Re: [ANN] Lua 5.2.0 (alpha) now available
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- Subject: Re: [ANN] Lua 5.2.0 (alpha) now available
- From: Richard Hundt <richardhundt@...>
- Date: 2010年12月11日 14:23:18 +0100
On 12/11/2010 10:49 AM, steve donovan wrote:
table.insert(t, 1)
table.insert(t, nil)
table.insert(t, 3)
why not just?
t[1] = 1
t[3] = 3
Sorry for my terse response earlier.
My point is that, although there is a way of creating a sparse table
which works in a numeric for loop which (i.e. the # operator respects
the number of elements the table was constructed with barring trailing
nil's), there is no way of creating such a table procedurally. So it
seems of limited value having the only way of creating such a table
being with a table literal.
Of course, with the __len metamethod working for tables now, it's not
hard to make it work, so it's a minor point, but perhaps not entirely
moot. There is, after all, a way of distinguishing between being passed
"nil" (a constant) and "none" (no value) from C.
Cheers,
Richard