Function to return the words of B that are not in A.

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Suppose I have a string A = "A,B,C" and a string B = "C,D,E". I am looking for a quick system that tells me which words in B are not contained in A. In this case C = "D,E". I have already made a function that searches through indexOf but I ask if there is a faster Regex system or whatever. I would also like to know if there are any known string handling C# function libraries and even if it can be maintained between multiple people.

What I have tried:

in all sites.in all sites.in all sites.

Posted 2-Oct-21 3:06am

Member 14890678

Updated 3-Oct-21 2:30am

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BillWoodruff 2-Oct-21 9:11am

Come back, when you have tried something, with specific questions. If we do your homework you will learn nothing.

Member 14890678 2-Oct-21 9:15am

yes sir, whatever you say.

BillWoodruff 3-Oct-21 5:21am

give me fifty push-ups :) ... try to figure out why this post has four downvotes.

PIEBALDconsult 2-Oct-21 10:00am

Split A into an array.
Split B into an array and create a Hashset with it.
Use HashSet.ExceptWith to remove A from B.

Member 14890678 2-Oct-21 12:06pm

Is that the origin is the string. I already have a system that uses indexOf. If I pass the chain to Hashet I spend time and it is what I do not want.

PIEBALDconsult 2-Oct-21 13:27pm

Also, what about duplicate "words"?

BillWoodruff 3-Oct-21 5:16am

Good point !

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OriginalGriff · Accepted Answer · 2021-10-02T04:01:00

Solution 1

Break the strings into separate words in arrays or other collections, and then just use Linq methods. It's one line of code:

C#

string A = "A,B,C";
string B = "C,D,E";
var items = A.Split(',').Except(B.Split(','));
Console.WriteLine(string.Join(", ", items));

Posted 2-Oct-21 4:01am

OriginalGriff

Comments

PIEBALDconsult 2-Oct-21 10:07am

You may have that backward.

OriginalGriff 2-Oct-21 10:28am

Homework should involve some user effort (particularly if the code is going to be obviously copied :D )

Member 14890678 2-Oct-21 12:03pm

Does anyone know where there are people who run a chain treatment and linguistic library? I have many functions done by me but I would like to see what people do.

Member 14890678 3-Oct-21 8:31am

IS THE CORRECT SOLUTION:
string A = "A,B,C";
string B = "C,D,E";
var items = B.Split(',').Except(A.Split(','));

BUT:
One thing happens:However, it is necessary to be able to make the function not take into account capital letters or accents.

OriginalGriff 3-Oct-21 9:11am

And?
What have you done about that?

Member 14890678 3-Oct-21 9:17am

ask the wise.