dplyr 0.7 equivalent for deprecated mutate_

Question

I cannot find in dplyr 0.7 a way to replace the mutate_ function which is going to be deprecated.

The mutate_ function is useful in my

Answer 1

Here's one alternative

a <- "test2"
b <- "test3"
dplyr::tibble(test = "test@test") %>% 
dplyr::mutate(a := !!rlang::parse_expr("substr(test, 1, 5)"),
  b := !!rlang::parse_expr("substr(test, 5, 5)"))
# # A tibble: 1 x 3
#        test     a     b
#         
# 1 test@test test@     @

We use the := operator to dynamically name parameters with strings, and we parse the expression string for the transformation and unwrap it with !!