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nepalez/ruby_challenges.rb

Last active August 29, 2015 14:25
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ruby challenges
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ruby_challenges.rb
# identity
id = -> v { v }
# composition
composition = -> g, f { -> v { g[f[v]] } }
# testing for id
g = -> v { v * 2 }
composition(g, id)[3] == g[3] # true
composition(id, g)[3] == g[3] # true
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