Objects in JavaScript: interview exercises
Objects in JavaScript: 7 test-checked interview exercises (Pick keys, Invert keys and values), each beside a worked example, with tests as you go. Free.
- Pick keys
- Invert keys and values
- Get by dotted path
- Merge with defaults
- Totals by status
- Flatten a tree with depth
- Group anagrams
Each exercise pairs a worked example with a twin problem to solve in a real editor; the tests run the moment you do. Progress is saved in your browser, and in your account if you sign in.