Execute function as string

Question

How can I execute a Javascript function such this:

cursor.continue(parameters)

By using a string to identify the function name, without using eval? Something like this:

cursor.callMethod("continue", parameters);

Is this possible?

@MelanciaUK: I don't believe it is a duplicate of that question. — Ian, Jan 10 '14 at 13:29

score 7 · Accepted Answer · answered Jan 10 '14 at 13:27

7

Yes, you can use the square bracket notation.

cursor["continue"](parameters)

cursor["continue"] is exactly the same as cursor.continue.

answered Jan 10 '14 at 13:27

techfoobar

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score 2 · Answer 2 · answered Jan 10 '14 at 13:29

2

If you are in control of callMethod, and the function belongs to an object or is global, then yes, that's possible.

For example, if the target function is a method of the same object where callMethod is:

var cursor = {
    callMethod: function(method, params) {
        this[method].apply(this, params);
    },
    continue: function() {}
}
cursor.callMethod("continue", [1, 2, 3]);

answered Jan 10 '14 at 13:29

bfavaretto

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Unfortunately the `cursor` is an IndexedDB cursor, so techfoobar's solution is more appropriate, but definitely +1 for the literal implementation of my example method. – CodingIntrigue Jan 10 '14 at 13:52

score 0 · Answer 3 · answered Jan 10 '14 at 13:28

0

Yes, you can call the function like so:

cursor["continue"](parameters);

answered Jan 10 '14 at 13:28

Richard Dalton

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Execute function as string

3 Answers3