Beefy Boxes and Bandwidth Generously Provided by pair Networks
We don't bite newbies here... much
 
PerlMonks  

comment on

( #3333=superdoc: print w/replies, xml ) Need Help??
Erm, no, I wouldn't expect that. A hash isn't just an even-sized list. It uses a hashing algorithm (hence the name "hash") to divide the data up into a series of arbitrarily-ordered buckets. The resulting data structure is almost completely unlike a list. Why would functions designed to work on such a structure also work on lists?

The only way I can squint hard enough at it to make keys work on a list would be if keys operated by flattening the hash into a list and then iterating over every other list element. And I can't for the life of me come up with a good reason for making keys work that way.

If there really are that many use cases for iterating every other element of a list, they would be much better served by adding a new keyword for that functionality than by bloating keys with an unnecessary and anti-performant hash-to-list conversion, particularly since the new keyword could be generalized to iterate over every Nth element of the list instead of only giving "even elements" and "odd elements" options.


In reply to Re^2: Why does 'keys' need a named hash? by dsheroh
in thread Why does ‘keys’ need a named hash? by ankitpati

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 cooling their heels in the Monastery: (5)
As of 2022-01-18 08:42 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?
    In 2022, my preferred method to securely store passwords is:












    Results (52 votes). Check out past polls.

    Notices?