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jnunemaker/fetch_as_assertion.rb

Created April 15, 2012 13:38
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fetch as an assertion
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fetch_as_assertion.rb
# from http://avdi.org/talks/confident-code-rubymidwest-2011/confident-code.html
opt = {}.fetch(:required_option)
# IndexError: key not found
opt = {}.fetch(:required_option) do
raise ArgumentError, "Missing option!"
end
# ArgumentError: Missing option!
@jnunemaker
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Never thought of using fetch to assert a key. I like this idea.

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