Sha256: 49ce30f9a59ba682d9e693ee34557dee135e12a3b6574da98eccc4f1ff9d61f3
Contents?: true
Size: 965 Bytes
Versions: 9
Compression:
Stored size: 965 Bytes
Contents
# Conditions are like questions.
# They allow a program to decide to take one action if
# the answer to a question is true or to do another action
# if the answer to the question is false.
# The questions asked within a program are always logical
# or relational statements. For example, if the variable 'i' is
# "even" then draw short line, else draw a long one.
def setup
size 640, 360
background 0
stroke_weight 8
(5 ... width/2).step(5) do |i|
i.even? ? draw_short(i) : draw_long(i)
end
end
def draw_short(i)
stroke 255
line i * 2, 80, i * 2, height/2
end
def draw_long(i)
stroke 153
line i * 2, 20, i * 2, 180
end
# Ruby allows us to extend base classes, such as numbers, with
# methods of our choosing. In this case we'll add methods that tell
# you whether a given integer is divisible by 2, which here we declare
# as even or odd.
class Fixnum
def even?
self % 2 == 0
end
def odd?
!even?
end
end
Version data entries
9 entries across 9 versions & 1 rubygems