new List with or without parentheses

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Hi experts,

we can create a list of known bytes in two similar ways:

C#

List<byte> withParentheses = new List<byte>() {1,2,3,4,5};
List<byte> withoutParentheses = new List<byte> {6,7,8,9,10};

Both seem to work.

What is the difference between the two?
Is one of them preferrable over the other?

Posted 1-Aug-11 1:41am

lukeer

Updated 1-Aug-11 1:47am

walterhevedeich

v2

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BobJanova 1-Aug-11 11:05am

Heh, I didn't know this was possible. Thanks for the tip!

2 solutions

Solution 2

It might be helpful,

CSharp 3 0overview[^]

:)

Posted 1-Aug-11 2:01am

Mohammad A Rahman

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Sergey Alexandrovich Kryukov 1-Aug-11 10:31am

The good idea is: read C# manual (or reference before asking), but: why 3.0? what part of it answers the question?
--SA

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Abhinav S · Accepted Answer · 2011-08-01T01:50:00

Solution 1

Nothing, as far as your example is concerned.

In the first case, you could actually define the array count in the first statement but add values to it later.
E.g.
List<byte> withParentheses = new List<byte>[4];
withParentheses[0]=1;
withParentheses[1]=2;

In the second case, you don't have that liberty. You must define some initial values in the array (as you have done).

Posted 1-Aug-11 1:50am

Abhinav S

Updated 1-Aug-11 1:53am

v4

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#realJSOP 1-Aug-11 8:03am

5 - proposed as answer

Abhinav S 1-Aug-11 8:06am

Thank you.

Sergey Alexandrovich Kryukov 1-Aug-11 10:29am

Agree, my 5.
A short comment "you don't have that liberty". In exchange of liberty of not supplying elements at the point of initialization you get another liberty of not specifying the length -- in either form.
--SA

Abhinav S 1-Aug-11 10:32am

Agreed.
Thank you SA.

lukeer 2-Aug-11 3:05am

My question did not contain sqare brackets. Do I understand you correctly, that sqare brackets for arrays behave exactly like parentheses for generic lists (within the given context)?