more intro stuff for ch 7

This commit is contained in:
Dan Buch 2011-10-06 21:56:49 -04:00
parent 66fa87808c
commit de8cf13289

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@ -13,3 +13,27 @@ end
end
1.upto(3) { |x| puts x }
hello = lambda { "Hello" }
hello.call
log = lambda { |str| puts "[LOG] #{str}" }
log.call("A test log message.")
{1=>2, 2=>4}.each { |k,v| puts "Key #{k}, value #{v}" }
def times_n(n)
lambda { |x| x * n }
end
times_ten = times_n(10)
puts times_ten.call(5)
puts times_ten.call(1.25)
circumference = times_n(2*Math::PI)
puts circumference.call(10)
puts circumference.call(3)
puts [1, 2, 3].collect(&circumference)
ceiling = 50
puts [1, 10, 49, 50.1, 200].select { |x| x < ceiling }