Re: Weak keyed tables with primitive keys

[Mark Hamburg <mark@...>]

I understand the theoretical arguments for treating strings as values  
with respect to weak tables, but are there any practical benefits? It  
would seem, for example, to get in the way of caching the results of  
file reads a la:

	fileCache = setmetatable( { }, {
		__mode = 'kv',
		__index = function( t, k )
			local v
			local f = io.open( k )
			if f then
				v = f:read( "*a" )
				t[ k ] = v
				f:close()
			end
			return v
		end } )

Mark