Re: set vs copy?
Re: set vs copy?
- Subject: Re: set vs copy?
- From: Thomas Fischer <email@hidden>
- Date: Wed, 15 Sep 2010 08:51:13 +0200
Hi Mark,
I still don't understand when the second variable get its on value.
I agree that your example shows nicely that A and B point to the same variable.
But
set A to {1, 2, 3}
set B to A
copy A to C
set A to {6, 7, 8}
set text item delimiters to ","
log ("A is " & A as text)
log ("B is " & B as text)
log ("C is " & C as text)
yields
(*A is 6,7,8*)
(*B is 1,2,3*)
(*C is 1,2,3*)
Why that?
Cheers
Thomas
Am 15.09.2010 um 01:51 schrieb Mark J. Reed:
> set A to {1,2,3}
> set B to A
> copy A to C
>
> set end of A to 4
> set end of B to 5
>
> set text item delimiters to ","
> log("A is " & A as text)
> log("B is " & B as text)
> log("C is " & C as text)
>
> Result:
>
> A is 1,2,3,4,5
> B is 1,2,3,4,5
> C is 1,2,3
>
>
> A and B are both pointing to a single list; changing that list,
> whether you go through A or B, results in a change visible through
> both. C is a separate copy of that list made when it only had 3
> elements, unaffected by subsequent modifications to the original. You
> can, of course, now go and modify C, and it won't affect A or B.
> _______________________________________________
> Do not post admin requests to the list. They will be ignored.
> AppleScript-Users mailing list (email@hidden)
> Help/Unsubscribe/Update your Subscription:
> Archives: http://lists.apple.com/archives/applescript-users
>
> This email sent to email@hidden
Attachment:
smime.p7s
Description: S/MIME cryptographic signature
_______________________________________________
Do not post admin requests to the list. They will be ignored.
AppleScript-Users mailing list (email@hidden)
Help/Unsubscribe/Update your Subscription:
Archives: http://lists.apple.com/archives/applescript-users
This email sent to email@hidden