Hi Gregg, Thanks for your explanation. I do understand now the difference between copy and copy/deep. You only see the difference if you change something in a series and not when you completely replace a series inside a series. Thanks. Tim
Gregg Irwin wrote: >Hi Tim, > >TH> Can someone give me an example of the diffrence between copy and copy/deep? >TH> I can't find any differences... > >The /deep refinement tells REBOL to make copies of all nested series, >as well as the top level one. > >If we start with this: > > > >>>a: [[1 2 3] [4 5 6]] >>> >>> >== [[1 2 3] [4 5 6]] > > >>>b: copy a >>> >>> >== [[1 2 3] [4 5 6]] > > >>>c: copy/deep a >>> >>> >== [[1 2 3] [4 5 6]] > >There is no difference when we change the top level series > > > >>>append c 'xxx >>> >>> >== [[1 2 3] [4 5 6] xxx] > > >>>a >>> >>> >== [[1 2 3] [4 5 6]] > > >>>append b 'xxx >>> >>> >== [[1 2 3] [4 5 6] xxx] > > >>>a >>> >>> >== [[1 2 3] [4 5 6]] > >Now, if we change a sub-series, you'll see that copy/deep prevented >them from being changed in the original, while copy did not. > > > >>>append c/1 'yyy >>> >>> >== [1 2 3 yyy] > > >>>a >>> >>> >== [[1 2 3] [4 5 6]] > > >>>append b/1 'yyy >>> >>> >== [1 2 3 yyy] > > >>>a >>> >>> >== [[1 2 3 yyy] [4 5 6]] > >-- Gregg > > > -- To unsubscribe from the list, just send an email to lists at rebol.com with unsubscribe as the subject.
