Re: vim rpn calculator

On 2013-11-26, BimbaLaszlo wrote:
> 2013. november 24., vasárnap 23:14:47 UTC+1 időpontban Bee a következőt írta:
> > From (linux or mac) vim I can use 'dc' a command line rpn calculator as:
> >
> > :!dc '-e 5 5 + 3 * p'
> >
> > It prints the result on the command line... THEN returns to vim.
> >
> > How do I return the value to vim?
> >
> > Is there an rpn calculator for vim?
> >
> > Bill
>
> You can use the NumUtils (
> http://www.vim.org/scripts/script.php?script_id=4634 ) plugin for
> this. Write this function to your .vimrc:
>
> function Solver( args, NUM, matches )
> return eval( a:matches.sub[ 1 ] )
> endfunction
>
> Copy the equation in to a buffer, for example:
>
> ( 5 + 5 ) * 3 = 0
>
> ... set the cursor on it, then type this in to the command prompt:
>
> :NumUtilsCall 'MyFunc', '', '\(.*\) = !NUM!'
>
> The result will be after the equal sign:
>
> ( 5 + 5 ) * 3 = 30
>
> It's a portable solution, because it uses the vim to calculate the
> equation and you can use the builtin functions in it.

You can do that more easily with something like the following. Just
visually-select the expression and type ',='.

vmap ,= y`>a = <C-R>=<C-R>"<CR><Esc>

However, neither this nor your solution uses RPN.

Regards,
Gary

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