Sha256: 18a6a6b4139f02451d4e8aa1e5e431de3f52ea080f38508c35e8864e1fafa8e6
Contents?: true
Size: 766 Bytes
Versions: 10
Compression:
Stored size: 766 Bytes
Contents
# Boolean data is one bit of information. True or false.
# It is common to use Booleans with control statements to
# determine the flow of a program. In this example, when the
# boolean value "x" is true, vertical black lines are drawn and when
# the boolean value "x" is false, horizontal gray lines are drawn.
# In Ruby, false and nil are "falsy" ... they are the only things
# that will fail an "if" test. Absolutely everything else passes "if".
def setup
size 200, 200
background 0
stroke 0
(1..width).step(2) do |i|
x = i < (width/2) # Evaluates to true or false, depending on i
if x
stroke 255
line i, 1, i, height-1
end
if !x
stroke 126
line width/2, i, width-2, i
end
end
end
Version data entries
10 entries across 10 versions & 1 rubygems