Stdlib

std.collections

Higher-order operations on lists and vectors. Closure-compatible variants of the standard sequence procedures.

(import std.collections)

List operations

Symbol	Description
`(map* f xs)`	Map `f` over `xs`.
`(map2 f xs ys)`	Map a binary function over two lists.
`(zip-with f xs ys)`	Alias for `map2`.
`(map-indexed f xs)`	Map `(f index x)` over `xs`.
`(filter pred xs)`	Keep elements for which `pred` returns true.
`(foldl f init xs)`	Left fold.
`(foldr f init xs)`	Right fold.
`(reduce f xs)`	Left fold using the first element as seed. Errors on empty input.
`(any? pred xs)`	True when at least one element satisfies `pred`.
`(every? pred xs)`	True when all elements satisfy `pred`.
`(count pred xs)`	Number of elements satisfying `pred`.
`(sum-by f xs)`	Sum of `(f x)` over `xs`.
`(zip xs ys)`	List of pairs.
`(pairwise xs)`	List of consecutive overlapping pairs.
`(take n xs)`	First `n` elements.
`(drop n xs)`	Drop first `n` elements.
`(flatten xs)`	Flatten one level of nesting.
`(range start end [step])`	Numeric range as a list.
`(sort less? xs)`	Stable sort.