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JavaScript String Search — exercises and bug fixes

5 hands-on exercises and 5 find-the-bug challenges for the JavaScript String Search 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

    Check for a word

    easy10 min

    Report whether the text contains Script.

  2. 2

    Find a position

    easy10 min

    Report where the word Basics starts.

  3. 3

    Check the ending

    easy10 min

    Report whether the file name ends with pdf.

  4. 4

    Report a missing word

    easy10 min

    Report the value indexOf gives when nothing matches.

  5. 5

    Find the last separator

    medium10 min

    Report the position of the final slash.

Find the bug(5)

  1. 1

    Fix the truthy index check

    easy8 min

    A match at position 0 is falsy, so it looks missing.

  2. 2

    Fix the case-sensitive search

    easy8 min

    The word is there but capitalised differently.

  3. 3

    Fix first used instead of last

    easy8 min

    The final slash is wanted, not the first.

  4. 4

    Fix endsWith checking the start

    easy8 min

    The extension is at the end of the name.

  5. 5

    Fix the search started too late

    easy8 min

    Starting past the match misses it entirely.

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