[OpenLayers-Users] Result of expression 'map' [undefined] is not an object.

[Roald de Wit]

Hi,

On 05/10/09 14:53, P Kishor wrote:
> On Sun, Oct 4, 2009 at 10:44 PM, Stephen Woodbridge
> <woodbri at swoodbridge.com>  wrote:
>
>> Kishor,
>>
>> I'm pretty sure that the trailing common is not portable across browsers, as
>> I'm sure I have had problems with that in the past. It is a common model
>> that I learned in Perl, but it is not supported by most other languages. :(
>>
> Yup, I too picked up that good habit in Perl, and thoroughly enjoy
> being lazy with it. That said, I am doing development right now and
> testing in both Safari 4.x and Firefox 3.5x, and the trailing comma
> seems to work fine. I don't have access to any version of IE (well,
> not easily anyway) so I haven't really tested.
>
> Can someone please confirm the browsers/versions in which the trailing
> comma croaks?
>

This is a confirmation: using a trailing comma in an object (curly
brackets) is an easy way to bring IE6/7/8 to its knees and hard to debug
without developer tools.
Any other browser (that I know of) has no issues with it, only IE.

Regards,

Roald


>
>
>> -Steve
>>
>> P Kishor wrote:
>>
>>> On Sun, Oct 4, 2009 at 12:13 PM, Andreas Hocevar<ahocevar at opengeo.org>
>>> wrote:
>>>
>>>> Also make sure that you don't have extra commas at the end of object
>>>> definitions.
>>>>
>>>>
>>> if you mean, do like this
>>>
>>> var foo = { a: 'blah', b: 'blech' };
>>>
>>> and not like
>>>
>>> var foo = { a: 'blah', b: 'blech', };
>>>
>>> let me ask you, why not? Javascript doesn't mind, and it makes my
>>> programming a lot easier to let there be a comma at the end.
>>>
>>>
>>>
>>>
>>>
>>>> Regards,
>>>> Andreas.
>>>>
>>>> Stephen Woodbridge wrote:
>>>>
>>>>> Nicholas Efremov-Kendall wrote:
>>>>>
>>>>>
>>>>>> Hi all,
>>>>>>
>>>>>> I'm getting the following error in what used to be functional
>>>>>> code Result of expression 'map' [undefined] is not an object.
>>>>>>
>>>>>> It's breaking on the statement map.addLayer(cities). Here's the
>>>>>> exerpted
>>>>>> code that I've added around this. I can add a stripped down version of
>>>>>> the rest, but it's bulky and I've only messed with the following bits.
>>>>>> Any suggestions as to what's causing this error?
>>>>>>
>>>>>> var styleMap = new OpenLayers.StyleMap(
>>>>>> {'default':OpenLayers.Util.applyDefaults(
>>>>>> {
>>>>>>       label: '${Name}',
>>>>>>       strokeWidth:1,
>>>>>>       strokeColor:"#CCCCCC",
>>>>>>       fillColor: "green",
>>>>>> })
>>>>>> }
>>>>>>    );
>>>>>> };
>>>>>>
>>>>>> var cities = new OpenLayers.Layer.GML
>>>>>> ("7th Century Cities", "data/cities.gml",
>>>>>> {
>>>>>> styleMap: styleMap,
>>>>>> projection: new OpenLayers.Projection("EPSG:4326"),
>>>>>> format: OpenLayers.Format.GML,
>>>>>> label: "${Name}",
>>>>>> }
>>>>>> );
>>>>>> map.addLayer(cities);
>>>>>>
>>>>>>
>>>>> Where is "var map" defined. It sounds like it is not in the visible
>>>>> scope of the above code.
>>>>>
>>>>> -Steve W
>>>>> _______________________________________________
>>>>> Users mailing list
>>>>> Users at openlayers.org
>>>>> http://openlayers.org/mailman/listinfo/users
>>>>>
>>>>>
>>>> --
>>>> Andreas Hocevar
>>>> OpenGeo - http://opengeo.org/
>>>> Expert service straight from the developers.
>>>>
>>>> _______________________________________________
>>>> Users mailing list
>>>> Users at openlayers.org
>>>> http://openlayers.org/mailman/listinfo/users
>>>>
>>>>
>>>
>>>
>>>
>>
>>
>
>
>


--
Roald de Wit
Software Engineer
roald.dewit at lisasoft.com

Commercial Support for Open Source GIS Software
http://lisasoft.com/LISAsoft/SupportedProducts/



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