Parameter as actual code substitution in Javascript

Question

I would like to pass a parameter to a function that is used as an actual piece of code

this.illuminateLeg = function(whom) {
    var propertiesToIlluminate = [], prop, illuminateInternal, i = 0, delay = 100, intervalId;
    for (key in this.whom.zoom) {
        propertiesToIlluminate.push(this.whom.zoom[key]);
    }
}

I am trying to pass a whom parameter that is used to iterate over whom properties of my object.

I know its possible to pass strings as arguments, but how about actual pieces of code?

Is it possible to do so?

Your question is really unclear. Are you trying to access property of this, but you want to get property name from whom argument? Then use square bracket syntax, as suggested in answer below. Or you want to pass function ("piece of code") as argument? Then just pass it. — Tommi
– Tommi, Commented Jul 5, 2014 at 16:42

Johnbabu Koppolu · Accepted Answer · 2014-07-05 16:39:11Z

2

Something like this?

 for (key in this[whom].zoom)

Instead of

for (key in this.whom.zoom)

and then call the function like this

this.illuminateLeg("whom")

answered Jul 5, 2014 at 16:39

Johnbabu Koppolu

3,2622 gold badges26 silver badges34 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Platinum Azure · Accepted Answer · 2014-07-05 16:43:59Z

1

If the value of whom is the name of a property, you can do this:

for (key in this[whom].zoom) {

Otherwise, you could allow callers to pass in a function which takes the object:

this.illuminateLeg = function(getWhom) {
    /* ... */

    for (key in getWhom(this).zoom) {
        /* ... */
    }

// Call with function as argument:
obj.illuminateLeg(function (param) {
    return param.somebody.somethingElse;
});

answered Jul 5, 2014 at 16:43

Platinum Azure

46.4k13 gold badges112 silver badges136 bronze badges

Collectives™ on Stack Overflow

Parameter as actual code substitution in Javascript

2 Answers 2

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related