Wow. It appears that Vector and Array support in Falcon has more holes
than I expected.
-The parameters to both “new Vector” and the Vector function are not
checked.
-The parameters to the Array function are not checked.
-FalconJX does not generate the right output for the Vector function.
IMO, the right way to support Vector in general would be to have FalconJX
convert Vector calls to some new class like org.apache.flex.utils.Vector.
Different implementations of FlexJSVector could add type-checking. That
way folks can pay-as-you-go for the trade-off of type-checking vs
performance. I’d rather not bake that into the compiler, but it does mean
one more class like org.apache.flex.utils.Language that is needed for
low-level JS apps.
I could try a simple implementation in the compiler for now. I believe
the right JS output for:
var a:Vector.<String> = Vector.<String>(someArrayOrVector);
would just be:
var a = someArrayOrVector.slice();
because we are mapping Vector to Arrays that don’t have any type-checking.
Thoughts?
-Alex
On 11/3/15, 8:13 AM, "Alex Harui" <aha...@adobe.com> wrote:
>Added subject tag.
>
>Lizhi is correct. I don’t think we realized the Vector global function
>had different behavior than the Array global function. It opens a
>question about whether the compiler should generate the “correct” code or
>whether Vector should be implemented in the framework in a way that folks
>can swap in different Vector emulations. Some folks may want to pay the
>price of some type-checking.
>
>Figures this would come up after I posted an RC, but since lizhi knows how
>to work with nightly builds I think I want to see what else is found
>before the voting period is up before deciding whether to try to make a
>change for this release. IMO, it should wait for the next one because we
>should do the extra work of allowing swappable emulations, which would be
>rather risky for this release.
>
>Thoughts?
>-Alex
>
>On 11/3/15, 4:37 AM, "Harbs" <harbs.li...@gmail.com> wrote:
>
>>I think you need “new”…
>>
>>On Nov 3, 2015, at 9:55 AM, lizhi <s...@qq.com> wrote:
>>
>>> var vec:Vector.<Number> = Vector.<Number>([1, 2, 3]);
>>> alert(vec.length);
>>> I need 3,but get 0
>>>
>>>
>>>
>>>
>>> ------------------ Original ------------------
>>> From: "Alex Harui [via Apache Flex
>>>Development]"<ml-node+s2333347n4978...@n4.nabble.com>;
>>> Date: 2015年11月3日(星期二) 下午3:41
>>> To: "lizhi"<s...@qq.com>;
>>> Subject: Re: vector error
>>>
>>>
>>>
>>> What output are you getting and what error occurs?
>>>
>>> -Alex
>>>
>>> On 11/2/15, 10:39 PM, "lizhi" <[hidden email]> wrote:
>>>
>>>> in as3.
>>>> new Vector.<*>([1,1,1]);
>>>> not the same Vector.<*>([1,1,1]);
>>>>
>>>> pls try
>>>>
>>>>
>>>>
>>>> --
>>>> View this message in context:
>>>>
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>>>>7
>>>>2p
>>>> 49783.html
>>>> Sent from the Apache Flex Development mailing list archive at
>>>>Nabble.com.
>>>
>>>
>>>
>>>
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>>
>
