Replace "/?" from string

Question

I am trying to replace "/?" by "?" in the following URL with R :

http://www-03.ibm.com/systems/fr/express/offerings/systemx_intel/?cmp=333AD&c

So it will become :

http://www-03.ibm.com/systems/fr/express/offerings/systemx_intel?cmp=333AD&c

I have tried different functions to replace it (str_replace_all, ...) but I have always the same issue, it cannot find the string "/?" because it is two special characters.

Answer 1

This is how to use the regex replacement function sub in this case:

x <- 'http://www-03.ibm.com/systems/fr/express/offerings/systemx_intel/?cmp=333AD&c'
sub('/\\?','?',x)