Created
September 21, 2009 22:02
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class Calculator | |
def equation(val1, val2) | |
result = val1 + val2 | |
return result | |
end | |
end | |
# Okay so the only real point here is one of style. In Ruby it's not necessary | |
# to use 'return'. By default a method returns the value of the last expression | |
# evaluated. So your method can be rewritten | |
def equation( val1, val2 ) | |
val1 + val2 | |
end |
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require 'calculator' | |
describe Calculator do | |
it "should perform calculations" do | |
calc = Calculator.new | |
result = calc.equation(1, 5) | |
result.should == 6 | |
end | |
end | |
# Again it's a matter of style and each case is different by I would write this | |
calc.equation(1,5).should == 6 | |
# Assignment to temporary variables is sometimes helpful but, generally, I do it | |
# after the fact in order to simplify an expression group that has gotten | |
# complex, or to cache a value that is *known* to be expensive to compute. You | |
# could even take it a step further and write | |
Calculator.new.equation(1,5).should == 6 | |
# but I think that's a little bit ugly. On the other hand the creation of the | |
# calculator test asset might be better done elsewhere. Tough to say. |
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