h = {}
ar=[1,2,3]
h[ar]=true
ar<<4
p h[[1,2,3]]
p h[[1,2,3,4]]
str="abc"
h[str]=true
str<<"d"
p h["abc"]
p h["abcd"]
p h
h.rehash
p h[[1,2,3]]
p h[[1,2,3,4]]
p h["abc"]
p h["abcd"]
p h
aCA9IHt9CmFyPVsxLDIsM10KaFthcl09dHJ1ZQphcjw8NApwIGhbWzEsMiwzXV0KcCBoW1sxLDIsMyw0XV0Kc3RyPSJhYmMiCmhbc3RyXT10cnVlCnN0cjw8ImQiCnAgaFsiYWJjIl0KcCBoWyJhYmNkIl0KcCBoCmgucmVoYXNoCnAgaFtbMSwyLDNdXQpwIGhbWzEsMiwzLDRdXQpwIGhbImFiYyJdCnAgaFsiYWJjZCJdCnAgaA==
nil
nil
true
nil
{[1, 2, 3, 4]=>true, "abc"=>true}
nil
true
true
nil
{[1, 2, 3, 4]=>true, "abc"=>true}