Solved

Need help understanding 'Split'.  C#

Posted on 2016-07-15
4
54 Views
Last Modified: 2016-07-15
I need help to make sure I am understanding the below code correctly.

FYI: textBox1 is an input box.  The user can search for anything they want.

textBox1.Text.Split(';')[0]

Open in new window


Is the 'Split' looking for ';' as a separator that the user inputted to search for multiple items in the textBox1?  If so, then does the [0] mean only the first item listed is being searched for?

Here is more of the code:

for (int i = 0; i < textBox1.Text.Split(';')[0].Length; i++)
                    {
                        if (textBox1.Text.Split(';')[0][i] == '.')
                        {
                            cnt++;
                        }
                    }

Open in new window


Can someone let me know if I am reading this code correctly?
0
Comment
Question by:huerita37
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
4 Comments
 
LVL 70

Accepted Solution

by:
Éric Moreau earned 500 total points
ID: 41713232
the [0] is the indexer. You probably mean:

for (int i = 0; i < textBox1.Text.Split(';').Length; i++)
                    {
                        if (textBox1.Text.Split(';')[i] == '.')
                        {
                            cnt++;
                        }
                    }

Open in new window

0
 

Author Comment

by:huerita37
ID: 41713239
I didn't write the code and when I was trying to read it I was getting confused.
0
 

Author Closing Comment

by:huerita37
ID: 41713251
The [0] is an indexer.  Not sure why but the original programmer allowed the user to input a search for multiple items but never searched for anything after the first ';'.
0
 
LVL 13

Expert Comment

by:Dustin Saunders
ID: 41713265
If you're ever curious, take your code and write outputs to see what it does.  Like this:

string test = "Hey; what is the problem?  Did you know; One period.  Two periods.  Not three!";
            int cnt = 0;
            Console.WriteLine(test.Split(';').Length.ToString());
            for (int i = 0; i < test.Split(';').Length; i++)
            {
                
                if (test.Split(';')[0][i] == '.')
                {
                    cnt++;
                }
                Console.WriteLine(test.Split(';')[0][i].ToString());
            }
            Console.WriteLine(test.Split(';')[0].ToString());
            Console.WriteLine(cnt.ToString());
            Console.Read();

Open in new window


You can see what exactly the code is doing.  In this case, yes they never iterate paste the first block of ';'.

You need to use a nested for(i++) in order to iterate through the first item and the second set.

Like this:

string test = "Hey; what is the problem?  Did you know; One period.  Two periods.  Not three!";
            int cnt = 0;
            Console.WriteLine(test.Split(';').Length.ToString());
            for (int i = 0; i < test.Split(';').Length; i++)
            {
                for (int j = 0; j < test.Split(';')[i].Length; j++)
                {
                    if (test.Split(';')[i][j] == '.')
                    {
                        cnt++;
                    }
                    Console.WriteLine(test.Split(';')[i][j].ToString());
                }
                
            }
            
            Console.WriteLine(cnt.ToString() + " periods found.");
            Console.Read();

Open in new window

1

Featured Post

Technology Partners: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Exception Handling is in the core of any application that is able to dignify its name. In this article, I'll guide you through the process of writing a DRY (Don't Repeat Yourself) Exception Handling mechanism, using Aspect Oriented Programming.
This article aims to explain the working of CircularLogArchiver. This tool was designed to solve the buildup of log file in cases where systems do not support circular logging or where circular logging is not enabled
In this video we outline the Physical Segments view of NetCrunch network monitor. By following this brief how-to video, you will be able to learn how NetCrunch visualizes your network, how granular is the information collected, as well as where to f…
Michael from AdRem Software explains how to view the most utilized and worst performing nodes in your network, by accessing the Top Charts view in NetCrunch network monitor (https://www.adremsoft.com/). Top Charts is a view in which you can set seve…
Suggested Courses

636 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question