[Issue 1323] Implement opIn_r for arrays

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=1323


bearophile_hugs at eml.cc changed:

           What    |Removed                     |Added
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                 CC|                            |bearophile_hugs at eml.cc


--- Comment #13 from bearophile_hugs at eml.cc 2010-08-12 16:32:15 PDT ---
Associative arrays are a set (where each item has associated one value), where
item order doesn't matter.
While arrays are an ordered sequence, each item has one or less predecessor and
one or less successor.
In both cases I often want to know if an item is present in this set or this
ordered sequence.
Walter is wrong on this.

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