02-11-2011
Regular Expression Help [Java]
So i'm trying to write a regular expression to help me pull id numbers from a string, the input would look something like:
"Product Name" stock=6 sid=0x000000000034c000 pid=0xd70
What I'd like is a regular expression that I could enter that would return just the pid value (and one for the sid value too). The problem is I can't be sure the pid or sid will always be the same length, so rather than the input above I might get an entry that says:
"Different Product Name" stock=45 sid=0x000000000034c000 pid=0xa11713
So in the first one I'd like the expression to cut out 0xd70 and in the second one I'd like it to cut out 0xa11713. If it is any help I know that the pid is never more than 8 characters long after the 0x, and that the sid is never more than 16 (I'm not sure if shipping id can be shorter than 16 or not).
I'm new to using regular expressions, and I've figured out hot to match then number entry when I know the length, but I can't figure it out for a variable length.
input1: "Product Name" stock=6 sid=0x000000000034c000 pid=0xd70
input2: "Product Name" stock=6 sid=0x000000000034c000 pid=0xa11713
regex: pid=.....
output1: pid=0xd70
output2: pid=0xa11 <-- missing 713
Thanks for the help.
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textutil::trim(n) Text and string utilities, macro processing textutil::trim(n)
__________________________________________________________________________________________________________________________________________________
NAME
textutil::trim - Procedures to trim strings
SYNOPSIS
package require Tcl 8.2
package require textutil::trim ?0.7?
::textutil::trim::trim string ?regexp?
::textutil::trim::trimleft string ?regexp?
::textutil::trim::trimright string ?regexp?
::textutil::trim::trimPrefix string prefix
::textutil::trim::trimEmptyHeading string
_________________________________________________________________
DESCRIPTION
The package textutil::trim provides commands that trim strings using arbitrary regular expressions.
The complete set of procedures is described below.
::textutil::trim::trim string ?regexp?
Remove in string any leading and trailing substring according to the regular expression regexp and return the result as a new
string. This is done for all lines in the string, that is any substring between 2 newline chars, or between the beginning of the
string and a newline, or between a newline and the end of the string, or, if the string contain no newline, between the beginning
and the end of the string. The regular expression regexp defaults to "[ \t]+".
::textutil::trim::trimleft string ?regexp?
Remove in string any leading substring according to the regular expression regexp and return the result as a new string. This apply
on any line in the string, that is any substring between 2 newline chars, or between the beginning of the string and a newline, or
between a newline and the end of the string, or, if the string contain no newline, between the beginning and the end of the string.
The regular expression regexp defaults to "[ \t]+".
::textutil::trim::trimright string ?regexp?
Remove in string any trailing substring according to the regular expression regexp and return the result as a new string. This apply
on any line in the string, that is any substring between 2 newline chars, or between the beginning of the string and a newline, or
between a newline and the end of the string, or, if the string contain no newline, between the beginning and the end of the string.
The regular expression regexp defaults to "[ \t]+".
::textutil::trim::trimPrefix string prefix
Removes the prefix from the beginning of string and returns the result. The string is left unchanged if it doesn't have prefix at
its beginning.
::textutil::trim::trimEmptyHeading string
Looks for empty lines (including lines consisting of only whitespace) at the beginning of the string and removes it. The modified
string is returned as the result of the command.
BUGS, IDEAS, FEEDBACK
This document, and the package it describes, will undoubtedly contain bugs and other problems. Please report such in the category textutil
of the Tcllib SF Trackers [http://sourceforge.net/tracker/?group_id=12883]. Please also report any ideas for enhancements you may have for
either package and/or documentation.
SEE ALSO
regexp(n), split(n), string(n)
KEYWORDS
prefix, regular expression, string, trimming
CATEGORY
Text processing
textutil 0.7 textutil::trim(n)