Skip to content
CodeWiki
Practice
Paths
Tracks
Cheatsheets
Playground
Glossary
AI era
Search
⌘K
English
English
Chinese
Practice
Paths
Tracks
Cheatsheets
Playground
Glossary
AI era
English
English
Chinese
Practice
/
Quiz
/
JavaScript
/
WeakMap and WeakSet
Which list contains only values accepted as WeakMap keys in Node 24?
from WeakMap and WeakSet
Node 24
intermediate
1 min
Which list contains only values accepted as WeakMap keys in Node 24?
An object, a function, and Symbol("local")
An object, "user-1", and Symbol("local")
A function, Symbol.for("shared"), and an array
An array, null, and Symbol.iterator
Check
Ask AI about this kata
Report an error
next kata
What does this program print?
Predict the output
A new version is available
Reload