C#•3y ago

✅ variables declared with/without the “new” keyword.

What difference does using the word

new

new

make in the code? even in terms of memory allocations n stuff.

also in this code how many

TrialObjects

TrialObjects

objects were created?

TrialObjects testObj1 = new TrialObjects("some string argument1");
TrialObjects testObj2 = new TrialObjects("some string argument2");
TrialObjects testObj3 = testObj1;

TrialObjects testObj1 = new TrialObjects("some string argument1");
TrialObjects testObj2 = new TrialObjects("some string argument2");
TrialObjects testObj3 = testObj1;

Thinker•4/7/23, 3:33 PM

two objects are created here

Thinker•4/7/23, 3:34 PM

In general,

new

new

means a new object is created.

Thinker•4/7/23, 3:35 PM

The variables here aren't declared with the

new

new

keyword, they're just assigned a new object.

SolwayFirthOP•4/7/23, 3:35 PM

and does this have to do anything with stack/heap

sibber•4/7/23, 3:37 PM

if the thing youre newing is a reference type, itll be allocated on the heap

sibber•4/7/23, 3:37 PM

otherwise its on the stack

SolwayFirthOP•4/7/23, 3:38 PM

so in this example, would the testObject1 be on the stack?

sibber•4/7/23, 3:39 PM

if its a reference type

sibber•4/7/23, 3:39 PM

classes are reference types

SSolwayFirth so in this example, would the testObject1 be on the stack?

Thinker•4/7/23, 3:41 PM

reference type (class, interface, delegate) -> heap
value type (struct) -> stack

SolwayFirthOP•4/7/23, 3:42 PM

noted

SolwayFirthOP•4/7/23, 3:42 PM

cheers

Ssibber otherwise its on the stack

qqdev•4/7/23, 4:06 PM

Often times but not always yep. Even structs can land on the heap

sibber•4/7/23, 4:07 PM

wdym not always?

sibber•4/7/23, 4:07 PM

when does newing a struct allocate it on the heap

qqdev•4/7/23, 4:08 PM

This is a good read

qqdev•4/7/23, 4:08 PM

https://stackoverflow.com/a/4853251

Stack Overflow

Are Structs always stack allocated or sometimes heap allocated?

I was of the impression that in C#, struct elements are allocated on the stack and thus disappear when returning from a method in which they were created. But what happens if I place the struct-val...

sibber•4/7/23, 4:08 PM

oh when theyre a member of a class yeah of course

sibber•4/7/23, 4:08 PM

or an array

sibber•4/7/23, 4:08 PM

i was thinking in the context of a function

sibber•4/7/23, 5:47 PM

$close

Ssibber $close

MODiX•4/7/23, 5:47 PM

Use the

/close

/close

command to mark a forum thread as answered