Remove a string if it is followed by another string in C#

Question

1.00/5 (1 vote)

See more:

Hi All,

I have string ,
str=Fourty Four Thousand Hundred Sixty Five Dirhams and Twenty Two Fils

I need to remove 'Hundred' from string if the word 'Hundred' is followed by Thousand or Hundred or Lakh.
How to do this.Any help will be really appreciated.

What I have tried:

if (Regex.IsMatch(str, "Hundred"))
               {
                   // check if it is followed by thousand or Hundred or Lakh
                   //remove it if it is followed by thousand or Hundred or Lakh
               }

Posted 21-Nov-17 22:13pm

Member 12926744

Updated 22-Nov-17 7:37am

Add a Solution

2 solutions

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)

OriginalGriff · Accepted Answer · 2017-11-21T22:35:00

Solution 1

If you mean "if the word 'Hundred" follows Thousand or ..." as in your example, then try this:

(?<=(Thousand|Hundred|Lakh)\s+)Hundred

To remove the word:

C#

public static Regex remove = new Regex("(?<=(Thousand|Hundred|Lakh)\\s+)Hundred", RegexOptions.Compiled);
...
string result = remove.Replace(InputText,"");

If you want to play with regexes, get a copy of Expresso[^] - it's free, and it examines and generates Regular expressions.

Posted 21-Nov-17 22:35pm

OriginalGriff

Updated 21-Nov-17 23:02pm

v2

Comments

Member 12926744 22-Nov-17 4:50am

However I am getting an error 'too many arguments' while giving this code.

OriginalGriff 22-Nov-17 5:02am

It was obvious: a superfluous close bracket.

Member 12926744 22-Nov-17 6:34am

Thank you.It worked.One more thing how to eliminate the extra white spaces before the word hundred because after removing the word there are three white spaces after Thousand.

OriginalGriff 22-Nov-17 6:59am

Oh come on! That's not exactly complex, if you are using regexes!
Just move the whitespace outside the excluded prefix group...

(?<=(Thousand|Hundred|Lakh))\s+Hundred

Pete O'Hanlon 22-Nov-17 5:32am

A minor correction, use string.Empty, not "".

OriginalGriff 22-Nov-17 6:06am

Not a correction, just a style point. They are identical, they even share the same reference:

Console.WriteLine(Object.ReferenceEquals("", string.Empty) ? "Yes" : "No");

will always give you "Yes".
Personally, I find "" a lot more readable than string.Empty

Pete O'Hanlon 22-Nov-17 6:09am

They are exactly the same (due to interning), but I prefer to use string.Empty over "" to reinforce that testing for empty strings shouldn't assume or rely on it being "".

Graeme_Grant 22-Nov-17 6:47am

I do remember that there was a technical difference in the past but not any more. This explains how: .net - What is the difference between String.Empty and "" (empty string)? - Stack Overflow[^]

Perić Željko · Accepted Answer · 2017-11-22T07:36:00

If You are too lazy to learn regex , here is another not so elegant solution :

string Check(string str)
		{
			string s = str.Replace(" ","").Replace("Hundred","*");
			
			string [] s1 = s.Split('*');
			
			if(s1[1].Contains("Thousand") || 
			   s1[1].Contains("Hundred")  || 
			   s1[1].Contains("Lakh"))
			{
				str = str.Replace("Hundred","");
			}
			
			return str;
		}

After string check,
word Hundred will be removed if it is followed by words,
Thousand or Hundred or Lakh.

All the best,
Željko Perić