Skip to content

Powered by Algolia

Log in Create account

DEV Community

Copied to Clipboard

Share to X Share to LinkedIn Share to Facebook Share to Mastodon

Report Abuse

bin

Posted on Sep 17, 2025

28-The in operator narrowing

check if a property exists in that object.

Top comments (0)

Subscribe

Dismiss

Code of Conduct • Report abuse

Joined

Nov 30, 2020

Trending on DEV Community

How do you check that an exam certificate is real? I tried to model it

#python #discuss #beginners #security

Building a local AI second brain with Ollama: our automatic test passed all 43 answers, but 7 were wrong

#ai #python #rag #productivity

I can finally SEE what my Claude Code agents are doing

#claudecode #ai #devtools #productivity

DEV Community — A space to discuss and keep up software development and manage your software career

Home
DEV Challenges
DEV++
Videos
DEV Education Tracks
DEV Help
Advertise on DEV
Organization Accounts
DEV Showcase
About
Contact
Free Postgres Database
DEV Shop
MLH

Code of Conduct
Privacy Policy
Terms of Use

Built on Forem — the open source software that powers DEV and other inclusive communities.

Made with love and Ruby on Rails. DEV Community © 2016 - 2026.

DEV Community

We're a place where coders share, stay up-to-date and grow their careers.

Log in Create account