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From "Henri Yandell (JIRA)" <>
Subject [jira] Commented: (LANG-238) [lang] Add equals(type[]) to NumberUtils
Date Wed, 30 Dec 2009 10:09:29 GMT


Henri Yandell commented on LANG-238:

ArraySet would be:

public class ArraySet<E> extends AbstractSet<E> {

    private E[] array;

    public ArraySet(E[] array) {
        this.array = array;
        this.iterator = new ArrayIterator();

    public int size() {
        return this.array.length;

    public Iterator<E> iterator() {
        return new ArrayIterator(this.array);


Where ArrayIterator is a class from Collections. So a) not much to it at first glance and
b) very squarely an overlap with Collections. Implementing items in ArrayUtils/Arrays that
are better handled by the collections themselves is probably quite the anti-pattern.

> [lang] Add equals(type[]) to NumberUtils
> ----------------------------------------
>                 Key: LANG-238
>                 URL:
>             Project: Commons Lang
>          Issue Type: Improvement
>          Components: lang.math.*
>    Affects Versions: Nightly Builds
>         Environment: Operating System: other
> Platform: Other
>            Reporter: Paul Benedict
>            Priority: Minor
>             Fix For: 3.0
> It would be useful to add an equals() method like the current min and max
> methods which take an array type and determine if all the values are equal.
> I have found myself in need of this often. I have to retrieve objects from
> multiple data sources in parallel to build an array of complex object. To ensure
> validity, I always compare that my sub-retrievals returned the same number of
> objects as expected.

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