If you use the brakets notation you can use all kind of weird things loke
spaces, dashes, slash etc
foo["bar lala / oia"] = 12345;
But you will be never able to call this with dot notation
El miércoles, 12 de diciembre de 2012, José F. Romaniello escribió:
> Object keys are always strings (or converted to string) you can reference
> it with dot or with square brakets and string...
>
> foo.bar
>
> does the same than
>
> foo["bar"]
>
> always, but you can do also
>
> var thekey = "key";
> foo[thekey]...
>
> Some useful methods:
>
> thekey in foo // will return true if foo has a property named thekey
> Object.keys(foo) // returns an array of string with all enumerable
> properties
>
>
> El miércoles, 12 de diciembre de 2012, spqr escribió:
>
>>
>> Thanks for your help on this, I think you solved my problem with "this"
>> by helping me avoid eval().
>> Coming at JavaScript with some history in lisp, maybe my question should
>> have been "why does JavaScript have eval()?" ;-)
>> (Hah! I know it still has its uses...)
>>
>> I just constructed this code:
>>
>> var myobjs = { p1234: { a: 1,
>> b: function() { var c = this.a; return 0; }},
>> p2345: { a: 2,
>> b: function() { var c = this.a; return 1; }}};
>>
>> var q = "p1234";
>> myobjs[q].b();
>>
>> I ran a quick test and it works like a charm. I noticed that the object
>> keys can be
>> literals or strings and it still works. Is there any preference on which
>> to use?
>>
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