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Count the intersecting words in a vector that are found in another vector (only counts unique words).
str_count_intersect(x, y)
A vector of words.
A vector of words to test against.
A number, the count of unique words in x also in y
# NOT RUN { str_count_intersect( x = c("a", "dog", "went", "to", "the", "store"), y = c("dog", "to", "store") ) # }
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