Re: [RFC] Syntax for appending elements to arrays

[Dan Čermák]

Hi Jose,

"Jose E. Marchesi" <jemarch@gnu.org> writes:
>
> 2) To only allow the statement form:
>
>    var a = [1,2,3];
>    a += 4;
>
> I think I am inclined for 2) more than for 1), because it makes the
> side-effect more explicit.

I'd prefer option 2, as I have grown to hate hidden side effects and
mutability.

>
> A disadvantage of 2) is that not allowing `[1,2,3] + 4' may be
> unexpected for the programmer.

It could be unexpected, but with my functional programming hat on, I'd
rather expect that to create a new array that equals `[1,2,3,4]` but
does not modify `[1,2,3]`. So not having this syntax removes this
ambiguity ;-)


Cheers,

Dan

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