Pointless API Docs

pointless/prelude/list.ptls (source)

Get the first element in a list

Get all elements in a list after the first

Get the last element in a non-empty list

Get a sublist of indices [start ... (end - 1)]

Lazily concatenate a list of lists into a single list

Map a list-generating function over a list and concatenate output lists

Make a new list with sep element interted between each pervious element

Make an infinite list of a value, repeated

Get the first n elements in an list, or the whole list of length < n

Get the elems after the first n elems in an list or empty if length < n

Take from a list the leading elements for which func returns true

Take elements up to (including) the first for which func returns true

Drop the leading elements for which func returns true

Drop elements up to (including) the first for which func returns true

Find the first element for which func return true, or None if none exists 

span(...) = (takewhile(...), dropWhile(...)) 

Return the list of lists of consecutive values for which func(a, b) == true

Get the reverse of list

From two lists, get a list of tuple pairs of elems from each list in order 

For lists [a0, a1, a2, ...], [b0, b1, b2, ...], return the list
[(a0, b0), (a1, b1), (a2, b2) ...], with length limited by the length
of the shorter input list

Like zip, but for an arbitrary number of input lists

Evaluate each value in a list
Useful for catching errors early

isEmpty(list) = list == Empty

Convert iter (a list, array, set, or tuple) to a list

For a list [a, b, c, ...] return [(0, a), (1, b), (2, c), ...]

Return true if list starts with the given prefix of elements

Apply a function to each list element, make a list of the results

Apply a test to each list element, make new list of passing elements

Get a single value given a list, starting value, and accumulator function

Starting with accumulator value acc, update acc <- func(acc, elem)
for each element elem in the list

example: sum(list) = reduce(0, add, list)

Reduce a non-empty list with first element set as accumulator

Reduce a list with a given function and accumulator, returning a list of
the intermediate accumulator values, including the initial value