Stdlib

std.core

Core combinators, list accessors, and a platform predicate.

(import std.core)

Predicates

Symbol	Description
`(atom? x)`	True when `x` is an atomic value (not a pair).
`(list? x)`	True when `x` is a proper list.
`(windows?)`	True when running on Windows.

Symbol	Description
`(identity x)`	Returns `x`.
`(compose f g ...)`	Right-to-left function composition.
`(flip f)`	Returns `(lambda (a b) (f b a))`.
`(constantly x)`	Returns a function that ignores its arguments and returns `x`.
`(negate p)`	Returns `(lambda args (not (apply p args)))`.
`(void)`	Returns the unspecified value.

Symbol	Description
`(cadr xs)`	Second element.
`(caddr xs)`	Third element.
`(caar xs)`	`car` of `car`.
`(cdar xs)`	`cdr` of `car`.
`(caddar xs)`	`car` of `cddar`.
`(last xs)`	Last element of a non-empty list.
`(iota n)`	List of integers `0..n-1`.
`(assoc-ref alist key)`	Value paired with `key`, or `#f` if absent.