Re^4: Check for another program availability

[hrcerq]

It doesn't. But even on Unix I have no guarantee that which will be installed on the system.

[Tux]

That exactly. And additionally, "which" might produce considerably different results in a (perl) script than on the command prompt, as some shells have "which" as a builtin or alias, so people *think* they have which (program) but in fact use the shell functionality.

[eyepopslikeamosquito]

Stackexchange why not use which and what to use instead argues strongly against using the which command.

BTW, I've always used the type command (never which) -- see here for why. :)