Beefy Boxes and Bandwidth Generously Provided by pair Networks
XP is just a number

comment on

( #3333=superdoc: print w/replies, xml ) Need Help??
> Other monks have suggested a binary search solution, but did not provide an example.

FWIW I did, but didn't publish, since it didn't fit into davido's benchmark (which has also it flaws by only testing 42)

DB<47> sub tst { if ($_>=9) { if ($_>=41 and $_<=56) {1} elsif ($_<= +10) {1} } elsif ($_<=6) { if ($_>=5){1} elsif \ ($_<=2 and $_>=1) {1} }} DB<48> %in = map { $_ => 1 } 1,2,5,6,9,10,41..56 DB<49> tst != $in{$_} and print "error $_" for 1..190 DB<50>

I was also pondering about how to optimize a solution (time and memory) for all cases.

Like potentially

  • many points
  • many ranges
  • floats instead of integers
  • multiple dimensions (like rectangular areas in a plane)
An "optimal" solution would involve combining different techniques ...

And some techniques which were prominent in similar older threads haven't been mentioned yet.

Anyway all of this is far beyond what the OP wanted.

But yes: again "I'm suggesting but not providing an example" ;-)

Cheers Rolf
(addicted to the Perl Programming Language :)
Wikisyntax for the Monastery

In reply to Re^2: Comparing a value to a list of numbers by LanX
in thread Comparing a value to a list of numbers by g_speran

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
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others perusing the Monastery: (3)
As of 2021-06-13 03:32 GMT
Find Nodes?
    Voting Booth?
    What does the "s" stand for in "perls"? (Whence perls)

    Results (54 votes). Check out past polls.