couple of simple yasnippet questions

couple of simple yasnippet questions

[andrea]

I end up to define every day new snippets and it's wonderful, but I
still have some problems when they become more complicated.

- bang
  with this I would just like to insert the right bang line depending on
  the mode.
  This thing below doesn't work...

--8<---------------cut here---------------start------------->8---
  #!$$envvar $$(cdr (assoc major-mode execlists))
--8<---------------cut here---------------end--------------->8---

- latex matrix
  I have to write sometimes latex matrices, but normally I write them
  inside org-mode.
  Would it be possible to make the *matrix* snippet only available for
  latex and org-mode?
  This is the snippet.
  
--8<---------------cut here---------------start------------->8---
# -*- mode: snippet -*-
# name: matrix
# key: matrix
# possible improvement, compute the number of lines from the argument to array
# --
\left \(
\begin{array}{${1:ccc}}
${2:v1 & v2} \\
$0
\end{array}
\right \)
--8<---------------cut here---------------end--------------->8---

  A wonderful thing that it could do is creating as many lines as I
  define in the "ccc" part, any idea on how to do it?

  Thanks

Re: couple of simple yasnippet questions

[Glauber Alex Dias Prado]

andrea <andrea.crotti.0@gmail.com> writes:

> I end up to define every day new snippets and it's wonderful, but I
> still have some problems when they become more complicated.
>
> - bang
>   with this I would just like to insert the right bang line depending on
>   the mode.
>   This thing below doesn't work...
>
>   #!$$envvar $$(cdr (assoc major-mode execlists))
no clue
>
> - latex matrix
>   I have to write sometimes latex matrices, but normally I write them
>   inside org-mode.
>   Would it be possible to make the *matrix* snippet only available for
>   latex and org-mode?
my guess is that you could make org-mode snippets on a sub-dir of
latex-mode snippets this way you would inherit all latex snippets
from org-mode.
>   This is the snippet.
>   
> # -*- mode: snippet -*-
> # name: matrix
> # key: matrix
> # possible improvement, compute the number of lines from the argument to array
> # --
> \left \(
> \begin{array}{${1:ccc}}
> ${2:v1 & v2} \\
> $0
> \end{array}
> \right \)
>
>   A wonderful thing that it could do is creating as many lines as I
>   define in the "ccc" part, any idea on how to do it?
no clue either but it would involve some elisp coding (i am not yet one
such coder), i guess its doable.
>
>   Thanks