On Saturday 18 October 2008, David Manura wrote: > In, say, Python, strings are thought of as immutable tuples of chars > that can be indexed and sliced[4], so you have a notation like s[1], > s[-1], s[1:4], and s[2:]. That notation does pose a bit of a > challenge in Lua since s[i : f()] would normally be interpreted as a > method call in Lua rather than a range. Shmuel suggested s(i, j). > Syntax I think is a secondary decision whose details can be worked out > later. i think a nice feature for 5.3 could be to allow more than one parameter as index: o[x,y,...] would be interpreted as getmetatable(o).__index(o,x,y,...) in the case of tables, only the first parameter would be used; but for user-defined access functions having more could be useful. if that were possible, setting string.__index = string.sub would let you use s[i,j] (but s[i] would return a suffix instead of a single char...) -- Javier
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