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Re: python-mode broken - zip and git issues


From: Tim Johnson
Subject: Re: python-mode broken - zip and git issues
Date: Sun, 1 Feb 2015 11:40:32 -0900
User-agent: Mutt/1.4.2.3i

* Drew Adams <address@hidden> [150201 11:35]:
> > Would there be anything wrong about a function like this:
> > (defun tj-check-mode (prefix)
> >   "Test the major mode to see if the symbol begins with prefix.
> >   The test is case insensitive."
> >   (interactive)
> >   (string-prefix-p prefix (symbol-name major-mode) 1))
> > ;; return t for major-mode 'python or 'python-mode
> 
> No, nothing wrong with that.
> 
> But:
> 
> * Function names ending in `-mode' suggest mode functions.
>   The convention for predicates is to use suffix `p' or
>   `-p'.  See (elisp) `Coding Conventions'.
> 
> * You probably want the doc string to say that it returns
>   non-nil if...  Just saying that something tests something
>   doesn't tell you how to understand the test result. ;-)
> 
> * If you just want to check for those two modes then it
>   is more correct to check membership:
>     (memq major-mode '(python python-mode))
>   That rules out returning non-nil for, say, `pythonesque'.  
  good tip on docstring
  ... and I've learned a new function (memq) as well as 
  distinguishing between eq and equal.
  thanks again 
-- 
Tim 
tim at tee jay forty nine dot com or akwebsoft dot com
http://www.akwebsoft.com, http://www.tj49.com



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