Re: Lua 5.2 Length Operator and tables (bug?)

["Joseph Manning" <manning@...>]

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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