Beefy Boxes and Bandwidth Generously Provided by pair Networks
Pathologically Eclectic Rubbish Lister
 
PerlMonks  

comment on

( #3333=superdoc: print w/replies, xml ) Need Help??

Broadly speaking, it sounds like you're talking about making sure your designs are logically/algorithmically correct. That's an honorable goal, but as Alan Perlis once said, "it's easier to write an incorrect program than understand a correct one."

Correctness is still something of a black art. Most of the research in actual machine-assisted verification seems to be happening in the area of Formal Methods, but nobody seems to have come up with a real killer app in that field, yet. Too many of the tools and notations out there use characters that don't exist on a normal keyboard. In that sense, they're kind of like APL.. they say you can write any program in the world as a one-liner in APL, and in six months nobody, including you, will be able to read it. ;-)

Joking aside, though, you'd probably do well to dig through the literature on correctness and add as many of the general techniques as possible to your bag of tricks. Three which I happen to like are:

  1. Always design for zero, one, or many inputs.
  2. Don't just assume an input's value will belong to a set of acceptable options, or fall within an acceptable range.
  3. Try not to let invalid input force branching. Always return a valid, usable result, even for invalid input.

In reply to Re: On Quality by mstone
in thread On Quality by Tanktalus

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post; it's "PerlMonks-approved HTML":



  • Are you posting in the right place? Check out Where do I post X? to know for sure.
  • Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
    <code> <a> <b> <big> <blockquote> <br /> <dd> <dl> <dt> <em> <font> <h1> <h2> <h3> <h4> <h5> <h6> <hr /> <i> <li> <nbsp> <ol> <p> <small> <strike> <strong> <sub> <sup> <table> <td> <th> <tr> <tt> <u> <ul>
  • Snippets of code should be wrapped in <code> tags not <pre> tags. In fact, <pre> tags should generally be avoided. If they must be used, extreme care should be taken to ensure that their contents do not have long lines (<70 chars), in order to prevent horizontal scrolling (and possible janitor intervention).
  • Want more info? How to link or or How to display code and escape characters are good places to start.
Log In?
Username:
Password:

What's my password?
Create A New User
Domain Nodelet?
Chatterbox?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others chanting in the Monastery: (3)
As of 2021-10-23 01:05 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?
    My first memorable Perl project was:







    Results (86 votes). Check out past polls.

    Notices?