"subtle change" in for loop
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- Subject: "subtle change" in for loop
- From: Eva Schmidt <es@...>
- Date: 2007年9月27日 16:41:30 +0200
Hello,
I've got a question about the so-called "subtle change in the scope of the
implicit variables of the for statement and for the repeat statement." (see
LuaManual/Imcompabilities with the previous version):
As I found out now, in Lua 5.1 it is no longer possible to increment the
implicit variable due to the fact, that it is a local one now.
Lua 5.0:
while (_step>0 and var<=_limit) or (_step<=0 and var>=_limit) do
block
var = var + _step
end
Lua 5.1:
while (step > 0 and var <= limit) or (step <= 0 and var >= limit) do
local v = var
block
var = var + step
end
Unfortunately this avoids the popular procedure to increment and therewith skip
an index in a table...
How can/should this be done in Lua 5.1 now??
Cheers,
Eva