[lang] ArrayUtils.isAscending, isDescending

[Phil Steitz <ph...@steitz.com>]

In a few places in [math] we need to verify that double[] array arguments 
are sorted.  Would methods such as these make sense in ArrayUtils? 
Considering all ordered types and strict vs. = would lead to quite a few 
new methods.

For now, we can just code what we need in [math], but I thought I would 
toss this out for [lang] to consider.  Thoughts?

Phil


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