# <hide>

function printsum(a)

println(summary(a), ": ", repr(a))

end

# </hide>

# Type Definitions are probably most similar to tyepdefs in c?

# a simple type with no special constructor functions might look like this

mutable struct Person

name::AbstractString

male::Bool

age::Float64

children::Int

end

p = Person("Julia", false, 4, 0)

printsum(p)

#> Person: Person("Julia", false, 4.0, 0)

people = Person[]

push!(people, Person("Steve", true, 42, 0))

push!(people, Person("Jade", false, 17, 3))

printsum(people)

#> 2-element Array{Person,1}: Person[Person("Steve", true, 42.0, 0), Person("Jade", false, 17.0, 3)]

# types may also contains arrays and dicts

# constructor functions can be defined to easily create objects

mutable struct Family

name::AbstractString

members::Array{AbstractString, 1}

extended::Bool

# constructor that takes one argument and generates a default

# for the other two values

Family(name::AbstractString) = new(name, AbstractString[], false)

# constructor that takes two arguements and infers the third

Family(name::AbstractString, members) = new(name, members, length(members) > 3)

end

fam1 = Family("blogs")

println(fam1)

#> Family("blogs", AbstractString[], false)

fam2 = Family("jones", ["anna", "bob", "charlie", "dick"])

println(fam2)

#> Family("jones", AbstractString["anna", "bob", "charlie", "dick"], true)