Sha256: bbca7d1523128f72a4ecffb7a2d1cb23c714a3975ca48ea61aa6601cfb9e8933
Contents?: true
Size: 1.05 KB
Versions: 141
Compression:
Stored size: 1.05 KB
Contents
import Base: ==
mutable struct Point{T<:Number}
x::T
y::T
end
==(p::Point, q::Point) = p.x == q.x && p.y == q.y
@enum Heading NORTH=1 EAST=2 SOUTH=3 WEST=4
mutable struct Robot
position::Point
heading::Heading
end
function Robot(position::Tuple{T, T}, heading::Heading) where T<:Number
Robot(Point(position...), heading)
end
heading(r::Robot) = r.heading
position(r::Robot) = r.position
function turn_right!(r::Robot)
r.heading = Heading(mod1(Int(r.heading) + 1, 4))
r
end
function turn_left!(r::Robot)
r.heading = Heading(mod1(Int(r.heading) - 1, 4))
r
end
function advance!(r::Robot)
if heading(r) == NORTH
r.position.y += 1
elseif heading(r) == SOUTH
r.position.y -= 1
elseif heading(r) == EAST
r.position.x += 1
else
r.position.x -= 1
end
r
end
function move!(r::Robot, instructions::AbstractString)
moves = Dict('A' => advance!, 'R' => turn_right!, 'L' => turn_left!)
for move in instructions
move in keys(moves) && moves[move](r)
end
r
end
Version data entries
141 entries across 141 versions & 1 rubygems