Case inside While read File Post: 303008274

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Top Forums UNIX for Beginners Questions & Answers Case inside While read File Post 303008274 by bakunin on Wednesday 29th of November 2017 02:03:51 PM

11-29-2017

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Quote:

Originally Posted by drl

Apologies to jump in here with such a lengthy post.

You always have something interesting to contribute, so: you're welome!

Quote:

Originally Posted by drl

However, that 700-page tome might not be the best place for a shell scripting practices.

You noted some very good books and, yes, if we are talking shell programming they might be better places to look at compared to the Stevens. On the other hand - and this was my implicit point - I think there is something about how "good" programs are written which is absolutely independent of the programming language employed. Regardless of writing in assembler or the most high-level programming language there are some practices, some dos and don'ts which should be known by everybody before s/he even attempts "hello world". This is what Stevens talks about.

It might be easier to first read Eric Raymonds TAOUP, but - without wanting to take away from Erics achievement - at its very essence IMHO it rehashes what W. R. Stevens already laid down in his book. This is because the principles, the "rules" of our art are eternal and cast in stone.

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poll_mouse

poll_mouse(3alleg4)						  Allegro manual					       poll_mouse(3alleg4)

NAME

       poll_mouse - Polls the mouse. Allegro game programming library.

SYNOPSIS

       #include <allegro.h>

       int poll_mouse();

DESCRIPTION

       Wherever possible, Allegro will read the mouse input asynchronously (ie.  from inside an interrupt handler), but on some platforms that may
       not be possible, in which case you must call this routine at regular intervals to update the mouse state variables. To help you	test  your
       mouse  polling  code  even  if  you are programming on a platform that doesn't require it, after the first time that you call this function
       Allegro will switch into polling mode, so from that point onwards you will have to call this routine in order to get  any  mouse  input	at
       all, regardless of whether the current driver actually needs to be polled or not.

RETURN VALUE

       Returns zero on success, or a negative number on failure (ie. no mouse driver installed).

SEE ALSO

       mouse_needs_poll(3alleg4),   install_mouse(3alleg4),   mouse_x(3alleg4),   exlights(3alleg4),   exmouse(3alleg4),   exshade(3alleg4),  exs-
       pline(3alleg4), extrans(3alleg4)

Allegro 							   version 4.4.2					       poll_mouse(3alleg4)