poem1 <- "This is a line\nThis is a line\n\nAnother line\n\nAnd another one\nThis is the last one"
poem2 <- "Some poetry\n\nMore poetic stuff\nAnother very poetic line\n\nThis is the last line of the poem"
library(stringr)
str_count(poem1, "\\R+")
# => [1] 4
str_count(poem2, "\\R+")
# => [1] 3
## Line counts:
str_count(poem1, "\\R+") + 1
# => [1] 5
str_count(poem2, "\\R+") + 1
# => [1] 4
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