Top Words

Write topWords(text, k) that returns the k most frequent words in text.

Words are runs of letters, compared in lowercase (so "Moon" and "moon" are the same word).
Sort by count, highest first. Break ties alphabetically.
Return fewer than k words if the text does not have that many.

Aim for one pass to count, then one sort.

Examples

topWords("the sky the stars the sky", 2)

→ ["the", "sky"]

topWords("b a c b a b", 3)

→ ["b", "a", "c"]

solution.js

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Tests

0 of 5 passing

•
counts decide
topWords("the sky the stars the sky", 2)
expected ["the", "sky"]
•
three words
topWords("b a c b a b", 3)
expected ["b", "a", "c"]
•
empty text
topWords("", 2)
expected []
•
case is ignored
topWords("Moon moon MOON sun", 5)
expected ["moon", "sun"]
•
ties are alphabetical
topWords("x y z", 2)
expected ["x", "y"]

On the line

+80 XP

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