On Tue, 15 Oct 2019 03:16:35 -0700 (PDT)
Stuart Davies <sdd.dav...@gmail.com> wrote:

> Hi 
> 
> I have a slice backed by an array. 
> 
> My understanding is that I can extend the slice (append)  up to the 
> capacity of the array.

Its good understanding.

> Append fails when the backing array indexes are exceeded.
"exceeded" means "over the capacity"  

> I know there must be an array copy function that will do this more 
> efficiently but I failed to find it!

It is a built-in function and is aptly named "copy": 

https://golang.org/ref/spec#Appending_and_copying_slices

> Please help.

Hope this helps,

-- 
Wojciech S. Czarnecki
 << ^oo^ >> OHIR-RIPE

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