How to do ANDing of conditions in a regular expression? - regex

Question

I want to match and modify part of a string if following conditions are true:
I want to capture information regarding a project, like project duration, client, technologies used, etc..
So, I want to select string starting with word "project" or string may start with other words like "details of project" or "project details" or "project #1".
RegEx. should first look at word "project" and it should select the string only when few or all of the following words are found after word "project".
1) client
2) duration
3) environment
4) technologies
5) role
I want to select a string if it matches at least 2 of the above words. Words can appear in any order and if the string contains ANY two or three of these words, then the string should get selected.
I have sample text given below.
Details of Projects :
*Project #1: CVC – Customer Value Creation (Sep 2007 – till now) Time
Warner Cable is the world's leading
media and entertainment company, Time
Warner Cable (TWC) makes coaxial
quiver.
Client : Time Warner Cable,US. ETL
Tool : Informatica 7.1.4
Database : Oracle 9i.
Role : ETL Developer/Team Lead.
O/S : UNIX.
Responsibilities: Created Test Plan and Test Case Book. Peer reviewed team members > Mappings. Documented Mappings. Leading the Development Team. Sending Reports to onsite. Bug >fixing for Defects, Data and Performance related.
Details of Project #2: MYER – Sales
Analysis system (Nov 2005 – till now)
Coles Myer is one of Australia's largest retailers with more than 2,000 > stores throughout Australia,
Client : Coles Myer
Retail, Australia. ETL Tool :
Informatica 7.1.3 Database : Oracle
8i. Role : ETL Developer. O/S :
UNIX. Responsibilities: Extraction,
Transformation and Loading of the data
using Informatica. Understanding the
entire source system.
Created and Run Sessions and
Workflows. Created Sort files using
Syncsort Application.*
Does anyone know how to achieve this using regular expressions?
Any clues or regular expressions are welcome!
Many thanks!

Answer 1

(client|duration|environment|technologies|role).+(client|duration|environment|technologies|role)(?!\1)

Answer 2

I would break it down into a few simpler regex's to get these results. The first would select only the chunk of text between projects: (?=Project #).*(?<=Project #)
With the match that this produces, i would run a seperate regex to ask if it contains any of those words : client | duration | environment | technologies | role
If this match comes back with a count of more then 2 distinct matches, you know to select the original string!
Edit:
string originalText;
MatchCollection projectDescriptions = Regex.Matches(originalText, "(?=Project #).(?:(?!Project #).)*", RegexOptions.IgnoreCase | RegexOptions.Singleline);
Foreach(Match projectDescription in projectDescriptions)
{
MatchCollection keyWordMatches = Regex.Matches(projectDescription.value, "client | duration | environment | technologies | role ", RegexOptions.IgnoreCase);
if(keyWordMatches.Distinct.Count > 2)
{
//At this point, do whatever you need to with the original projectDescription match, the Match object will give you the index etc of the match inside the original string.
}
}

Answer 3

Maybe you need to break that requirements in two steps: first, take your key/value pairs from your string, than apply your filter.
string input = #"Project #...";
Regex projects = new Regex(#"(?<key>\S+).:.(?<value>.*?\.)");
foreach (Match project in projects.Matches(input))
{
Console.WriteLine ("{0} : {1}",
project.Groups["key" ].Value,
project.Groups["value"].Value);
}

Answer 4

Try
^(details of )?project.*?((client|duration|environment|technologies|role).*?){2}.*$
One note: This will also match if only one of the terms appears twice.
In C#:
foundMatch = Regex.IsMatch(subjectString, #"\A(?:(details of )?project.*?((client|duration|environment|technologies|role).*?){2}.*)\Z", RegexOptions.Singleline | RegexOptions.IgnoreCase);