kinow commented on a change in pull request #89: Add hashCode method to
CollectionUtils
URL: https://github.com/apache/commons-collections/pull/89#discussion_r364627077
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File path: src/main/java/org/apache/commons/collections4/CollectionUtils.java
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@@ -609,6 +609,33 @@ public static boolean isEqualCollection(final
Collection<?> a, final Collection<
return isEqualCollection(collect(a, transformer), collect(b,
transformer));
}
+ /**
+ * Returns the hash code of Collection through the hash method of Equator.
+ * <p>
+ * If the input collection is null return 1.
Review comment:
I think it returns `0`? Maybe something like: "When the collection is {@code
null} it returns 0 (zero). The equator must not be {@code null}, otherwise a
{@code NullPointerException} is raised." (sorry my rusty Javadoc, I think
there's a way to format code/numbers/classes/etc).
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