File: filter.doc

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\DOC filter

\TYPE {filter : ('a -> bool) -> 'a list -> 'a list}

\SYNOPSIS
Filters a list to the sublist of elements satisfying a predicate.

\KEYWORDS
list.

\DESCRIBE
{filter p l} applies {p} to every element of {l}, returning a list of those
that satisfy {p}, in the order they appeared in the original list.

\FAILURE
Fails if the predicate fails on any element.

\SEEALSO
mapfilter, partition, remove.

\ENDDOC