Penlight Function Index

I(pl.func) instantiate a PE unless it has already been done
List.range(pl.list) Emulate Python's range(x) function
List.split(pl.list) split a string using a delimiter
List:__call(pl.list) can iterate over a list directly
List:__concat(pl.list) concatenation operator
List:__eq(pl.list) equality operator ==
List:__tostring(pl.list) how our list should be rendered as a string
List:append(pl.list) Add an item to the end of the list
List:chop(pl.list) Remove a subrange of elements
List:clear(pl.list) empty the list
List:concat(pl.list) join a list of strings
List:contains(pl.list) does this list contain the value?
List:count(pl.list) Return the number of times value appears in the list
List:extend(pl.list) Extend the list by appending all the items in the given list
List:filter(pl.list) create a list of all elements which match a function
List:foreach(pl.list) call the function for each element of the list
List:index(pl.list) Return the index in the list of the first item whose value is given
List:insert(pl.list) Insert an item at a given position
List:join(pl.list) join the elements of a list using a delimiter
List:len(pl.list) list:len() is the same as #list
List:map(pl.list) apply a function to all elements
List:map2(pl.list) apply a function to elements of two lists
List:mapm(pl.list) apply a named meethod to all elements
List:new(pl.list) Create a new list
List:partition(pl.list) partition a list using a classifier function
List:pop(pl.list) Remove the item at the given position in the list, and return it
List:put(pl.list) Insert an item at the begining of the list
List:reduce(pl.list) 'reduce' a list using a binary function
List:remove(pl.list) Remove an element given its index
List:remove_value(pl.list) Remove the first item from the list whose value is given
List:reverse(pl.list) Reverse the elements of the list, in place
List:slice(pl.list) Emulate list slicing
List:slice_assign(pl.list) general slice assignment s[i1:i2] = seq
List:sort(pl.list) Sort the items of the list, in place
List:splice(pl.list) Insert a sublist into a list
List:transform(pl.list) apply a function to all elementss, in-place
Map:get(pl.class) get a value from the map
Map:iter(pl.class) return an iterator over all key-value pairs
Map:keys(pl.class) list of keys
Map:len(pl.class) size of map
Map:set(pl.class) put a value into the map
Map:values(pl.class) list of values
MultiMap:set(pl.classx) add a new value to a key
MultiMap:update(pl.classx) update a MultiMap using a table
OrderedMap:iter(pl.classx) iterate over key-value pairs in order
OrderedMap:keys(pl.classx) return the keys in order
OrderedMap:set(pl.classx) set the key's value
OrderedMap:sort(pl.classx) sort the keys
OrderedMap:update(pl.classx) update an OrderedMap using a table
OrderedMap:values(pl.classx) return the values in order
Set.map(pl.class) map a function over the values of a set
Set.values(pl.class) get a list of the values in a set
Set:difference(pl.class) new set with elements in the set that are not in the other (also -)
Set:intersection(pl.class) intersection of two sets (also *)
Set:isdisjoint(pl.class) are the sets disjoint? (no elements in common)
Set:issempty(pl.class) is the set empty?
Set:issubset(pl.class) is the first set a subset of the second?
Set:set(pl.class) add a value to a set
Set:union(pl.class) union of two sets (also +)
Set:unset(pl.class) remove a value from a set
Template:indent_substitute(pl.text) substitute values into a template, preserving indentation
Template:safe_substitute(pl.text) substitute values into a template
Template:substitute(pl.text) substitute values into a template, throwing an error
TypedList:append(pl.classx) append a value to the list
TypedList:extend(pl.classx) extend the list using another list
TypedList:slice(pl.classx) return a slice of the list
Var(pl.func) Functional helpers like composition,binding and placeholder expressions
abspath(pl.path) return an absolute path
add(pl.operator) add two values +
alltokens(pl.input) create an iterator over all tokens
args(pl.utils) take an arbitrary set of arguments and make into a table
asserteq(pl.test) like assert, except takes two arguments that must be equal
asserteq2(pl.test) a version of asserteq that takes two pairs of values
at(pl.stringx) return the 'character' at the index
basename(pl.path) return the file part of a path
bind(pl.func) bind the arguments of a function to given values
bind1(pl.utils) bind the first argument of the function to a value
call(pl.operator) apply function to some arguments ()
center(pl.stringx) center-justify s with width w
choose(pl.utils) return either of two values, depending on a condition
class(pl.class) create a new class, derived from a given base class
clear(pl.tablex) clear out the contents of a table
clonetree(pl.dir) clone a directory tree
column(pl.array2d) extract a column from the 2D array
common_prefix(pl.path) return the largest common prefix path of two paths
compare(pl.tablex) compare two list-like tables using a predicate
comparenoorder(pl.tablex) compare two tables using a predicate, without regard for element order
compose(pl.func) create a function which chains two functions
concat(pl.operator) concatenate two values (either strings or __concat defined)
copy(pl.tablex) make a shallow copy of a table
copyfile(pl.dir) copy a file
count(pl.stringx) count all instances of subtring in string
count_map(pl.tablex) A table where the key/values are the values and value counts of the table
create_getter(pl.input) create a function which grabs the next value from a source
curry(pl.func) bind the first parameter of the function to a value
dedent(pl.text) dedent a multiline string by removing any initial indent
deepcompare(pl.tablex) compare two values
deepcopy(pl.tablex) make a deep copy of a table, recursively copying all the keys and fields
difference(pl.tablex) a new table which is the difference of two tables
dirname(pl.path) return the directory part of a path
div(pl.operator) divide first value by second /
endswith(pl.stringx) does string end with the given substring?
