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HACK – Collections<br />
contains($mappedName)) {<br />
return true;<br />
}<br />
}<br />
if ($nums2->count() == 0) return true;<br />
return false;<br />
}<br />
Specialized array objects<br />
▪ Vector, Set, Map, StableMap<br />
▪ Frozen*<br />
Mutable* (default)<br />
▪ Support ArrayAccess<br />
▪ Extensive library of methods