Base.:(==)(a::Archer, b::Archer)

See https://stackoverflow.com/questions/70362843/how-to-create-equality-test-case-for-custom-structures-in-julia

cone_value(r, h)

Calculate the volume of a cone with radius r and height h.

cosine(x::Number)

Calculate the cosine of an angle x given in radians

cylinder_volume(r, h)

Calculate the volume of a cylinder with radius r and height h.

fac(n)

Get factorial of n.

sine(x)

Calculate the sine of an angle x given in radians.

sphere_volume(r)

Calculate the volume of a sphere with radius r

interest(amount, rate)

Calculate interest from an amount and interest rate of rate.

rate(amount, interest)

Calculate interest rate based on an amount and interest.

genSubStr(inType, indent::Int, level::Int, inStr::String) ::String

Generate substring for recursive call from subtypeTreeStr.

location(p::Property)

Returns the location of the property as a tuple of (latitude, longitude).

subtypeTreeStr(inType = nothing, indent::Int = 4) ::String

Return all sub types with tree stucture.

This function is improved version of subtypetree for easy testing.

subtypetree(roottype, level = 1, indent = 4)

Display the entire type hierarchy starting from the specified roottype

std_by_security(valuation)

Find standard deviation of each attribute for each security

explode(things::AbstractVector{Any})

explode an array of objects

overlap(A::Rectangle, B::Rectangle)

check if two rectangles (A & B) overlap

tow(A::Spaceship, B::T) where {T <: Thing}

equivalent of parametric type

engage_wheels(args...)

engage wheels for landing. Optional

land2!(vehicle)

Landing (using trait)

move!

move the vehicle by the specified distance

position

returns the (x, y) position of the vehicle

power_off!

turn off the vehicle's engine

power_on!

turn on the vehicle's engine

travel_path(position, destination)

Returns a travel plan from current position to destination

turn!

steer vehicle to the specified direction

Create a L-system model.

Create a L-system state from a model.

Display model nicely.

Add rule to a model.

Compact the result suitable for display

format(::Formatter, x::T) where {T <: Number}

Format a number x using the specified formatter. Returns a string.

Insert new elements at current position.