Description
A mutable hash table is a type of hash table whose entries can be changed.
Normally the entries in a mutable hash table are not printed, to prevent infinite loops in the printing routines. To print them out, use
peek.
i1 : x = new MutableHashTable
o1 = MutableHashTable{}
o1 : MutableHashTable
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i2 : scan(0 .. 30, i -> x#i = i^2)
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i3 : x # 20
o3 = 400
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i4 : x #? 40
o4 = false
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