How to ignore case when using str_detect?

Question

stringr package provides good string functions.

To search for a string (ignoring case)

one could use

stringr::str_detect('TOYOTA subaru',ignore.case('toyota')) 

This works but gives warning

Please use (fixed|coll|regex)(x, ignore_case = TRUE) instead of ignore.case(x)

What is the right way of rewriting it?

Answer 1

You can use regex (or fixed as suggested in @lmo's comment depending on what you need) function to make the pattern as detailed in ?modifiers or ?str_detect (see the instruction for pattern parameter):

library(stringr) str_detect('TOYOTA subaru', regex('toyota', ignore_case = T)) # [1] TRUE 

Answer 2

the search string must be inside function fixed and that function has valid parameter ignore_case

str_detect('TOYOTA subaru', fixed('toyota', ignore_case=TRUE))