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Can LUA meta tables assist in detection of nilling object?

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3

I was wondering if you can detect the nilling of an object through meta tables ?

foo = 
foo_mt = 
 __newindex = function (t, k, v)
 print (k, v)
 rawset (t, k, v)
 end
 

setmetatable (foo, foo_mt) 

foo ['oof'] = 3

outputs: oof 3

foo ['oof'] = nil

__newindex will not be called, so is there another meltable method ?

lua lua-table metatable

share|improve this question

asked Mar 23 at 5:26

AardvarkAardvark

415415

• 
  
  
  

  
  4
  

  
  
  
  
  
  

  
  
  You need to create a proxy object
  
  – Egor Skriptunoff
  Mar 23 at 7:22
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Thanks, I had gone there but had messed the syntax. Good reference.
  
  – Aardvark
  Mar 23 at 8:23
  

  
  
  
  

add a comment | 

3

I was wondering if you can detect the nilling of an object through meta tables ?

foo = 
foo_mt = 
 __newindex = function (t, k, v)
 print (k, v)
 rawset (t, k, v)
 end
 

setmetatable (foo, foo_mt) 

foo ['oof'] = 3

outputs: oof 3

foo ['oof'] = nil

__newindex will not be called, so is there another meltable method ?

lua lua-table metatable

share|improve this question

asked Mar 23 at 5:26

AardvarkAardvark

415415

• 
  
  
  

  
  4
  

  
  
  
  
  
  

  
  
  You need to create a proxy object
  
  – Egor Skriptunoff
  Mar 23 at 7:22
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Thanks, I had gone there but had messed the syntax. Good reference.
  
  – Aardvark
  Mar 23 at 8:23
  

  
  
  
  

add a comment | 

I was wondering if you can detect the nilling of an object through meta tables ?

foo = 
foo_mt = 
 __newindex = function (t, k, v)
 print (k, v)
 rawset (t, k, v)
 end
 

setmetatable (foo, foo_mt) 

foo ['oof'] = 3

outputs: oof 3

foo ['oof'] = nil

__newindex will not be called, so is there another meltable method ?

lua lua-table metatable

share|improve this question

asked Mar 23 at 5:26

AardvarkAardvark

415415

foo = 
foo_mt = 
 __newindex = function (t, k, v)
 print (k, v)
 rawset (t, k, v)
 end
 

setmetatable (foo, foo_mt) 

foo ['oof'] = 3

outputs: oof 3

foo ['oof'] = nil

__newindex will not be called, so is there another meltable method ?

share|improve this question

asked Mar 23 at 5:26

AardvarkAardvark

415415

share|improve this question

asked Mar 23 at 5:26

AardvarkAardvark

415415

asked Mar 23 at 5:26

AardvarkAardvark

415415

asked Mar 23 at 5:26

AardvarkAardvark

415415