bramus/ria-course-materials — comment on commit fc3cb58c5279e4d9a794a519ffe8e6ddbf9c6324
File: 01.advanced.js.html line 400
By bramus:

Typo indeed + turns out Number does not exist in Java (but Integer does)
fixed in 52dbccaee95330c6de72e1ec1770aef8f7b74ff7