Re: Lua 5.2 Length Operator and tables (bug?)
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- Subject: Re: Lua 5.2 Length Operator and tables (bug?)
- From: "Joseph Manning" <manning@...>
- Date: 2012年4月17日 18:43:11 +0100
On 2012-Apr-17 (Tue) at 11:18 (-0500), Coda Highland wrote:
>> function table.issequence(t)
>> for i = 1, #t do
>> if t[i] == nil then return false end
>> end
>> return true
>> end
Counterexample:
$ cat test.lua
function issequence(t)
for i = 1, #t do
if t[i] == nil then return false end
end
return true
end
t = { 1, 2 }
t[ 2 ] = nil
t[ 3 ] = 3
print( t[ 1 ], t[ 2 ], t[ 3 ], issequence( t ) )
$ lua -v test.lua
Lua 5.1.5 Copyright (C) 1994-2012 Lua.org, PUC-Rio
1 nil 3 true
Joseph
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Joseph Manning / Computer Science / UCC Cork Ireland / manning@cs.ucc.ie
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