Parametric polymorphism: Difference between revisions

Tree(v::T) where {T} = Tree(v, nothing, nothing) # Single arg constructor

AppliesApply `f` (element-wise and in-place) to the values in tree `bt`.

PrintsAlso prints the tree inlike an s-expression form *for demonstrative purposes only*,

bt.val = f(bt.val)

print(" (" * string(bt.val)) # DemoDemonstration only

print(")") # DemoDemonstration only

btinttree = Tree(0,

Tree(1,

Tree(3),

Tree(5)),

Tree(2,

Tree(4),

Tree(6) nothing))

map!(x -> 2x^2, btinttree) # Pass an anonymous function

# (0 (2 (18) (50)) (8 (32) (72)))