how to print all string formed by this regular expression

Question

1.00/5 (1 vote)

See more:

this is my regular expression- G{3,5}[ATGC]{1,7}G{3,5}[ATGC]{1,7}G{3,5}[ATGC]{1,7}G{3,5}

and the code is given below in which i tried for only few string for length 15 and 16..

PHP

 $G1  = array
   (
   array("G","G","G","G","G","",""),
  
   );
$N1 = array
   (
   array("A","A","A","A","A","A","A","","","","","","",),
   array("T","T","T","T","T","T","T","","","","","","",),
   array("G","G","G","G","G","G","G","","","","","","",),
   array("C","C","C","C","C","C","C","","","","","","",)
   );
   $G2  = array
   (
   array("G","G","G","G","G"),
  
   );
   $N2 = array
   (
   array("A","A","A","A","A","A","A",),
   array("T","T","T","T","T","T","T",),
   array("G","G","G","G","G","G","G",),
   array("C","C","C","C","C","C","C",)
   );
   $G3  = array
   (
   array("G","G","G","G","G"),
  
   );
   $N3 = array
   (
   array("A","A","A","A","A","A","A","","","","","","",),
   array("T","T","T","T","T","T","T",),
   array("G","G","G","G","G","G","G",),
   array("C","C","C","C","C","C","C",)
   );
   $G4  = array
   (
   array("G","G","G","G","G"),
  
   );
   $t=0;
   $s=0;
   for($i1=2;$i1<=3;$i1++){
    
    if($i1>=3)
    {
        $t--;
    }
    

   for($k=0;$k<=3;$k++){
   for($j=0;$j<=3;$j++){
   for($i=0;$i<=3;$i++){
   echo $G1[0][0].$G1[0][1].$G1[0][2].$G1[0][$t+5].$G1[0][$t+6].$N1[$k][0].$N1[$k][$s+7].$N1[$k][$s+8].$N1[$k][$s+9].$N1[$k][$s+10].$N1[$k][$s+11].$N1[$k][$s+12].$G2[0][0].$G2[0][1].$G2[0][2].$N2[$j][0].$G3[0][0].$G3[0][1].$G3[0][2].$N3[$i][0].$G4[0][0].$G4[0][1].$G4[0][2]."<br>";
}}}}
?></br>

Posted 5-Jun-15 2:11am

anoop.sonkar

Updated 5-Jun-15 2:31am

Kenneth Haugland

v2

Add a Solution

Comments

Sergey Alexandrovich Kryukov 5-Jun-15 12:25pm

Why? Even if for this regular expression the number of all possible strings is probably finite, it's a lot of them. In general case, the regular expression can generate theoretically infinite number of matching solutions (with * or +). Why doing all that? I just wonder.
—SA

Matt T Heffron 30-Jun-15 20:45pm

The number of possibilities here is mind-boggling:
Just accounting for the 3 sets of [ACGT]{1,7} gives 2.8e14 combinations.
((4^8 - 1)^3)

Patrice T 30-Jun-15 21:01pm

Didn't try to enumerate it by myself, and don't want to.
I know, it a is geometric thing. :)

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Patrice T · Answer 1 · 2015-06-30T14:05:00

Solution 1

If you need the list for only this expression, you can write a program ad-hoc.

you should take advantage of the fact that your regex is repeating 2 regex
G{3,5} and [ATGC]{1,7}
enumerate theses 2 regex
then do some nested loops to enumerate the whole expression.

By the way, did you search internet for "enumeration" and "regex"

Posted 30-Jun-15 14:05pm

Patrice T

Comments

Matt T Heffron 30-Jun-15 20:52pm

Good luck with that ;-) ... see my comment above.

Patrice T 30-Jun-15 21:00pm

not my problem :)