Beefy Boxes and Bandwidth Generously Provided by pair Networks
Think about Loose Coupling

comment on

( #3333=superdoc: print w/replies, xml ) Need Help??
I agree with the premise: but sometimes the problem isn't actually the design: its that you're trying to abstract something too far.

Consider your example:

# if we have an expense account and the amount is too large if (4223 == $acct and $amount >= 100) {
which became
if ( excessive_expense_account($acct,$amount) ) {
If I don't understand the system, then the second form is probably no better than the first. Although the named function is explicit, I still need to look at the definition because I don't know what an excessive_expense_account is. A better name might help (e.g. "expense_account_is_over_limit(...)"): but, as a maintenance programmer, I'd prefer to see:
if ( $acct->is_expense_account && $amount > EXPENSE_LIMIT) {
This contains meaningful names, which helps me to read the code: plus it has detail, which is needed for me to truely grok it. When we abstract out the detail, even to a meaningful name, then we circumvent the human brain's chunking mechanism. We only have a meaningful name: not the detail that enables the brain to see the patterns.

The summary: don't abstract too far. If you have difficulty finding a name, then by all means use this as a flag to re-examine the design. But if the design look good, then consider leaving it alone: don't force details into function names. Polysynthetic identifier names are all very well, but grammar exists for a reason: to aid comprehension.


In reply to Re: $bad_names eq $bad_design by dpuu
in thread $bad_names eq $bad_design by Ovid

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 How to display code and escape characters are good places to start.
Log In?

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

How do I use this? | Other CB clients
Other Users?
Others meditating upon the Monastery: (5)
As of 2023-05-30 21:43 GMT
Find Nodes?
    Voting Booth?

    No recent polls found