Random Array Sort

Question

0.00/5 (No votes)

See more:

Hello friends

I have one class

public class PollOptions:Polls
    {
        #region [ Constructors ]
        public PollOptions()
        {
        }
        #endregion

        #region [ Properties ]

        public Guid PollOptionsGuid { get; set; }
        public int AnswerNumber { get; set; }
        public string AnswerText { get; set; }
        public int Votes { get; set; }

        #endregion

        
    }

I have one method in another class which returns Array of PollOptions class.
For example

PollOptions[] options = obj.GetPollOptions(poll.PollGuid);

options array is in sort order by AnswerNumber value. I want to arrange this array in random order.

For example. Currently it is in order like as
1 Ans1
2 Ans2
3 Ans3
And I want to make it random sort order such as

3 Ans3
1 Ans1
2 Ans2

In any order but should be random every time.

Thanks
Imrankhan

Posted 20-May-10 23:34pm

Imran Khan Pathan

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)

Imran Khan Pathan · Answer 1 · 2010-05-20T23:46:00

I found code from google.

public PollOptions[] GetRandomOptions(PollOptions[] options)
    {
        int newIndex;
        PollOptions temp;
        for (int i = 0; i < options.Length; i++)
        {
            newIndex = new Random().Next(options.Length);
            temp = options[i];
            options[i] = options[newIndex];
            options[newIndex] = temp;
        }
        return options;
    }

#realJSOP · Answer 2 · 2010-05-20T23:49:00

So you want to randomize and array. Did you consider using the Random object? (Actually, there's a better random method but it's kind of limited (only returns 0 to 255), but at least it's built into the framework. In any case, the general approach you want to take is to

0) get a random number from 0 to array.Length - 1

1) retrieve the item at that index in array A

2) Remove the item from Array A

3) Add the item to array B

4) If array A isn't empty, go back to step 0

5) If array A *is empty, copy array B back to array A in its entirety

I leave it to you to actually come up with the actual code.

BTW, if you're going to be a programmer, you're going to have to learn how to come up with this kind of stuff on your own - seriously - this is pretty basic stuff.

Random Array Sort

2 solutions

Solution 1

Solution 2

Add your solution here

Preview 0