Remove multiple slashes at the end of a string and leave one only in R

Question

For my case, it's an web strings, but here I will just give an easier example:`

df = data.frame(Strings = c("abc/d/e/f////", "abc///", "/", "a/bc/d/////"))

The result that I want to gain is make the string which is ended with multiple "/" into there is only one "/" left at the end of the strings.

Which means that for the df I gave above, I want to get a result like this:

df_result = data.frame(Strings = c("abc/d/e/f/", "abc/", "/", "a/bc/d/"))

Thanks for answering my question.

Could you remove the pictures of code and simply copy and paste into the question? — NelsonGon, Mar 16 '19 at 13:48
Hi and welcome to Stack Overflow! To help you effectively, we need all the necessary information to reproduce your problem, i.e. *working* code and example data. There are several [*ways to provide data*](https://stackoverflow.com/questions/5963269/how-to-make-a-great-r-reproducible-example/5963610#5963610), probably adding the output of `dput(head())` to your question is sufficient. Avoid providing code as an image! Consider [*How to make a great reproducible example*](https://stackoverflow.com/help/mcve) and edit your question accordingly, cheers! — jay.sf, Mar 16 '19 at 13:49
oh Sorry for my question, this is my first time to ask questions here. I apologize for my ignorance. — Denny Chen, Mar 17 '19 at 05:20

score 1 · Accepted Answer · answered Mar 16 '19 at 13:51

1

We could use:

string1<-"abc/d/e/f///"
gsub("/(?=/{1,})","",string1,perl=TRUE)
#[1] "abc/d/e/f/"

answered Mar 16 '19 at 13:51

NelsonGon

1

i also found out that gsub("\\/{2,}$", "/", df$Strings) works too. – Denny Chen Mar 17 '19 at 06:15
Well, it depends. I used 1 to match anything greater than or equal to 1. 2 would match anything greater than or equal to 2. – NelsonGon Mar 17 '19 at 06:18

1 Answers1