org.cactoos.proc

Class ForEachWithIndex<X>

java.lang.Object

org.cactoos.proc.ForEachWithIndex<X>

Type Parameters:

X - The type to iterate over

All Implemented Interfaces:

Proc<Iterable<X>>

public final class ForEachWithIndex<X>
extends Object
implements Proc<Iterable<X>>

Executes a BiProc for each element of an Iterable

This class can be effectively used to iterate through a collection similar to how Stream.forEach(java.util.function.Consumer) works except this class also passes the index of the current element to the proc:

new ForEachWithIndex( new BiProcOf<>((input, index) -> System.out.printf("%d: \'%s\' ", index + 1, input)), ).execute( new IterableOf<>("Mary", "John", "William", "Napkin") ); // will print 1: 'Mary' 2: 'John' 3: 'William' 4: 'Napkin' to standard output

There is no thread-safety guarantee.

Since:

1.0

Constructor Summary

Constructors

Constructor and Description
ForEachWithIndex(BiProc<X,Integer> proc) Ctor.

Method Summary

Modifier and Type	Method and Description
void	exec(Iterable<X> input) Execute it.

Methods inherited from class java.lang.Object

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

Constructor Detail

ForEachWithIndex

public ForEachWithIndex(BiProc<X,Integer> proc)

Ctor.

Parameters:

proc - The proc to execute

Method Detail

exec

public void exec(Iterable<X> input)
          throws Exception

Description copied from interface: Proc

Execute it.

Specified by:

exec in interface Proc<Iterable<X>>

Parameters:

input - The argument

Throws:

Exception - If fails