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+1 A:

You probably mean

$(variable).DoThis();

This implies that variable is

a plain DOM object (or an array of them)
a jQuery object (or an array of them)
a string that contains a jQuery selector
a string that contains HTML/XML markup
a callback function for the "DOM ready" event (not relevant in this case)

If it something else, all bets are off.

Tomalak 2010-04-21 18:49:05

Also, this may not do the same thing; for example `$.isFunction(someObject)` is not at all the same as `$(someObject).isFunction()` (the latter will presumably always evaluate null as the parameter and return false).

JacobM 2010-04-21 18:55:23

@JacobM: Yes, of course. But the OP mentioned `$.DoThis(variable)` himself, and seemed to ask "How do I make a jQuery object out of `variable`?". That's why I said "probably" ;)

Tomalak 2010-04-21 18:58:37

Granted, but I think the OP has the expectation that making his variable into a jQuery object, and calling a jQuery function on it, will be the equivalent of calling a jQuery function and passing in his variable. That expectation, even if the variable is something that's convertible into a jQuery object as you describe, isn't valid. I'm not criticizing your answer here, I'm pointing out a flaw in (what I think is) the expectation of the OP.

JacobM 2010-04-21 19:21:18

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