Word Count

Word Count



Given a phrase, count the occurrences of each word in that phrase.

For the purposes of this exercise you can expect that a word will always be one of:

  1. A number composed of one or more ASCII digits (ie "0" or "1234") OR
  2. A simple word composed of one or more ASCII letters (ie "a" or "they") OR
  3. A contraction of two simple words joined by a single apostrophe (ie "it's" or "they're")

When counting words you can assume the following rules:

  1. The count is case insensitive (ie "You", "you", and "YOU" are 3 uses of the same word)
  2. The count is unordered; the tests will ignore how words and counts are ordered
  3. Other than the apostrophe in a contraction all forms of punctuation are ignored
  4. The words can be separated by any form of whitespace (ie "\t", "\n", " ")

For example, for the phrase "That's the password: 'PASSWORD 123'!", cried the Special Agent.\nSo I fled. the count would be:

that's: 1
the: 2
password: 2
123: 1
cried: 1
special: 1
agent: 1
so: 1
i: 1
fled: 1


This is a classic toy problem, but we were reminded of it by seeing it in the Go Tour.
Last updated 31 August 2021
Edit via GitHub The link opens in a new window or tab
Vim script Exercism

Ready to start Word Count?

Sign up to Exercism to learn and master Vim script with 20 exercises, and real human mentoring, all for free.