Re: Has Lua reached perfection?
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- Subject: Re: Has Lua reached perfection?
- From: Sean Conner <sean@...>
- Date: 2018年1月28日 03:26:19 -0500
It was thus said that the Great KHMan once stated:
>
> How many other major languages that avoids having a switch
> construct are there? Lua puts in a utf8 library but not a switch
> construct?
Not built in, but ...
function switch(var,case)
if case[var] then
case[var]()
end
end
x = 4
switch(x, {
one = function() print "yada" end,
two = function() print "blah" end,
three = function() print "yahoo" end,
[4] = function() print "this is four" end,
})
You still have the overhead of a table lookup, but this is about as close
to a switch statement you can get in Lua without changing the language.
-spc