What is the return value when accessing a Map object's element with a non-existing key?
- undefined
- nan
- KeyError
- FALSE
When accessing a non-existing key in a Map, the result is undefined. This behavior is different from objects, where accessing a non-existing property returns undefined.
Loading...
Related Quiz
- In functional programming, _________ is a technique used to avoid side effects by ensuring data is not modified.
- To check if a Map contains a certain key, use the _________ method.
- The concept of ________ is essential in understanding how functions are combined in functional composition.
- How does a pure function handle dependencies or external variables?
- In a for...of loop, using let allows each iteration to have its own _________ scope.