46 lines
1.2 KiB
Julia
46 lines
1.2 KiB
Julia
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# Dicts (dictionaries/maps) are not as simple as in python, resembling
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# more the way modern c++ does it
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# Dicts are usually created from an array of "Pair" types (First => Last)
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# The type of the dict keys and values are automatically infered.
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d = Dict([
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"foo" => 3,
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"bar" => 7
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])
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display(d)
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# A dict can also be initialized as an array of two tuples. This works
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# identically to the example above
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d = Dict([
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("foo", 2.71),
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("bar", 3.14)
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])
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display(d)
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# Values can be pushed to the dict similarly to an array.
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# Keep in mind that creating an empty dict like this gives the type
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# Dict{Any, Any} which might be somewhat slower because of having
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# to work for general types
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d = Dict()
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push!(d, "foo" => 1//2)
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push!(d, "bar" => 22//7)
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display(d)
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# The problem above can be mitigated by infering the types manually
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d = Dict{String, Rational{Int}}()
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push!(d, "foo" => 1//2)
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push!(d, "bar" => 22//7)
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display(d)
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# A key can be deleted from a dict with delete!()
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delete!(d, "foo")
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display(d)
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# To check if a certain key exists in the dict, the haskey function is used
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println(haskey(d, "foo")) # false
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println(haskey(d, "bar")) # true
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# Indexing a dict is done with brackets like for any array
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println(d["bar"])
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