Array.fill, Array.map, etc

CS Principles Coding and Debugging Help
1

Hi,

Array.fill(), Array.map(), etc. don’t seem to work in the App Lab.

Here is some simple code that demonstrates the issue:
01 var list = [1, 2, 3, 4];
02 console.log(typeof(list));
03 console.log(Array.isArray(list));
04 list = list.fill(0);

The console shows:
“object”
true

Why does line 4 throw this error?
ERROR: Line: 4: TypeError: list.fill is not a function

Here are some links to reference pages:
JavaScript Array fill() Method
JavaScript Array map() Method

Any thoughts or hints? Am I getting the syntax wrong? Are these Array functions unavailable inside App Lab?

Thanks!

2

@brooks Please consult App Lab Docs. The Variable section has documentation for Arrays.
Array.fill() is not a supported function in App Lab. You may use appendItem(list, item) to add a new element into a list.

Please let us know if you need further assistance.

3

App Lab uses Javascript version ES5. fill is in version ES6.