know the features of your language
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return a and a or b → return a or b
return a and a or b
return a or b
correction from @murtaza64
Lua. My beloved.
That's valid Python as well
It's probably valid javascript that returns "-1" or the empty string depending on if "b" is undefined or null
You don't need the and right? Can't it just be return a or b
This doesn't work if a is falsy non-null actually
it’s just return a and b or c is the closest Lua has to a ternary operator, but yes, for the above you could shorten it to return a or b (“or returns the first argument if true, otherwise second argument is returned”)
return a and b or c
or