com.karmasphere.share.util
Class MapUtil

java.lang.Object
  com.karmasphere.share.util.MapUtil

public class MapUtil
extends Object

Method Summary

static <I,K,V> Map<K,Set<V>>	collate(Set<I> s, Functor<I,K> f, Functor<I,V> g) Returns map { f(\$_) => { g(\$_) } }
static <K,V> Map<K,Set<V>>	collate(Set<V> s, Functor<V,K> f) Returns map { f(\$_) => { \$_ } }
static <K,V> Map<K,V>	map(Set<V> s, Functor<V,K> f) Behaves like Perl's map { \$_ => f(\$_) }
static <K,V> Map<K,Set<V>>	scatter(Set<V> s, Functor<V,Set<K>> f)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

collate

public static <K,V> Map<K,Set<V>> collate(Set<V> s,
                                          Functor<V,K> f)

Returns map { f(\$_) => { \$_ } }

collate

public static <I,K,V> Map<K,Set<V>> collate(Set<I> s,
                                            Functor<I,K> f,
                                            Functor<I,V> g)

Returns map { f(\$_) => { g(\$_) } }

map

public static <K,V> Map<K,V> map(Set<V> s,
                                 Functor<V,K> f)

Behaves like Perl's map { \$_ => f(\$_) }

scatter

public static <K,V> Map<K,Set<V>> scatter(Set<V> s,
                                          Functor<V,Set<K>> f)