Beefy Boxes and Bandwidth Generously Provided by pair Networks
laziness, impatience, and hubris

comment on

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

That code (and several other examples) don't work quite like the request:

$hash{red}{green}{brown} = 1

They do this instead:

$hash{red}{green}{brown} = { }

That inner-most key makes a lot of the foreach solutions kind of ugly because the last key must be treated specially -- unless there's a way to transmogrify a hash ref into a scalar ref? Here's a short reverse foreach that uses globs to solve the corner case:

my @array = qw(red green brown); use vars qw(%hash); foreach (reverse @array) { *hash = { $_ => (%hash) ? \%hash : 1 } }

The lexical version is more ugly and a lot less efficient:

my @array = qw(red green brown); my %hash; foreach (reverse @array) { %hash = ( $_ => (%hash) ? { %hash } : 1 ) }

In reply to Re: Re: setting hash keys by array by blssu
in thread setting hash keys by array by hotshot

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?

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 examining the Monastery: (6)
As of 2022-05-23 00:03 GMT
Find Nodes?
    Voting Booth?
    Do you prefer to work remotely?

    Results (81 votes). Check out past polls.