Women in Technology

Article:		Five Habits for Successful Regular Expressions
Subject:		US phone numbers
Date:		2003-08-29 12:20:26
From:		anonymous2
Matching phone numbers can be tricky (it's a great exercise for 'fuzzy logic' via regexps in Perl). I've cut that gordian knot in the past by sidestepping the formatting issue: # remove anything nonnumeric $origphone = $phone; $phone =~ s/\D//g; # beginning of string, (optional 3 digits) followed by (mandatory 7 digits), end of string if ($phone =~ /^(\d{3})?(\d{7})$/) { ($areacode, $phonenumber) = ($1,$2); # XXX additional tests here to make sure areacode, phone don't start # with 0 or 1, or stick it into the regexp } else { warn "Number ($origphone) doesn't look like a valid US phone number\n"; } Krishna Sethuraman

Showing messages 1 through 3 of 3.

• more appropriately ...
  2003-08-29 12:31:01  anonymous2 [View]
  
  
  Not to take away from the main point of the article; it's an ugly practical problem I've dealt with in the past and I wanted to point out another option. Re-stated in the context of the article, please replace the appropriate line in my last post with:
  
  if ($phone =~ m/^ # beginning of string
  (\d{3})? # maybe an area code
  (\d{7}) # definitely 7 digits
  $ # end of string
  /x) {
  
  Krishna Sethuraman
• more appropriately ...
  2003-11-08 10:42:06  anonymous2 [View]
  
  
  how to use regular expression to search
  
  all digits of the pattern in MYSQL
  
  
  X-XX-X
  XX-XX-X
  XXX-XX-X
  XXXX-XX-X
  XXXXX-XX-X
  
  
  I tried
  
  
  mysql> select * from database where field regexp "(\d{2,5}-\d{2}-d{1});
  
  seems not working
  
  regards
  M.Karthikeyan
  pl. mail:
  
  karthik@email.unc.edu
  
• more appropriately ...
  2004-01-12 08:36:19  anonymous2 [View]
  
  
  it works with
  mysql> select count(*) from database where field1 regexp "[[:digit:]]{2,6}-[[:digit:]]{2}-[[:digit:]]{1}";