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JavaScript String split — exercises and bug fixes

5 hands-on exercises and 5 find-the-bug challenges for the JavaScript String split lesson. Every one is checked automatically in the browser — write the code, run it, and the tests tell you what still fails.

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Exercises(5)

  1. 1

    Split on a comma

    easy10 min

    Split the list and report how many parts there are.

  2. 2

    Split into words

    easy10 min

    Report the last word of the sentence.

  3. 3

    Reverse the letters

    easy10 min

    Split into characters, reverse them, and join back.

  4. 4

    Join with a separator

    easy10 min

    Join the parts with dashes.

  5. 5

    Capitalise every word

    medium10 min

    Split, capitalise each word, then join back.

Find the bug(5)

  1. 1

    Fix the missing separator

    easy8 min

    Splitting with no separator gives one whole piece.

  2. 2

    Fix the wrong separator

    easy8 min

    The sentence is split on words, not commas.

  3. 3

    Fix the join that adds commas

    easy8 min

    The letters should be glued together with nothing between.

  4. 4

    Fix the array never joined

    easy8 min

    The result is still an array of words.

  5. 5

    Fix reverse used on the string

    easy8 min

    Only an array can be reversed, so split first.

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