[OS X TeX] Invisible character

Alain Schremmer Schremmer.Alain at gmail.com
Thu Jun 22 17:26:01 CEST 2006

Jonathan Kew wrote:

> On 22 Jun 2006, at 3:54 pm, Alain Schremmer wrote:
>> 1) Robertson's macros do use the bullet as place-holder. But,  
>> occasionally, I use "sparse" tables in which I "leave [many place- 
>> holders] as-is" hence my quest for an invisible place-holder.
> Another option would be to redefine the bullet so that it disappears.  
> For example,
>   \catcode`\•=\active \def•{}
> will do this, by making the bullet character a macro that expands to  
> nothing.
> You'd need to place this *before* the \begin{tabular} or whatever,  
> but might want to place it *within* a surrounding environment such as  
> {centered}, so that the effect is contained and doesn't affect any  
> bullets that you may happen to use later in the document.
> (It wouldn't interfere with bullets auto-generated by LaTeX, e.g., by  
> {itemize}, only those that occur as literal characters in the input  
> text.)

Now here is the equivalent of High Tech!

As in the following?

           \catcode`\•=\active \def•{}
           \begin{tabular}{@{} ccc @{}}
               &    •
               &    •
               &    •
               &    •

(This is the eternal story: you lend a hand and the guy asks for the 
whole arm.)

Grateful regards
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