EasyConfig

• EasyConfig provides a friendly-syntax, nested AbstractDict{Symbol, Any} data structure.
• The advantages over other AbstractDict/NamedTuples are:

1) Intermediate levels are created on the fly:

• This is quite convenient for working with JSON specs (e.g. PlotlyLight.jl).

c = Config()
c.one.two.three = 1

• Compare this to OrderedDict and NamedTuple:

c = OrderedDict(:one => OrderedDict(:two => OrderedDict(:three => 1)))

c = (one = (two = (three = 1,),),)

c = (; one = (;two = (;three = 1)))

2) Easy to Use Both Interactively and Programmatically

• You can use any combination of String/Symbol with getproperty/getindex.
• For working interactively, getproperty is the most convenient to work with.
• For working programmatically, getindex is the most convenient to work with.

# getproperty
c.one.two.three

# getindex
c[:one][:two][:three]

# mix and match
c["one"].two."three"

@config

Create a Config with a NamedTuple-like or block syntax. The following examples create equivalent Configs:

@config (x.one=1, x.two=2, z=3)

@config x.one=1 x.two=2 z=3

@config begin
    x.one = 1
    x.two = 2
    z = 3
end

let
    c = Config()
    c.x.one = 1
    c.x.two = 2
    c.z = 3
end

Note

• Accessing a non-existent property creates an Undefined.
• This is necessary for assigning deeply nested properties (an eventual setindex! after nested getindex-es).
  • config.a == Undefined(config, [:a]), config.a.b == Undefined(config, [:a, :b]), etc.
  • config.a.b.c = 1 == Undefined(config, [:a, :b])[:c] = 1