JS Practice — Built-in Objects

String.prototype.replaceAll() — empty string replacement (split-like)

📖 Usage Example

'foo bar foo'.replaceAll('foo', 'baz')  // → 'baz bar baz'
'banana'.replaceAll('a', 'o')           // → 'bonono'

Use replaceAll() to replace every occurrence of a search string or regex (with /g flag) with the replacement.

String.prototype.replaceAll() — Empty String

Replacing the empty string '' inserts the replacement between every character (like splitting).

Challenge: Implement joinCharsWithDash(str) that inserts a dash between every character.

joinCharsWithDash('abc') // → '-a-b-c-'

💡 Hints (1)

• Replacing `""` inserts the replacement at every position, including the start and end.