Also, IMHO this yields high level of encapsulation of an important
mechanism.
Which is a good thing.
And it is a fraction of a micro second slower then
Object.prototype.toString.call(x) === "[object Object]"
but it is more compact ...
In any case we are entering the subjective judgement phase, so I think
we should stop here and leave it to jQuery team to use this or not...
--DBJ
On Jul 26, 12:09 am, Andrea Giammarchi <andrea.giammar...@gmail.com>
wrote:
> I miss the point about regexp usage ... please tell me the difference (in a
> real scenario) between these two checks:
>
> Object.prototype.toString.call(x) === Object.prototype.toString.call({})
>
> and
>
> Object.prototype.toString.call(x).match(/\w+/g)[1] ===
> Object.prototype.toString.call({}).match(/\w+/g)[1]
>
> finally please tell me the difference with this:
>
> Object.prototype.toString.call(x) === "[object Object]"
>
> I am usually against redundant, slow, or superflous code ... maybe I am
> wrong here, am I?
>
>
>
> On Sat, Jul 25, 2009 at 1:38 PM, DBJDBJ <dbj...@gmail.com> wrote:
>
> > This indeed woks : function isObj(o){ return
> > Object.prototype.toString.call(o) === '[object Object]' }
>
> > But I do not like it ;o) It does not seem very exact somehow ... I
> > mean using a string literal, and all that...
> > I would suggest this very simple and robust little set of functions :
>
> > // and now much simpler implementation
> > function isWhat(o){ return Object.prototype.toString.call(o).match(/\w
> > +/g)[1]; }
>
> > function isObject(x) { return isWhat(x) === isWhat({}); }
> > function isArray(x) { return isWhat(x) === isWhat([]); }
> > function isFunction(x) { return isWhat(x) === isWhat(Function()); }
> > function isString(x) { return isWhat(x) === isWhat(""); }
> > function isNumber(x) { return isWhat(x) === isWhat(1); }
>
> > No obfuscations here, and no "awesome" code. This seems very simple
> > and robust solution to me.
>
> > --DBJ
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