Beefy Boxes and Bandwidth Generously Provided by pair Networks
Do you know where your variables are?
 
PerlMonks  

Re: numbers masking

by salva (Abbot)
on May 16, 2012 at 08:15 UTC ( #970773=note: print w/replies, xml ) Need Help??


in reply to numbers masking

$number =~ /^(\D*\d){6}/g and $number =~ s/\G(\D*)\d(?=(?:\D*\d){4})/$ +{1}X/g;

or another somewhat less cryptic approach:

my ($s, $m ,$e) = $number =~ /^((?:\D*\d){6})(.*)((?:\d\D*){4})$/; $m =~ tr/0-9/X/; $number = "$s$m$e"

or with a recent perl:

$number =~ s|^((?:\D*\d){6})(.*)(?=(?:\d\D*){4})|$1. ($2 =~ tr/0-9/X/r +)|e;

Replies are listed 'Best First'.
Re^2: numbers masking
by Anonymous Monk on May 16, 2012 at 09:12 UTC

    thnks salva. But can please explain the crytic approach(1st one)

      Well, IMO, the expression is not so complex, but you need to understand how regular expressions can be chained using \G and what look-ahead assertions do. Both things are explained in perlre.

Log In?
Username:
Password:

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://970773]
help
Chatterbox?
[talexb]: Good morning. Or, good localtime.

How do I use this? | Other CB clients
Other Users?
Others romping around the Monastery: (10)
As of 2017-06-26 15:08 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?
    How many monitors do you use while coding?















    Results (583 votes). Check out past polls.