stringr::str_detect 忽略大小写

stringr::str_detect默认是区分大小写的，但有时想要忽略，怎么办？

str_extract_all(sents, regex(namesToExtract, ignore_case=TRUE))

或

str_detect(string, regex(pattern, ignore_case = T))
str_detect(string, fixed(pattern, ignore_case = T))

from stringr - R: How to ignore case when using str_detect? - StackOverflow