Stringr AND condition

General
#1

Hi!!

I have this problem: I know that "|" is used as OR, but I don´t know what the term is when I want to use the AND condition in stringr. What can I do?

str_detect(c('como', 'como-rer', 'cedcomo', 'ds-como'),  '^como$|[como&-]')
TRUE TRUE TRUE TRUE

The result could be: TRUE TRUE FALSE TRUE

Thanks for your attention!!!!

#2

I modified your existing regex pattern so that it provides the outcome as expected. As you see, it still uses the OR-operator.

The 2nd example is finding words which matches on both conditions "starts with ds AND after that contains rer ".

library(stringr)
## modified regex pattern with the OR-operator
str_detect(c("como", "como-rer", "cedcomo", "ds-como", "ds+como-rer"),  "^como(?-)|(-como)")
#> [1]  TRUE  TRUE FALSE  TRUE FALSE

## different pattern which states: word starts with 'ds' and then contains `rer` somewhere
str_detect(c("como", "como-rer", "cedcomo", "ds-como", "ds+como-rer"),  "(^ds).+(rer)")
#> [1] FALSE FALSE FALSE FALSE  TRUE

Created on 2021-02-19 by the reprex package (v1.0.0)

Hope this helps you forward.

1 Like
#3

Thanks!!

This helps me a lot.