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/ProjectEuler.1.rb

Created October 8, 2014 22:28
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ProjectEuler.1.rb
leadingMultiple = 0
multiples = {}
# first do multiples of 3:
while leadingMultiple < 1000 do
multiples[leadingMultiple] = :present;
leadingMultiple += 3
end
# reset to zero
leadingMultiple = 0
# and now do multiples of 5:
while leadingMultiple < 1000 do
multiples[leadingMultiple] = :present;
leadingMultiple += 5
end
puts multiples.keys.inject(:+)
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