Functional Programming Tools

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Documentation for package ‘purrr’ version 1.0.2

• DESCRIPTION file.
• User guides, package vignettes and other documentation.
• Package NEWS.

Help Pages

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