Re: Web development with Lua
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- Subject: Re: Web development with Lua
- From: Philipp Janda <siffiejoe@...>
- Date: 2011年10月19日 02:33:06 +0200
On 18.10.2011 05:53, Tang Daogang wrote:
On Tue, Oct 18, 2011 at 11:04 AM, Norbert Kiesel<nkiesel@tbdnetworks.com>wrote:
;) I am sorry, Bamboo relies on lglib (https://github.com/daogangtang/lglib),
in which I override the __add method with ..
Not a good idea if your strings look like numbers:
$ cat > adds.lua
local mt = getmetatable( "" )
mt.__add = function( a, b )
return a .. b
end
print( "1" + "2" )
^D
$ lua adds.lua
3
Lua tries to convert arguments of '+' to numbers and apply numeric
addition *before* metamethods are involved.
Philipp