edu.jas.util

Class ListUtil

java.lang.Object

edu.jas.util.ListUtil

public class ListUtil
extends java.lang.Object

List utilities. For example map functor on list elements.

Author:

Heinz Kredel

Constructor Summary

Constructors

Constructor and Description
ListUtil()

Method Summary

Modifier and Type	Method and Description
static <C> boolean	equals(java.lang.Iterable<C> a, java.lang.Iterable<C> b) Test two iterables for equal contents and sequence.
static <C> java.util.List<C>	fill(int n, C e) Create a list of given length and content.
static <C extends Element<C>,D extends Element<D>> java.util.List<D>	map(java.util.List<C> list, UnaryFunctor<C,D> f) Map a unary function to the list.
static <C> java.util.List<java.util.List<C>>	tupleFromList(java.util.List<java.util.List<C>> A) Tuple from lists.

Methods inherited from class java.lang.Object

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

Constructor Detail

ListUtil

public ListUtil()

Method Detail

map

public static <C extends Element<C>,D extends Element<D>> java.util.List<D> map(java.util.List<C> list,
                                                                                UnaryFunctor<C,D> f)

Map a unary function to the list.

Parameters:

f - evaluation functor.

Returns:

new list elements f(list(i)).

tupleFromList

public static <C> java.util.List<java.util.List<C>> tupleFromList(java.util.List<java.util.List<C>> A)

Tuple from lists.

Parameters:

A - list of lists.

Returns:

new list with tuples (a_1,...,an) with ai in Ai, i=0,...,length(A)-1.

fill

public static <C> java.util.List<C> fill(int n,
                                         C e)

Create a list of given length and content.

Parameters:

n - length of new list

e - object to be filled in

Returns:

list (e, ..., e) of length n

equals

public static <C> boolean equals(java.lang.Iterable<C> a,
                                 java.lang.Iterable<C> b)

Test two iterables for equal contents and sequence.

Parameters:

a - iterable

b - iterable

Returns:

true, if a equals b in sequence and content, else false.