About clone an object (maps, slices, channels)

[atomaths]

Some types—maps, slices, and channels—have reference semantics.
How do I need to copy one object to another variable?

like Java's clone method...

Best regards.

[Ian Lance Taylor]

atomaths <atom...@gmail.com> writes:

> Some types—maps, slices, and channels—have reference semantics.
> How do I need to copy one object to another variable?

There is no direct way to copy them. Code which clones an arbitary
map was posted on this list a day or two ago. Copying a slice
is more or less
dest := make([]T, len(source));
copy(dest, source);
(copy was added quite recently, though). Copying a channel doesn't
make a great deal of sense, though it's easy enough to make a new one.


inspector_jouve <kaush...@gmail.com> writes:

> look at reflect.DeepCopy

There is a reflect.DeepEqual, but there is no reflect.DeepCopy yet.
Though I'm sure we would look if somebody wrote one.

Ian

[Jan Mercl]

On Saturday, December 5, 2009 3:43:52 AM UTC+1, Ian Lance Taylor wrote:

There is a reflect.DeepEqual, but there is no reflect.DeepCopy yet.
Though I'm sure we would look if somebody wrote one.

Being in a need for DeepCopy I found this thread and taruti's take on the task:

https://bitbucket.org/taruti/deepcopy/src 

If the above, posted in 2009, still holds, can it be possibly upgraded and incorporated into the current reflect package now? I will happily cooperate on this task if needed.

[roger peppe]

inspired by taruti's DeepCopy, i wrote a version some time ago that
also deals with recursive data structures and self-references.
those issues make DeepCopy somewhat harder than DeepEqual.

rog-go.googlecode.com/hg/exp/deepcopy

[Jan Mercl]

On Tuesday, April 26, 2011 2:18:52 PM UTC+2, rog wrote:

inspired by taruti's DeepCopy, i wrote a version some time ago that
also deals with recursive data structures and self-references.
those issues make DeepCopy somewhat harder than DeepEqual.

rog-go.googlecode.com/hg/exp/deepcopy

Nice, thank you. Let's see what are the dev team thoughts about it.