Hi,

> if use prototype.js, can't use "for..in" for Array object ?

Correct, and even if not using Prototype, you shouldn't use for..in
for that.  That's not what it's for.  More here:
http://proto-scripty.wikidot.com/prototype:tip-looping-through-arrays

HTH,
--
T.J. Crowder
tj / crowder software / com
Independent Software Engineer, consulting services available

On Jun 10, 3:15 am, favril <hsanog...@gmail.com> wrote:
> use prototype-1.6.0.3
>
> ---- code ----
> var array = [];
> console.log('length: ' + array.length);
> for(var i in array) {
>   console.log('key: ' + i);
>   console.log('val: ' + array[i]);}
>
> ----/ code ----
>
> ---- result ----
> length: 0
> key: each
> val: function (iterator, context) { ... }
> key: eachSlice
> val: function (number, iterator, context) { ... }
>   ...
> key: toJSON
> val: function () { ... }
> ----/ result ----
>
> if use prototype.js, can't use "for..in" for Array object ?
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