized solution. Can you prove him right (or wrong)? 🔍 Test his algorithm with fast-check and restore his confidence! 🎄✨ 👉 fast-check.dev/blog/2024/12/2…

@BenjDicken It would be better for fair comparisons.

@BenjDicken For languages like JavaScript (whatever the runtime) you should ideally do a pre-warmup of the executor. Before being fast it should have run the code several times. The first few inputs should be skipped for warm-up and measures should start after them.

Check out the results for Levenshtein distance. Fortran out here impressing. I'd like to turn this repository into something special, with a wide variety of problems to solve with each language. If you have ideas, head on over and make issues / PRs!

🎄 Day 19 of the Advent of PBT is here! Santa’s sleigh-packing algorithm needs to be checked! Can you find a bug in the elves’ plan and ensure Santa minimizes his trips? The fewer trips, the faster the gifts! 🛷✨ fast-check.dev/blog/2024/12/1…