R help - Oct 2014 - how to overwrite a Unary operator ?

Dear expeRts,
? Now i want to know how to implement an Unary operator?like? i++ in cpp's
?synax form.
??e.g.?? 2++? will let 2 be 3 ,? a<-2 ,a++?,will let a be 3
I tried this :
?'%++%'<-function(x){
?? x<<-x+1
}
but it have?problem,?the biggest one is?? it seems? the function need two params
like?? a%++%b , how to write a function needing just one param?

TKS !



--

PO SU
mail: desolator88 at 163.com 
Majored in Statistics from SJTU

On 17/10/14 17:29, PO SU wrote:
>
> Dear expeRts,
>    Now i want to know how to implement an Unary operator like  i++ in
cpp's  synax form.
>    e.g.   2++  will let 2 be 3 ,  a<-2 ,a++ ,will let a be 3
> I tried this :
>   '%++%'<-function(x){
>     x<<-x+1
> }
> but it have problem, the biggest one is it seems the function need
> twoparams like a%++%b , how to write a function needing just one param?
>
> TKS !
Just ***DON'T***.  The "++" operator is useful only for those wish
to
write code which is obscure to the point of incomprehensibility.  It 
makes C and its offspring "write only" languages.

If you are going to use R, use R and don't pollute it with such 
abominations.

cheers,

Rolf Turner


-- 
Rolf Turner
Technical Editor ANZJS

On 17 Oct 2014, at 06:29, PO SU <rhelpmaillist at 163.com> wrote:
>   e.g.   2++  will let 2 be 3
That would not even work in C ...

While I use this in C, I second Rolf on the general issue.

Benno