On Tue, 01 Jan 2019 22:56:06 -0800 Ian Lance Taylor <i...@golang.org> wrote:
> On Tue, Jan 1, 2019 at 6:42 PM Bakul Shah <ba...@bitblocks.com> wrote:
> >
> > On Tue, 01 Jan 2019 03:34:34 -0800 =?UTF-8?B?5LyK6Jek5ZKM5Lmf?=
> > <kazya.ito.dr...@gmail.com> wrote:
> > >
> > > What are the reasonable reasons to use pointers? Are pointers neseccary?
> >
> > Pointers are not necessary as a programming language feature
> > but are necessary in implementing a programming language. As
> > an example, Scheme doesn't have pointers.
>
> Scheme doesn't have pointers in the same sense that Java doesn't have
> pointers: in both Scheme and Java all non-primitive types are
> represented using pointers. So while it's true that the languages
> don't have pointers, you still have to understand that you are always
> dealing with reference types.
True but I'd rather keep pointers seperate from shared state.
There are other languages such as k that do pass compound
objects by value. Thus in k
x:1 2 3 4
f:{[v]v[1]:5} // similar to (define (f v) (vector-set! v 1 5))
f x
does *not* modify x. [It does this by using copy-on-write]
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