强大的R包：Purrr全功能脑图

Purrr包除了占据tidyverse风格核心函数式编程的map_* 功能，还提供非常强大的list操作功能，通过这张脑图，快速学习和记忆。 purrr中文资料非常有限，希望对您有帮助。

Purrr

• Apply Functions
  • map(.x, .f, ...)
  • map2(.x, .y, .f, ...)
  • pmap(.l, .f, ...)
  • invoke_map(.f, x = list(NULL), ..., env = NULL)
  • lmap(.x, .f)
  • imap(.x, .f)
• Work with Lists
  • Filter Lists
    • pluck(.x, ..., default = NULL)
    • keep(.x, .p, ...)
    • discard(.x, .p, ...)
    • compact(.x, .p=identity)
    • head_while(.x, .p...)
    • tail_while(.x, .p...)
  • Summarise Lists
    • every(.x, .p, ...)
    • some(.x, .p, ...)
    • has_element(.x, .p, ...)
    • detect(.x, .f, ..., right=FALSE, .p)
    • detect_index(.x, .f, ..., right=FALSE, .p)
    • vec_depth(x)
  • Transform Lists
    • modify(.x, .f, ...)
    • modify_at(.x, .at, .f, ...)
    • modify_if(.x, .p, .f, ...)
    • modify_depth(.x, .depth, .f, ...)
  • Reshape Lists
    • flatten(.x)
    • transpose(.l, .name=NULL)
  • Join (to) Lists
    • append(x, values, after=length(x))
    • prepend(x, values, before=1)
    • splice(...)
  • Work with Lists
    • array_tree(array, margin=NULL)
    • cross2(.x, .y, .filter=NULL)
    • set_names(x, nm=x)
• Reduce Lists
  • reduce(.x, .f, ..., .init, .dir=c("forward", "backward"))
  • accumulate(.x, .f, ..., .init)
  • accumulate2
• Modify function behavior
  • compose()
  • lift()
  • rerun()
  • negate()
  • partial()
  • safely()
  • quietly()
  • possibly()