About Regular Expressions using Groups

Hello All,

I want to break the string by using the Regular Expression:

String:"((ALLRAD + !(812_ENGLAND, US))" or (((ALLRAD + !(812_ENGLAND, US)))"
or ((((ALLRAD + !(812_ENGLAND, US))))"

Output:"(ALLRAD + !(812_ENGLAND))"
"(ALLRAD + !(US))"

Thanks in Advance

This is just a generalization of the expression in your previous thread:

http://www.c-sharpcorner.com/forums/thread/252590/about-regular-expressions.aspx

The following should deal with any number of brackets at either end of the text:

using System;

using System.Text.RegularExpressions;

class Test

{

static void Main()

{

string[] strs =

{

"ALLRAD + !(812_ENGLAND, US)",

"(ALLRAD + !(812_ENGLAND, US)",

"((ALLRAD + !(812_ENGLAND, US))",

"(((ALLRAD + !(812_ENGLAND, US)))",

"((((ALLRAD + !(812_ENGLAND, US))))"

};

string regExp = @"^$*(\w+\s*\+\s*(!)?)\((\w+(,\s*\w+)*)$*$";

for(int i = 0; i < strs.Length; i++)

{

Match m = Regex.Match(strs[i], regExp);

string[] split = Regex.Split(m.Groups[3].Value, @",\s*");

string[] output = new string[split.Length];

for(int j = 0; j < split.Length; j++)

{

output[j] = String.Format("({0}({1}))", m.Groups[1], split[j]);

Console.WriteLine(output[j]);

}

Console.WriteLine();

}

Console.ReadKey();

}

}

The output is:

(ALLRAD + !(812_ENGLAND))

(ALLRAD + !(US))

(ALLRAD + !(812_ENGLAND))

(ALLRAD + !(US))

(ALLRAD + !(812_ENGLAND))

(ALLRAD + !(US))

(ALLRAD + !(812_ENGLAND))

(ALLRAD + !(US))

(ALLRAD + !(812_ENGLAND))

(ALLRAD + !(US))

1 Reply

Know the answer? Post it — somebody with the same question will find it here.

Vulpes12y ago
Accepted answer
This is just a generalization of the expression in your previous thread:

http://www.c-sharpcorner.com/forums/thread/252590/about-regular-expressions.aspx

The following should deal with any number of brackets at either end of the text:

using System;
using System.Text.RegularExpressions;

class Test
{
static void Main()
{
string[] strs =
{
"ALLRAD + !(812_ENGLAND, US)",
"(ALLRAD + !(812_ENGLAND, US)",
"((ALLRAD + !(812_ENGLAND, US))",
"(((ALLRAD + !(812_ENGLAND, US)))",
"((((ALLRAD + !(812_ENGLAND, US))))"
};

string regExp = @"^$*(\w+\s*\+\s*(!)?)\((\w+(,\s*\w+)*)$*$";
for(int i = 0; i < strs.Length; i++)
{
Match m = Regex.Match(strs[i], regExp);
string[] split = Regex.Split(m.Groups[3].Value, @",\s*");
string[] output = new string[split.Length];

for(int j = 0; j < split.Length; j++)
{
output[j] = String.Format("({0}({1}))", m.Groups[1], split[j]);
Console.WriteLine(output[j]);
}

Console.WriteLine();
}

Console.ReadKey();
}
}

The output is:

(ALLRAD + !(812_ENGLAND))
(ALLRAD + !(US))

(ALLRAD + !(812_ENGLAND))
(ALLRAD + !(US))

(ALLRAD + !(812_ENGLAND))
(ALLRAD + !(US))

(ALLRAD + !(812_ENGLAND))
(ALLRAD + !(US))

(ALLRAD + !(812_ENGLAND))
(ALLRAD + !(US))