Delete first element of array before pushing a new one

Question

I'm using FireSharp to manage an array of items in a Firebase Realtime database.

I'm trying to implement a kind of queue of 30 messages.

I want to manage only 30 messages and if a new message is received, the first in time order should be deleted.

How can i do it?

In this moment I'm just adding items to the array in this way:

IFirebaseConfig config = new FirebaseConfig{
        BasePath = _RHDLLConfig.firebaseJsonUrl
};
IFirebaseClient client = new FirebaseClient(config);

client.Push("signals", rh);

I want to delete the first element before to push a new one...

The array looks like this:

How can I do it?

score 1 · Answer 1 · answered May 08 '19 at 14:23

1

This will remove the first element of the array

signals = signals.Skip(1).ToArray();

answered May 08 '19 at 14:23

Carlos Alves Jorge

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so it means that before to push I have to do a GET of the entire array and the work on it ? – DarioN1 May 08 '19 at 14:25
You can also loop the array and make signals[0]=signals[1], signals[1]=signals[2] and so on... Then you make signals[19] your new one. – Carlos Alves Jorge May 08 '19 at 14:31
This is because in c# arrays will always be fixed sized. – Carlos Alves Jorge May 08 '19 at 14:32
actually my array is structured so I have to manage it using lists – DarioN1 May 08 '19 at 14:32
2

Lists are actually easier to work with... You could just do signals.RemoveAt(0); – Carlos Alves Jorge May 08 '19 at 14:34

Delete first element of array before pushing a new one

1 Answers1