Multiline shebang: Difference between revisions
Content added Content deleted
(add matlab shebang) |
|||
| Line 328: | Line 328: | ||
Note that we've left off the onfail handler within J, and just used a minimal definition to give us a non-zero exit code for the error case. Mostly, the assumption here would be that the error message would not be interesting, and that any failure should be handled by a retry. But you could replace the exit on error line here with the full definition and 9!: preparatory bit from the previous example and you could also of course change the 1!:2&2 lines (1!:2&2 is the "low-level" write to stdout mechanism for J - and, yes, those numbers are part of the definition of the language - or at least the "Foreigns" part of the language - note that ultimately all computer languages resolve to things which can be thought of as numbers or sequences of numbers, though some people will vigorously assert other things). |
Note that we've left off the onfail handler within J, and just used a minimal definition to give us a non-zero exit code for the error case. Mostly, the assumption here would be that the error message would not be interesting, and that any failure should be handled by a retry. But you could replace the exit on error line here with the full definition and 9!: preparatory bit from the previous example and you could also of course change the 1!:2&2 lines (1!:2&2 is the "low-level" write to stdout mechanism for J - and, yes, those numbers are part of the definition of the language - or at least the "Foreigns" part of the language - note that ultimately all computer languages resolve to things which can be thought of as numbers or sequences of numbers, though some people will vigorously assert other things). |
||
=={{header|MATLAB}}== |
|||
Unlike Octave, MATLAB has no built-in support for shebangs. In fact, several tricks are required to even approximate a shebang, due to the byzantine way that MATLAB structures scripts and function files. |
|||
~/bin/shmatlab%: |
|||
<lang bash>#!/bin/sh |
|||
matlab -nojvm -nodisplay -nosplash -r "varargin = regexp('${1+"$@"}', ' ', 'split'); nvarargin = length(varargin); run('$1'); exit" | tail -n +16 |
|||
</lang> |
|||
args.m: |
|||
<lang matlab>'shmatlab'% $0 ${1+"$@"} |
|||
'exit'; |
|||
for i = 1:nvarargin |
|||
disp(varargin{i}); |
|||
end</lang> |
|||
Example: |
|||
<pre> |
|||
$ ./args.m a b c |
|||
./args.m |
|||
a |
|||
b |
|||
c |
|||
</pre> |
|||
=={{header|OCaml}}== |
=={{header|OCaml}}== |
||