the fast ways to create a list

[desanti]

Hello ! Is there any fast way to create a list of obj1(Integer,string) , where the first field is an integer from 1-2000 , and the second field is the same string. , so the list should be : (1,"a") , (2,"a"),(3,"a")........(2000,"a"). I know that with a for loop can I create this , but i'm asking if there's a more fast way. Thank you !

[Richard Deeming]

Depends what you mean by "fast". :) If you mean you want to save on typing, then try LINQ:

Dim myList As List(Of obj1) = Enumerable.Range(1, 2000).Select(Function(i) New obj1(i, "a")).ToList()

If you want the code to execute faster, then a For loop is probably your best bet. If you know the size of the list, then make sure you specify the initial capacity, to avoid having to reallocate the internal storage over and over again. List<T>.Capacity Property (System.Collections.Generic) | Microsoft Docs[^]

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"These people looked deep within my soul and assigned me a number based on the order in which I joined." - Homer

[desanti]

for loop is faster than Linq ? In other occasions , the for loop was very slower than Linq

[Lost User]

desanti wrote:

In other occasions , the for loop was very slower than Linq

Measured by you on a timer? One is a simple loop, the other a call to an interface to return an object on each iteration. Which of the two do you think would be faster? Also, instead of having a list, this would probably be done faster by casting the int to a string when you need it, instead of having it in memory in a non-array.

Bastard Programmer from Hell :suss: If you can't read my code, try converting it here[^] "If you just follow the bacon Eddy, wherever it leads you, then you won't have to think about politics." -- Some Bell.