Functional Programming Tools

Documentation for package ‘purrr’ version 0.3.2

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-- A --

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_function	Convert an object into a mapper function
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
as_vector	Coerce a list to a vector
attr_getter	Create an attribute getter function
auto_browse	Capture side effects.

-- C --

chuck	Pluck or chuck a single element from a vector or environment
compact	Keep or discard elements using a predicate function.
compose	Compose multiple functions
cross	Produce all combinations of list elements
cross2	Produce all combinations of list elements
cross3	Produce all combinations of list elements
cross_d	Produce all combinations of list elements
cross_df	Produce all combinations of list elements
cross_n	Produce all combinations of list elements

-- D --

detect	Find the value or position of the first match
detect_index	Find the value or position of the first match
discard	Keep or discard elements using a predicate function.
done	Done box

-- E --

every	Do every or some elements of a list satisfy a predicate?
exec	Execute a function

-- F --

flatten	Flatten a list of lists into a simple vector.
flatten_chr	Flatten a list of lists into a simple vector.
flatten_dbl	Flatten a list of lists into a simple vector.
flatten_df	Flatten a list of lists into a simple vector.
flatten_dfc	Flatten a list of lists into a simple vector.
flatten_dfr	Flatten a list of lists into a simple vector.
flatten_int	Flatten a list of lists into a simple vector.
flatten_lgl	Flatten a list of lists into a simple vector.
flatten_raw	Flatten a list of lists into a simple vector.

-- H --

has_element	Does a list contain an object?
head_while	Find head/tail that all satisfies a predicate.

-- I --

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_dfc	Apply a function to each element of a vector, and its index
imap_dfr	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
imap_raw	Apply a function to each element of a vector, and its index
imodify	Modify elements selectively
insistently	Transform a function to make it run insistently or slowly
is_rate	Create delaying rate settings
iwalk	Apply a function to each element of a vector, and its index

-- K --

keep	Keep or discard elements using a predicate function.

-- L --

lift	Lift the domain of a function
lift_dl	Lift the domain of a function
lift_dv	Lift the domain of a function
lift_ld	Lift the domain of a function
lift_lv	Lift the domain of a function
lift_vd	Lift the domain of a function
lift_vl	Lift the domain of a function
list_merge	Modify a list
list_modify	Modify 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

-- M --

map	Apply a function to each element of a vector
map2	Map over multiple inputs simultaneously.
map2_chr	Map over multiple inputs simultaneously.
map2_dbl	Map over multiple inputs simultaneously.
map2_df	Map over multiple inputs simultaneously.
map2_dfc	Map over multiple inputs simultaneously.
map2_dfr	Map over multiple inputs simultaneously.
map2_int	Map over multiple inputs simultaneously.
map2_lgl	Map over multiple inputs simultaneously.
map2_raw	Map over multiple inputs simultaneously.
map_at	Apply a function to each element of a vector
map_chr	Apply a function to each element of a vector
map_dbl	Apply a function to each element of a vector
map_depth	Apply a function to each element of a vector
map_df	Apply a function to each element of a vector
map_dfc	Apply a function to each element of a vector
map_dfr	Apply a function to each element of a vector
map_if	Apply a function to each element of a vector
map_int	Apply a function to each element of a vector
map_lgl	Apply a function to each element of a vector
map_raw	Apply a function to each element of a vector
modify	Modify elements selectively
modify.default	Modify elements selectively
modify2	Modify elements selectively
modify_at	Modify elements selectively
modify_at.default	Modify elements selectively
modify_depth	Modify elements selectively
modify_depth.default	Modify elements selectively
modify_if	Modify elements selectively
modify_if.default	Modify elements selectively
modify_in	Modify a pluck location

-- N --

negate	Negate a predicate function.
null-default	Default value for 'NULL'

-- P --

partial	Partial apply a function, filling in some arguments.
pluck	Pluck or chuck a single element from a vector or environment
pluck<-	Pluck or chuck a single element from a vector or environment
pmap	Map over multiple inputs simultaneously.
pmap_chr	Map over multiple inputs simultaneously.
pmap_dbl	Map over multiple inputs simultaneously.
pmap_df	Map over multiple inputs simultaneously.
pmap_dfc	Map over multiple inputs simultaneously.
pmap_dfr	Map over multiple inputs simultaneously.
pmap_int	Map over multiple inputs simultaneously.
pmap_lgl	Map over multiple inputs simultaneously.
pmap_raw	Map over multiple inputs simultaneously.
possibly	Capture side effects.
prepend	Prepend a vector
pwalk	Map over multiple inputs simultaneously.

-- Q --

Capture side effects.

-- R --

rate-helpers	Create delaying rate settings
rate_backoff	Create delaying rate settings
rate_delay	Create delaying rate settings
rate_reset	Wait for a given time
rate_sleep	Wait for a given time
rbernoulli	Generate random sample from a Bernoulli distribution
rdunif	Generate random sample from a discrete uniform distribution
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
rep_along	Repeat a value with matching length
rerun	Re-run expressions multiple times.

-- S --

safely	Capture side effects.
set_names	Set names in a vector
simplify	Coerce a list to a vector
simplify_all	Coerce a list to a vector
slowly	Transform a function to make it run insistently or slowly
some	Do every or some elements of a list satisfy a predicate?
splice	Splice objects and lists of objects into a list

-- T --

tail_while	Find head/tail that all satisfies a predicate.
transpose	Transpose a list.

-- U --

Modify a list

-- V --

Compute the depth of a vector

-- W --

walk	Apply a function to each element of a vector
walk2	Map over multiple inputs simultaneously.

-- Z --

zap	Zap an element

-- misc --

%\|\|%	Default value for 'NULL'