Destructure an object — practice exercise

What you'll be asked to do

1. 1.Destructure an objectexercise · easy · 10 min

   Pull the name and age out of a person object into their own variables.

   Passes when: #out should show Ada is 36.

2. 2.Destructure an arrayexercise · easy · 10 min · practice plan

   Pull the first two colours out of an array.

   Passes when: #out should show red green.

3. 3.Skip an elementexercise · easy · 10 min · practice plan

   Use a gap to take only the third colour.

   Passes when: #out should show blue.

4. 4.Rename while destructuringexercise · easy · 10 min · practice plan

   Pull out name but call the variable fullName.

   Passes when: #out should show Grace Hopper.

5. 5.Use a default valueexercise · medium · 10 min · practice plan

   Give size a default because the object does not have one.

   Passes when: #out should show dark medium.

6. 6.Fix the brackets used for an objectbug fix · easy · 8 min

   Objects destructure by name with braces, so position gives the wrong value.

   Passes when: #out should show Ada.

7. 7.Fix the name that does not matchbug fix · easy · 8 min · practice plan

   Object destructuring matches by property name.

   Passes when: #out should show Ada.

8. 8.Fix the default that never appliesbug fix · easy · 8 min · practice plan

   A default only fills in for undefined, and the value was set to null.

   Passes when: #out should show medium.

9. 9.Fix the missing gapbug fix · easy · 8 min · practice plan

   Without the gap the first element is taken instead of the third.

   Passes when: #out should show blue.

10. 10.Fix the parameter not destructuredbug fix · easy · 8 min · practice plan

    The function receives an object but reads it as if it were a plain value.

    Passes when: #out should show Ada from London.

Between them these tasks cover Destructuring, Renaming and Default values.

Looking for a different chapter? See every practice set, or switch to the interview theory questions.