Is there any way to use this when the callback isn't the last argument?

[zeroasterisk]

I've read through the README, and this discovermeteor post, and the wrapAsync docs in Meteor core.

It works fine, when the "next" argument is the callback...

But take a look at this NPM method I'm trying to wrap:
https://github.com/moshen/node-googlemaps/blob/master/lib/googlemaps.js#L153

when I only pass in the origin and destination arguments, it works fine... when I do any others, it fails because the wrapAsync doesn't know where to pass in the callback.

Suggestions?

[zeroasterisk]

FYI - here is my code and my failing unit test

[arunoda]

Check the runAsync api:
https://github.com/meteorhacks/meteor-async#asyncrunsyncfunction

On Thursday, October 2, 2014, alan blount [email protected] wrote:

I've read through the README, and this discovermeteor post
https://www.discovermeteor.com/blog/wrapping-npm-packages/, and the
wrapAsync http://docs.meteor.com/#meteor_wrapasync docs in Meteor core.

It works fine, when the "next" argument is the callback...

But take a look at this NPM method I'm trying to wrap:

https://github.com/moshen/node-googlemaps/blob/master/lib/googlemaps.js#L153

when I only pass in the origin and destination arguments, it works
fine... when I do any others, it fails because the wrapAsync doesn't know
where to pass in the callback.

Suggestions?

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Arunoda Susiripala
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[thani-sh]

You can also do something like this.

var wrappedFn = Meteor.wrapAsync(function (args, callback) {
    // add callback at index 2
    params.splice(2, 0, callback);
    originalFunction.apply(this, args);
})

wrappedFn([origin, destination, sensor, ...], callback)

(I didn't test this code, just wrote it here on github)

[thani-sh]

@arunoda how about a third options argument to let users set the index of callback function? https://github.com/meteorhacks/meteor-async/blob/master/async.js#L31

[arunoda]

Thanish solution works.
But the third arg option is too much for a general purpose api.

Above api is having some bad design. So we don't need to optimize for that.

On Thursday, October 2, 2014, Muhammed Thanish [email protected]
wrote:

@arunoda https://github.com/arunoda how about a third options argument
to let users set the index of callback function?
https://github.com/meteorhacks/meteor-async/blob/master/async.js#L31

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Arunoda Susiripala

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