Regex Practice 13/14

Capstone: reformatting names

Everything from this batch comes together here. Capture groups (Phase 5) pull pieces out of a match; .replace()'s replacement string can refer back to them with $1, $2, and so on - so you can rebuild the matched text in a different order, not just swap it for something fixed.

"Ada, Lovelace".replace(/(\w+), (\w+)/, "$2 $1") captures "Ada" as group 1 and "Lovelace" as group 2, then rebuilds the replacement as $2 followed by $1: "Lovelace Ada". The pattern found the shape; the replacement string reordered the pieces it captured.

Your task: write reformatName(str), converting a single "Last, First" name to "First Last", and reformatNames(list), applying that same reformat to every name in an array (reuse reformatName inside .map()).

You'll practice:

Referring to captured groups in a replacement string with $1/$2
Reusing a single-string regex function across a list with .map()

// Write reformatName(str): "Last, First" -> "First Last".
function reformatName(str) {

}

// Write reformatNames(list): apply reformatName to every name in list.
function reformatNames(list) {

}