Re: [propsal] improve to table.concat?

[Tomas Guisasola Gorham <tomas@...>]

On Tue, 11 Oct 2011, Xavier Wang wrote:

> hi list :)
>
> In Lua, to print a table is some how difficult: if you print it
> direct, a useless string of table: address will print, use
> table.concat, you can print a sequence easily:
>
> local t = {1,2,3,4,5}
> print(t) --> table: xxxxxxxx
> print(table.concat(t, ",")) --> 1,2,3,4,5
>
> but you can not use this way to print a hash table:
>
> local t = {a:1, b:2, c:3}
> print(table.concat(t, ',')) --> empty line
>
> some, maybe table.concat can accept a second sep:
> print(table.concat(t, ':', ',') --> a:1,b:2,c:3
	Take a look at fullconcat() from Dado's table.extra module:

http://www.ccpa.puc-rio.br/software/dado/luadoc/modules/table.extra.html#fullconcat

	For your example:

> fullconcat = require"table.extra".fullconcat
> t = { a = 1, b = 2, c = 3 }
> =fullconcat(t) 
a=1,b=2,c=3
> =fullconcat(t, ':', ',')
a:1,b:2,c:3

	Regards,
		Tomás