Minimalist Classes

Brendan Eich brendan at mozilla.com
Wed Nov 2 19:02:32 PDT 2011


On Nov 2, 2011, at 7:00 PM, Brendan Eich wrote:

> Updated: https://gist.github.com/1332193
> 
> $ git commit -a -m"Updates per conversations with @dflanagan and @allenwb."
> 
> git diff output below. Exec. summary: prefix groups via { ... } and public @-namespace population to avoid "this." sad-making verbosity.
> 
> /be
> 
> diff --git a/minimalist-classes.js b/minimalist-classes.js
> index 18a7a8c..6f25144 100644
> --- a/minimalist-classes.js
> +++ b/minimalist-classes.js
> @@ -188,8 +188,11 @@ class Monster {
>  // See the new sameName method for an example of infix and prefix @ in action.
>  //
>  // David Flanagan suggests keeping the unary-prefix @foo shorthand, but making
> -// the long-hand obj. at foo. Breaks E4X but no matter -- I'm open to it, but it
> -// is not essential to bikeshed here.
> +// the long-hand obj. at foo. Breaks E4X but no matter -- but the win is that the
> +// [no LineTerminator here] restriction on the left of unary-prefix @ is not
> +// needed. Also the references don't grep like email addresses, which counts
> +// with David and me. So I've incorporated David's suggestion. See other. at name
> +// etc. below.
>  //
>  // There is no const instance variable declaration. Non-writable instance vars
>  // (properties to most people) are quite rare. Use ES5's Object.defineProperty
> @@ -203,15 +206,17 @@ class Monster {
>  
>  class Monster {
>  
> -  private name, health;
> +  private { name, health }, // can group a prefix, same for const and static
> +  public flair,             // you should have 37 pieces of public flair
>  
>    constructor(name, health) {
>      @name = name;
>      @health = health;
> +    @flair = 0;
>    }
>  
>    sameName(other) {
> -    return @name === other at name;
> +    return @name === other. at name;
>    }
>  
>    private attackHelper(target) {
> 

Quick followup:

$ git diff
diff --git a/minimalist-classes.js b/minimalist-classes.js
index 6f25144..7d8195e 100644
--- a/minimalist-classes.js
+++ b/minimalist-classes.js
@@ -206,7 +206,10 @@ class Monster {
 
 class Monster {
 
-  private { name, health }, // can group a prefix, same for const and static
+  private { name, health }  // can group a prefix, same for const and static
+                            // note comma optional after closing brace, as for
+                            // method definitions
+
   public flair,             // you should have 37 pieces of public flair
 
   constructor(name, health) {
$ git commit -a -m"More comma elision."
[master 4f47332] More comma elision.
 1 files changed, 4 insertions(+), 1 deletions(-)

/be

> On Nov 1, 2011, at 6:56 PM, Brendan Eich wrote:
> 
>> On Nov 1, 2011, at 5:18 PM, Brendan Eich wrote:
>> 
>>> On Oct 31, 2011, at 6:57 PM, Jeremy Ashkenas wrote:
>>> 
>>>> 'Evening, ES-Discuss.
>>>> 
>>>> After poking a stick in the bees' nest this morning (apologies, Allen), and in the spirit of loyal opposition, it's only fair that I throw my hat in the ring. 
>>>> 
>>>> Here is a proposal for minimalist JavaScript classes that enable behavior that JavaScripters today desire (as evidenced by libraries and languages galore), without adding any new semantics beyond what already exists in ES3.
>>>> 
>>>> https://gist.github.com/1329619
>>>> 
>>>> Let me know what you think, and feel free to fork.
>>> 
>>> Thanks, I did fork, and I made a Rich Corinthian Leather version, for the reasons given in the comments. In brief, I contend that over-minimizing will please no one: class haters still gonna hate, while class lovers used to batteries-and-leather-included will find the bare sheet metal poky and painful.
>>> 
>>> Love it or hate it, I'm ok either way :-P. But I do crave intelligent responses.
>> 
>> Handy link included: https://gist.github.com/1332193
>> 
>> /be
>> 
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>> https://mail.mozilla.org/listinfo/es-discuss
> 
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