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On 14/08/15 08:37 PM, Mike Nelson wrote:


On 14/08/15 04:08 PM, Jonathan Goble wrote:


This can be written in stock Lua without any new features by using
nested if blocks:

local flag = false
if i == 1 or i == 2 then
   if i == 1 then
     flag = true
   end
   print(flag)
else
   print"Unknown!"
end


But now you check for the condition twice.


This is easily re-written in DRY style:

local flag = i==1
if flag or i==2 then
    print(flag)
else
    print"Unknown!"
end
Still very clear and reduces the wordiness almost as much as the orif proposal. Sometimes a good style is just as good as syntactic sugar. 


You assume it's a simple flag change without side effects.
Add side effects and a more complicated change (a whole setup for example) and you'll easily see where my thing is better. 

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