eq(pl.operator) returns true if arguments are equal ==
escape(pl.utils) escape any 'magic' characters in a string
exists(pl.path) does a path exist?
expandtabs(pl.stringx) replace all tabs in s with n spaces
expanduser(pl.path) Replace a starting '~' with the user's home directory
extension(pl.path) get the extension part of a path
extract_cols(pl.array2d) extract the specified columns
extract_rows(pl.array2d) extract the specified rows
fields(pl.input) parse an input source into fields
fill(pl.text) format a paragraph so that it fits into a line width
filter(pl.data) Filter input using a query
filter(pl.tablex) filter a table's values using a predicate function
filter(pl.dir) return a list of all files in a list of files which match the pattern
find(pl.tablex) return the index of a value in a list
find_if(pl.tablex) return the index of a value in a list using a comparison function
fnmatch(pl.dir) does the filename match the shell pattern?
forall(pl.array2d) perform an operation for all values in a 2D array
foreach(pl.tablex) apply a function to all elements of a table
foreachi(pl.tablex) apply a function to all elements of a list-like table in order
fprintf(pl.utils) write an arbitrary number of arguments to a file using a format
function_arg(pl.utils) process a function argument
ge(pl.operator) returns true if a is greater or equal to b >=
getatime(pl.path) Return the time of last access as the number of seconds since the epoch
getctime(pl.path) Return the system's ctime
getdirectories(pl.dir) return a list of all subdirectories of the directory
getfiles(pl.dir) return a list of all files in a directory which match the a shell pattern
getmtime(pl.path) Return the time of last modification
getsize(pl.path) return size of a file
gt(pl.operator) returns true if a is greater than b >
icopy(pl.tablex) copy an array into another one, resizing the destination if necessary
imap(pl.tablex) apply a function to all values of a list
imap2(pl.tablex) apply a function to values from two arrays
import(pl.func) wrap a table of functions
import(pl.utils) take a table and 'inject' it into the local namespace
indent(pl.text) indent a multiline string
index(pl.operator) get the indexed value from a table []
index_by(pl.tablex) return a list of all values in a table indexed by another list
index_map(pl.tablex) create an index map from a list-like table
insertvalues(pl.tablex) insert values into a table
instantiate(pl.func) instantiate a PE into an actual function
is_callable(pl.utils) is the object either a function or a callable object?
is_type(pl.utils) is the object of the specified type?
isabs(pl.path) is this an absolute path?
isalnum(pl.stringx) does s only contain alphanumeric characters?
isalpha(pl.stringx) does s only contain alphabetic characters?
isdigit(pl.stringx) does s only contain digits?
isdir(pl.path) is this a directory?
isfile(pl.path) is this a file?
islower(pl.stringx) does s only contain lower case characters?
isspace(pl.stringx) does s only contain spaces?
isupper(pl.stringx) does s only contain upper case characters?
