Package: purrr 1.2.1.9000

Hadley Wickham

purrr: Functional Programming Tools

A complete and consistent functional programming toolkit for R.

Authors:Hadley Wickham [aut, cre], Lionel Henry [aut], Posit Software, PBC [cph, fnd]

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NEWS

# Install 'purrr' in R:

install.packages('purrr', repos = c('https://tidyverse.r-universe.dev', 'https://cloud.r-project.org'))

Bug tracker:https://github.com/tidyverse/purrr/issues

Pkgdown/docs site:https://purrr.tidyverse.org

On CRAN:

functional-programming

22.01 score 1.4k stars 7.7k packages 81k scripts 1.4M downloads 184 exports 6 dependencies

Last updated from:90e74842bc. Checks:13 OK. Indexed: yes.

Target	Result	Time
linux-devel-arm64	OK	138
linux-devel-x86_64	OK	149
source / vignettes	OK	201
linux-release-arm64	OK	133
linux-release-x86_64	OK	142
macos-devel-arm64	OK	113
macos-devel-x86_64	OK	307
macos-release-arm64	OK	144
macos-release-x86_64	OK	211
windows-devel	OK	106
windows-release	OK	113
windows-oldrel	OK	120
wasm-release	OK	113

Exports:%>%%||%accumulate accumulate2 array_branch array_tree as_mapper as_vector assign_in attr_getter auto_browse chuck compact compose cross cross_df cross2 cross3 detect detect_index discard discard_at done every exec flatten flatten_chr flatten_dbl flatten_df flatten_dfc flatten_dfr flatten_int flatten_lgl flatten_raw has_element head_while imap imap_chr imap_dbl imap_dfc imap_dfr imap_int imap_lgl imap_raw imap_vec imodify in_parallel insistently invoke invoke_map invoke_map_chr invoke_map_dbl invoke_map_df invoke_map_dfc invoke_map_dfr invoke_map_int invoke_map_lgl invoke_map_raw is_atomic is_bare_atomic is_bare_character is_bare_double is_bare_integer is_bare_list is_bare_logical is_bare_numeric is_bare_vector is_character is_double is_empty is_formula is_function is_integer is_list is_logical is_null is_rate is_scalar_atomic is_scalar_character is_scalar_double is_scalar_integer is_scalar_list is_scalar_logical is_scalar_vector is_vector iwalk keep keep_at lift lift_dl lift_dv lift_ld lift_lv lift_vd lift_vl list_along list_assign list_c list_cbind list_flatten list_merge list_modify list_rbind list_simplify list_transpose lmap lmap_at lmap_if map map_at map_chr map_dbl map_depth map_df map_dfc map_dfr map_if map_int map_lgl map_raw map_vec map2 map2_chr map2_dbl map2_df map2_dfc map2_dfr map2_int map2_lgl map2_raw map2_vec modify modify_at modify_depth modify_if modify_in modify_tree modify2 negate none partial pluck pluck_depth pluck_exists pluck<-pmap pmap_chr pmap_dbl pmap_df pmap_dfc pmap_dfr pmap_int pmap_lgl pmap_raw pmap_vec possibly prepend pwalk quietly rate_backoff rate_delay rate_reset rate_sleep rbernoulli rdunif reduce reduce2 rep_along rerun safely set_names simplify simplify_all slowly some splice tail_while transpose update_list vec_depth walk walk2 when zap

Dependencies:cli glue lifecycle magrittr rlang vctrs

Functional programming in other languages

Rendered fromother-langs.Rmdusingknitr::rmarkdownon Feb 08 2026.

Last update: 2025-09-24
Started: 2017-03-21

Get started with purrr

Rendered frompurrr.Rmdusingknitr::rmarkdownon Feb 08 2026.

Last update: 2025-10-06
Started: 2025-09-28

purrr <-> base R

Rendered frombase.Rmdusingknitr::rmarkdownon Feb 08 2026.

Last update: 2025-09-24
Started: 2022-08-26

Citation

Development and contributors

Readme and manuals

Help Manual

Help page	Topics
Accumulate intermediate results of a vector reduction	accumulate accumulate2
Coerce array to list	array-coercion array_branch array_tree
Convert an object into a mapper function	as_mapper as_mapper.character as_mapper.list as_mapper.numeric
Create an attribute getter function	attr_getter
Wrap a function so it will automatically 'browse()' on error	auto_browse
Get an element deep within a nested data structure, failing if it doesn't exist	chuck
Compose multiple functions together to create a new function	compose
Find the value or position of the first match	detect detect_index
Do every, some, or none of the elements of a list satisfy a predicate?	every none some
Does a list contain an object?	has_element
Find head/tail that all satisfies a predicate.	head_while tail_while
Apply a function to each element of a vector, and its index	imap imap_chr imap_dbl imap_int imap_lgl imap_vec iwalk
Parallelization in purrr	in_parallel parallelization
Transform a function to wait then retry after an error	insistently
Keep/discard elements based on their values	compact discard keep
Keep/discard elements based on their name/position	discard_at keep_at
Modify a list	list_assign list_merge list_modify
Combine list elements into a single data structure	list_c list_cbind list_rbind
Flatten a list	list_flatten
Simplify a list to an atomic or S3 vector	list_simplify
Transpose a list	list_transpose
Apply a function to list-elements of a list	lmap lmap_at lmap_if
Apply a function to each element of a vector	map map_chr map_dbl map_int map_lgl map_vec walk
Map/modify elements at given depth	map_depth modify_depth
Apply a function to each element of a vector conditionally	map_at map_if
Map over two inputs	map2 map2_chr map2_dbl map2_int map2_lgl map2_vec walk2
Modify elements selectively	imodify modify modify2 modify_at modify_if
Modify a pluck location	assign_in modify_in
Recursively modify a list	modify_tree
Negate a predicate function so it selects what it previously rejected	negate
Partially apply a function, filling in some arguments	partial
Safely get or set an element deep within a nested data structure	pluck pluck<- pluck_exists
Compute the depth of a vector	pluck_depth vec_depth
Map over multiple input simultaneously (in "parallel")	pmap pmap_chr pmap_dbl pmap_int pmap_lgl pmap_vec pwalk
Wrap a function to return a value instead of an error	possibly
Progress bars in purrr	progress_bars
Wrap a function to capture side-effects	quietly
Create delaying rate settings	is_rate rate-helpers rate_backoff rate_delay
Reduce a list to a single value by iteratively applying a binary function	reduce reduce2
Wrap a function to capture errors	safely
Wrap a function to wait between executions	slowly