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Our first user! #27

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cfhammill opened this issue Oct 15, 2018 · 0 comments

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cfhammill commented Oct 15, 2018 •

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@zsbuchwald noticed an opportunity to use lenses in of her analyses this morning! The task was renaming columns in a matrix:

df %>%
  setNames(c(names(.)[1], paste0("rel-", names(.)[-1])))

became the beautiful

df %>%
  over(names_l %.% indexes(-1), 
       ~ paste0("rel-", .))

EDIT: for completeness this can be done with dplyr as well

df %>%
  rename_at(vars(-1), funs(paste0("rel-", .))

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