how to Add Value to Array

Question

1.00/5 (1 vote)

See more:

I have Available room in

IEnumerable<int> p

and I want to them in Array m[raj]

I am using following code but it gives an error

C#

for (int raj = 0; raj < m.Length; raj++)
      {
       m[raj] = p[raj];
      }

Posted 27-May-15 0:33am

Shrikesh_kale

Updated 27-May-15 1:01am

King Fisher

v3

Add a Solution

Comments

King Fisher 27-May-15 7:01am

you cant change array size on run time.so, You can use Array List.

2 solutions

Solution 1

Arrays have a predefined size that cannot change. You could use Array.Resize (not the best option performance wise) or use a List and call ToArray on that when you are done to get an actual array (if really needed). Check the links for more info/.

https://msdn.microsoft.com/en-us/library/bb348051%28v=vs.110%29.aspx[^]

https://msdn.microsoft.com/en-us/library/6sh2ey19%28v=vs.110%29.aspx[^]

Good luck!

Posted 27-May-15 0:48am

E.F. Nijboer

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)

Sascha Lefèvre · Accepted Answer · 2015-05-27T07:57:00

It's not quite clear what the actual problem here is. So here are some suggestions:

The IEnumerable-interface doesn't have an indexer. For p[raj] to work, p would have to be not a "plain" IEnumerable but an array or a List or something else that allows indexing. Otherwise you would have to use ElementAt(..) to get the element of an IEnumerable at a specified position:

C#

m[raj] = p.ElementAt(raj);

(This has potentially a really bad performance because it needs to iterate the elements of the IEnumerable to find the n'th one.)

You can just call ToArray() on any IEnumerable to get an array with the same elements:

C#

var m = p.ToArray();

If you want to limit the amount of elements from p that will be "put" into the array (as you seem to with your for-loop-predicate) you can use Take(..) to take just the first X elements:

C#

int amount = ...
var m = p.Take(amount).ToArray();

If you can't solve your issue with these hints, please leave a comment and tell the actual error message you're getting.