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:
- A number composed of one or more ASCII digits (ie "0" or "1234") OR
- A simple word composed of one or more ASCII letters (ie "a" or "they") OR
- 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:
- The count is case insensitive (ie "You", "you", and "YOU" are 3 uses of the same word)
- The count is unordered; the tests will ignore how words and counts are ordered
- Other than the apostrophe in a contraction all forms of punctuation are regarded as spaces
- 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:
This is a classic toy problem, but we were reminded of it by seeing it in the Go Tour.