Re: Resend: array = [NSArray new] or array = [NSArray array]?

[Alex Zavatone]

To all who replied, thank you.  This is awesome.

Thanks for outlining the difference between the two.  Now I know and can ignore 
it.  But if I didn't, I'd always be wondering.

This certainly puts my mind at ease.  Well, at least with regards to [NSArray 
new].  Other issues shall remain uneased for the moment.  

Cheers.
- Alex Zavatone

On Aug 19, 2016, at 12:59 PM, Gary L. Wade wrote:

> The class method new is the same as alloc/init although by implementation, it 
> may be faster if the class doesn't need to pass a placeholder object from 
> alloc—some classes do that. The class method array is much like 
> alloc/init/autorelease in the MRC days although it may coalesce things, but 
> that's an implementation detail you as a user shouldn't be too concerned 
> about.
> 
> The biggest cause for concern is if you're writing this code in MRC vs ARC 
> since you'd have to manage these memory points yourself.
> --
> Gary L. Wade (Sent from my iPhone)
> http://www.garywade.com/
> 
>> On Aug 16, 2016, at 7:42 AM, Alex Zavatone  wrote:
>> 
>> I sent this out this morning but it got eaten, so this is a resend.  Sorry 
>> if it gets to some of you twice.
>> 
>> 
>> 
>> Yes, I know about literals, but I have a different question here.
>> 
>> 
>> Is this safe?
>> 
>> I have seen this in some code in our codebase:
>> array = [NSArray new]; 
>> 
>> I'm familiar with using the public method from the NSArray header and what 
>> the docs say to use:
>> or array = [NSArray array];
>> 
>> Is there any risk to using [NSArray new] to init an array instead of 
>> [NSArray array]??
>> 
>> I'm surprised to see this being used in our codebase and would like to make 
>> sure we are not destroying the universe by using it.
>> 
>> Thank you in advance.
>> - Alex Zavatone
>> 
> 


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Re: Resend: array = [NSArray new] or array = [NSArray array]?

[Gary L. Wade]

The class method new is the same as alloc/init although by implementation, it 
may be faster if the class doesn't need to pass a placeholder object from 
alloc—some classes do that. The class method array is much like 
alloc/init/autorelease in the MRC days although it may coalesce things, but 
that's an implementation detail you as a user shouldn't be too concerned about.

The biggest cause for concern is if you're writing this code in MRC vs ARC 
since you'd have to manage these memory points yourself.
--
Gary L. Wade (Sent from my iPhone)
http://www.garywade.com/

> On Aug 16, 2016, at 7:42 AM, Alex Zavatone  wrote:
> 
> I sent this out this morning but it got eaten, so this is a resend.  Sorry if 
> it gets to some of you twice.
> 
> 
> 
> Yes, I know about literals, but I have a different question here.
> 
> 
> Is this safe?
> 
> I have seen this in some code in our codebase:
> array = [NSArray new]; 
> 
> I'm familiar with using the public method from the NSArray header and what 
> the docs say to use:
> or array = [NSArray array];
> 
> Is there any risk to using [NSArray new] to init an array instead of [NSArray 
> array]??
> 
> I'm surprised to see this being used in our codebase and would like to make 
> sure we are not destroying the universe by using it.
> 
> Thank you in advance.
> - Alex Zavatone
> 


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Re: Resend: array = [NSArray new] or array = [NSArray array]?

[David Duncan]

+new is alloc/init. +array is alloc/init/autorelease. Should be equivalent.

> On Aug 16, 2016, at 7:42 AM, Alex Zavatone  wrote:
> 
> I sent this out this morning but it got eaten, so this is a resend.  Sorry if 
> it gets to some of you twice.
> 
> 
> 
> Yes, I know about literals, but I have a different question here.
> 
> 
> Is this safe?
> 
> I have seen this in some code in our codebase:
> array = [NSArray new]; 
> 
> I'm familiar with using the public method from the NSArray header and what 
> the docs say to use:
> or array = [NSArray array];
> 
> Is there any risk to using [NSArray new] to init an array instead of [NSArray 
> array]??
> 
> I'm surprised to see this being used in our codebase and would like to make 
> sure we are not destroying the universe by using it.
> 
> Thank you in advance.
> - Alex Zavatone
> 
> 
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--
David Duncan


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Re: Resend: array = [NSArray new] or array = [NSArray array]?

[Charles Srstka]

> On Aug 16, 2016, at 9:42 AM, Alex Zavatone  wrote:
> 
> I sent this out this morning but it got eaten, so this is a resend.  Sorry if 
> it gets to some of you twice.
> 
> 
> 
> Yes, I know about literals, but I have a different question here.
> 
> 
> Is this safe?
> 
> I have seen this in some code in our codebase:
> array = [NSArray new]; 
> 
> I'm familiar with using the public method from the NSArray header and what 
> the docs say to use:
> or array = [NSArray array];
> 
> Is there any risk to using [NSArray new] to init an array instead of [NSArray 
> array]??
> 
> I'm surprised to see this being used in our codebase and would like to make 
> sure we are not destroying the universe by using it.

They’re both perfectly fine. [NSArray new] is just a synonym for [[NSArray 
alloc] init], whereas [NSArray array] is a synonym for [[[NSArray alloc] init] 
autorelease].

In ARC, I actually prefer +new, as there’s no difference UI-wise, and it keeps 
the array out of the autorelease pool.

Charles


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Re: Resend: array = [NSArray new] or array = [NSArray array]?

[Ryan Dignard]

Under ARC there should be no appreciable difference.  People who prefer
+new will generally point out it's a keyword or operator in other languages
so its meaning is not ambiguous.

With manual reference counting, the difference is that +array is
autorelease where as with +new your code is responsible for releasing the
object.  Some projects used to discourage the use of +new as it was one
less selector/function name to memorize (i.e. copy, alloc, create..., new).

On Tue, Aug 16, 2016 at 7:42 AM, Alex Zavatone  wrote:

> I sent this out this morning but it got eaten, so this is a resend.  Sorry
> if it gets to some of you twice.
>
>
>
> Yes, I know about literals, but I have a different question here.
>
>
> Is this safe?
>
> I have seen this in some code in our codebase:
> array = [NSArray new];
>
> I'm familiar with using the public method from the NSArray header and what
> the docs say to use:
> or array = [NSArray array];
>
> Is there any risk to using [NSArray new] to init an array instead of
> [NSArray array]??
>
> I'm surprised to see this being used in our codebase and would like to
> make sure we are not destroying the universe by using it.
>
> Thank you in advance.
> - Alex Zavatone
>
>
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Resend: array = [NSArray new] or array = [NSArray array]?

[Alex Zavatone]

I sent this out this morning but it got eaten, so this is a resend.  Sorry if 
it gets to some of you twice.



Yes, I know about literals, but I have a different question here.


Is this safe?

I have seen this in some code in our codebase:
array = [NSArray new]; 

I'm familiar with using the public method from the NSArray header and what the 
docs say to use:
or array = [NSArray array];

Is there any risk to using [NSArray new] to init an array instead of [NSArray 
array]??

I'm surprised to see this being used in our codebase and would like to make 
sure we are not destroying the universe by using it.

Thank you in advance.
- Alex Zavatone


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