Tier 7 · Apprenticereplace

Snake To Kebab

Turn snake_case into kebab-case: user_first_name becomes user-first-name.

Replace mode runs input.replace(pattern, replacement) and compares the result. The pattern here is a single literal character — the whole difficulty is the g flag. Without it, replace stops after the first hit and you get user-first_name. This is the first thing to check whenever a replace "half works".

literals replace flags

Your pattern0 chars · par 3

Flags

Replacement — $1, $2 refer to your capture groups

Start typing — tests run as you go.

Test cases

user_first_name→ "user-first-name"
two underscores — both must go
created_at→ "created-at"
a_b→ "a-b"
id→ "id"
nothing to do

+ 4 hidden tests, checked when you submit. They are what stops a pattern that only fits the examples above.