In Ruby symbol can be conveniently converted to a Proc such as:
%{john terry fiona}.map(&:capitalize) # -> %{John Terry Fiona}
Is there a way to pass a method to a Proc, to shorten the following code:
["john", "terry", "fiona"].each do |n|
assert n.valid_encoding?
end
Thanks.
%w{john terry fiona}.map(&:valid_encoding?).each(&method(:assert))
Unorthodox approach to the same thing:
Compose =
lambda do |*xs|
ph, *ps = xs.map(&:to_proc)
lambda do |*ys|
r = ph[*ys]
ps.each do |p|
r = p[r]
end
r
end
end
["john", "terry", "fiona"].each(&Compose[:valid_encoding?, method(:assert)])
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