Match Words Pattern

Problem

Given a pattern string pattern and a string sentence, return true if sentence follows the same sequence as pattern. Each character in the pattern corresponds to a unique word in the sentence.

Examples

doesMatchPattern("xyx", "apple orange apple")
// returns true
// 'x' is 'apple' and 'y' is 'orange'.

doesMatchPattern("aba", "hello world world")
// returns false
// 'a' and 'b' don't consistently match.

doesMatchPattern("aaa", "banana banana banana")
// returns true
// 'a' always represents 'banana'.