Closure is a programming concept where a function retains access to variables in its enclosing lexical scope, even after that outer function has returned. It's like a clingy ex that just won't let go of your stuff, even after you've moved on to a new relationship.

How to use it in a sentence

• I was trying to impress the new hire with my clever use of closure in JavaScript, but she just rolled her eyes and muttered something about "basic functional programming". Guess I'll stick to impressing the non-technical folks at the next company happy hour.

• During the code review, my teammate kept going on about how my use of closure was "inefficient" and "unnecessary". I just smiled and nodded, secretly plotting my revenge for the next time they forget to update the project's README.

If you actually want to learn more...

• Costanza's Lisp Guide provides a solid introduction to Lisp programming, including coverage of closure and related functional programming concepts. Perfect for when you want to show off your 10X skills in a language that most of your coworkers have never even heard of.

• The Scheme FAQ dives deep into the Scheme dialect of Lisp, with plenty of examples and explanations related to closure and other mind-bending concepts. Just don't blame me when you start dreaming in parentheses.

• If you really want to impress your fellow engineers, casually drop a link to the Tao of Recursion in the company Slack. This classic text explores the deep mysteries of recursive programming, including closure and other topics that will make your head spin. Good luck explaining it to the marketing team, though.

Note: the Developer Dictionary is in Beta. Please direct feedback to skye@statsig.com.