RDocumentation: str_subset

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if(!require('stringr')) {
    install.packages('stringr')
    library('stringr')
}

fruit <- c("apple", "banana", "pear", "pineapple")
str_subset(fruit, "a")

str_subset(fruit, "^a")
str_subset(fruit, "a$")
str_subset(fruit, "b")
str_subset(fruit, "[aeiou]")

# Elements that don't match
str_subset(fruit, "^p", negate = TRUE)

# Missings never match
str_subset(c("a", NA, "b"), ".")