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

comment on

( [id://3333]=superdoc: print w/replies, xml ) Need Help??
A common thing with flipflop is to want to exclude one or both endpoints. To do this, you need to actually check the scalar value returned by the .. operator; it will be a number beginning at 1 when the flip condition is met and increasing once each time thereafter, with an "E0" appended when the flop condition is met. (False is returned as "".)

Anyway, here are some examples. Better suggestions greatly encouraged.

$ cat data initial start interior end final $ # Include both endpoints $ perl -wlne'print if /start/../end/' data start interior end $ # Exclude starting point $ perl -wlne'print if ((/start/../end/) || 0) > 1' data interior end $ # Regex alternative for exclude starting point $ perl -wlne'print if (/start/../end/) =~ /^(?!1(?!\d))\d/' data interior end $ # Exclude ending point $ perl -wlne'print if (/start/../end/) =~ /^\d+$/' data start interior $ # Exclude both endpoints $ perl -wlne'print if (/start/../end/) =~ /^\d+(?<!^1)$/' data interior $ # or: $ perl -wlne'print if (/start/../end/) !~ /^1?$|E/' data interior

In reply to Re: Flipin good, or a total flop? by ysth
in thread Flipin good, or a total flop? by GrandFather

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 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?Last hourOther CB clients
Other Users?
Others admiring the Monastery: (7)
As of 2024-03-28 09:48 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    No recent polls found