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29 <p class=
"p1"><span class=
"s1"><b>TwoWayIdentityDictionary
<span class=
"Apple-tab-span"> </span><span class=
"Apple-tab-span"> </span></b></span><b>associative collection mapping keys to values and back
</b></p>
30 <p class=
"p2"><br></p>
31 <p class=
"p2"><br></p>
32 <p class=
"p1"><b>Inherits from:
</b><a href=
"../Core/Object.html"><span class=
"s2"><b>Object
</b></span></a><b> :
</b><a href=
"Collection.html"><span class=
"s2"><b>Collection
</b></span></a><b><span class=
"Apple-converted-space"> </span></b></p>
33 <p class=
"p2"><br></p>
34 <p class=
"p1">Similar to
<a href=
"IdentityDictionary.html"><span class=
"s3">IdentityDictionary
</span></a>, but allows to go efficiently from element to key and back.
</p>
35 <p class=
"p1">The contents of a TwoWayIdentityDictionary are
<b>unordered
</b>.
<span class=
"Apple-converted-space"> </span>You must not depend on the order of items.
</p>
36 <p class=
"p2"><br></p>
37 <p class=
"p2"><br></p>
38 <p class=
"p1"><b>*getID(obj)
</b></p>
39 <p class=
"p3">find the key for a given object. If object is not element of the dictionary, it returns nil.
</p>
40 <p class=
"p4"><br></p>
41 <p class=
"p5">// example
</p>
42 <p class=
"p6"><br></p>
43 <p class=
"p7"><span class=
"s4">a =
</span>TwoWayIdentityDictionary
<span class=
"s4">.new;
</span></p>
44 <p class=
"p8">a.put(
<span class=
"s5">\test
</span>,
999);
</p>
45 <p class=
"p8">a.put([
<span class=
"s6">"some"</span>,
<span class=
"s6">"strings"</span>],
1200);
</p>
46 <p class=
"p8">a.at(
<span class=
"s5">\test
</span>);
</p>
47 <p class=
"p8">a.getID(
999);
</p>
48 <p class=
"p8">a.getID(
1200);
</p>
49 <p class=
"p8">a.getID(
888);
<span class=
"s7">// nil
</span></p>
