Keep the result — practice exercise

What you'll be asked to do

1. 1.Keep the resultexercise · easy · 10 min

   Assign the uppercase version back to the variable.

   Passes when: #out should show HELLO.

2. 2.Show the original survivesexercise · easy · 10 min · practice plan

   Call a method without assigning and report the variable.

   Passes when: #out should show hello.

3. 3.Change one characterexercise · easy · 10 min · practice plan

   Rebuild the string with a capital first letter.

   Passes when: #out should show Hello.

4. 4.Chain three methodsexercise · easy · 10 min · practice plan

   Trim, lowercase and replace in one chain.

   Passes when: #out should show ada-lovelace.

5. 5.Build with an arrayexercise · medium · 10 min · practice plan

   Collect the pieces and join them once.

   Passes when: #out should show item1, item2, item3.

6. 6.Fix the result never assignedbug fix · easy · 8 min

   The method returns a new string that was thrown away.

   Passes when: #out should show assigned properly.

7. 7.Fix the character assignmentbug fix · easy · 8 min · practice plan

   Assigning to a position is silently ignored.

   Passes when: #out should show Jello.

8. 8.Fix the broken chainbug fix · easy · 8 min · practice plan

   Each method returns a new string, so the calls must be chained.

   Passes when: #out should show ada-lovelace.

9. 9.Fix the push used on a stringbug fix · easy · 8 min · practice plan

   Only an array can be pushed to, and join avoids a trailing separator.

   Passes when: #out should show clean list.

10. 10.Fix the const reassignment attemptbug fix · easy · 8 min · practice plan

    A const cannot be reassigned, so use a new variable.

    Passes when: #out should show HELLO.

Between them these tasks cover Immutability, Reassignment and Chaining.

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