Java Iterable Count count(final Iterable iterable, final int step)

Description

count

License

Open Source License

Declaration

public static <T> Iterable<Integer> count(final Iterable<T> iterable, final int step) 

Method Source Code

//package com.java2s;
//License from project: Open Source License 

import java.util.Iterator;

public class Main {
    public static Iterable<Integer> count(final int min, final int max, final int step) {
        Iterable<Integer> generator = new Iterable<Integer>() {
            public Iterator<Integer> iterator() {
                return new Iterator<Integer>() {
                    int currentValue = min - step;

                    @Override//from w  ww .  j  a  va2 s. c o  m
                    public boolean hasNext() {
                        if (currentValue < max - 1) {
                            return true;
                        }
                        return false;
                    }

                    @Override
                    public Integer next() {
                        currentValue += step;
                        return currentValue;
                    }

                    @Override
                    public void remove() {

                    }

                };
            }
        };
        return generator;
    }

    public static <T> Iterable<Integer> count(final Iterable<T> iterable, final int step) {
        Iterable<Integer> generator = new Iterable<Integer>() {
            public Iterator<Integer> iterator() {
                return new Iterator<Integer>() {
                    Iterator<T> iter = iterable.iterator();
                    int currentValue = 0 - step;

                    @Override
                    public boolean hasNext() {
                        return iter.hasNext();
                    }

                    @Override
                    public Integer next() {
                        currentValue += step;
                        for (Integer i : countTo(step)) {
                            currentValue += i;
                            iter.next();
                        }
                        return currentValue;
                    }

                    @Override
                    public void remove() {

                    }

                };
            }
        };
        return generator;
    }

    public static Iterable<Integer> countTo(int max) {
        return count(0, max, 1);
    }
}

Related

1. count(Iterable iterable)
2. count(Iterable i)
3. count(Iterable iterable)
4. count(Iterable iterable)