Re: Basic calculation in Vim

On Wednesday, August 21, 2013 4:17:47 AM UTC-5, tjg wrote:
> @BenFritz : tried again, failed again (got the answer c : undefined
>
> variable). Here is what I did :
>
>
>
> a) (normal mode) : "cyiw (on 30310)
>
> b) (insert mode) : <C-R>=c.0/1500
>
>
>
> I am sure the problem is on my side, but where ?
>

Now you omitted the <C-R> to get the 'c' register.

Your insert-mode should be:

<C-R>=<C-R>c.0/1500<Enter>

<C-R> insert a register
= choose the "expression register" which drops you into a special mode to enter the expression to evaluate
<C-R> insert a register in the special expression prompt mode
c insert contents of register 'c'
.0/1500 insert this text literally
<Enter> evaluate the resulting expression and put it into the buffer where you are inserting

<C-R>= is actually just a special case of <C-R> with a register. See :help @=, :help i_CTRL-R_=, :help registers.

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