iter(pl.list) Create an iterator over a seqence
iter(pl.array2d) iterate over all elements in a 2D array, with optional indices
iter(pl.permute) an iterator over all permutations of the elements of a list
join(pl.path) return the path resulting from combining the two paths
join(pl.stringx) concatenate the strings using this string as a delimiter
keys(pl.tablex) return all the keys of a table in arbitrary order
land(pl.operator) true if both values evaluate as true (i
le(pl.operator) returns true if a is less or equal to b <=
len(pl.operator) returns length of string or table #
lfind(pl.stringx) find index of first instance of sub in s from the left
lines(pl.stringx) return an interator over all lines in a string
lines(pl.config) like io
ljust(pl.stringx) left-justify s with width w
lnot(pl.operator) false if value evaluates as true (i
lor(pl.operator) true if either value evaluate as true (i
lstrip(pl.stringx) trim any whitespace on the left of s
lt(pl.operator) returns true if a is less than b <
makepath(pl.dir) create a directory path
makeset(pl.tablex) create a set from a list-like table
map(pl.tablex) apply a function to all values of a table
map(pl.array2d) map a function over a 2D array
map2(pl.tablex) apply a function to values from two tables
map2(pl.array2d) map a function over two arrays
mapn(pl.tablex) Apply a function to a number of tables
memoize(pl.utils) 'memoize' a function (cache returned value for next call)
merge(pl.tablex) combine two tables, either as union or intersection
mod(pl.operator) modulo; remainder of a divided by b %
move(pl.tablex) copy an array into another one
movefile(pl.dir) move a file
mul(pl.operator) multiply two values *
neq(pl.operator) returns true if arguments are not equal ~=
new(pl.tablex) create a new array of specified size with initial value
new(pl.data) create a new dataset from a table of rows
nop(pl.operator) the null operation
normcase(pl.path) Normalize the case of a pathname
numbers(pl.input) generate a sequence of numbers from a source
package_path(pl.path) return the full path where a particular Lua module would be found
pairmap(pl.tablex) call the function with the key and value pairs from a table
partition(pl.stringx) partition the string using first occurance of a delimiter
pow(pl.operator) raise first to the power of second ^
printf(pl.utils) print an arbitrary number of arguments using a format
product(pl.array2d) cartesian product of two 1d arrays
query(pl.data) create a query iterator from a select string
quit(pl.utils) end this program gracefully
range(pl.array2d) get a slice of a 2D array using spreadsheet range notation
read(pl.data) read a delimited file in a Lua table
read(pl.config) read a configuration file into a table
readfile(pl.utils) return the contents of a file as a string
readlines(pl.utils) return the contents of a file as a list of lines
reduce(pl.tablex) 'reduce' a table using a binary function
reduce2(pl.array2d) reduce a 2D array into a scalar, using two operations
reduce_cols(pl.array2d) reduce the columns using a function
reduce_rows(pl.array2d) reduce the rows using a function
register(pl.func) register a function for use in placeholder expressions
remove_col(pl.array2d) remove a column from an array
remove_row(pl.array2d) remove a row from an array
removevalues(pl.tablex) remove a range of values from a table
replace(pl.stringx) replace up to n instances of old by new in the string s
repr(pl.func) create a string representation of a placeholder expression
rfind(pl.stringx) find index of first instance of sub in s from the right
rjust(pl.stringx) right-justify s with width w
rmtree(pl.dir) remove a whole directory tree
rpartition(pl.stringx) partition the string p using last occurance of a delimiter
rstrip(pl.stringx) trim any whitespace on the right of s
set(pl.array2d) set a specified range of an array to a value
set(pl.tablex) set an array range to a value
size(pl.tablex) total number of elements in this table
slice(pl.array2d) get a slice of a 2D array
split(pl.utils) - split a string into a list of strings separated by a delimiter
split(pl.stringx) split a string into a list of strings using a pattern
splitext(pl.path) given a path, return the root part and the extension part
splitl(pl.utils) split a string into a list of strings separated by either spaces or commas
splitpath(pl.path) given a path, return the directory part and a file part
splitv(pl.stringx) split a string using a pattern
splitv(pl.utils) split a string into a number of values
startswith(pl.stringx) does string start with the substring?
strip(pl.stringx) trim any whitespace on both left and right of s
sub(pl.operator) subtract b from a -
swap_cols(pl.array2d) swap two columns of an array
swap_rows(pl.array2d) swap two rows of an array
table(pl.permute) construct a table containing all the permutations of a list
table(pl.operator) make a table from the arguments
tail(pl.func) all elements of a table except the first
timer(pl.test) Time a function
tmpname(pl.path) Return a suitable full path to a new temporary file name
transform(pl.tablex) apply a function to all values of a list, in-place
unm(pl.operator) return the negative of a value -
update(pl.tablex) copy a table into another, in-place
values(pl.tablex) return all the values of the table in arbitrary order
words(pl.input) generate a sequence of words from a source
wrap(pl.text) format a paragraph into lines so that they fit into a line width
write(pl.array2d) write a 2D array to a file
writefile(pl.utils) write a string to a file
zip(pl.tablex) return a table where each element is a table of the ith values of an arbitrary