Question

I know about call and apply in javascript and are able to apply them to simple functions, but I get completely confused when it comes to applying them to a chained method call as the one shown below:

db.collection("posts").find({}, {limit:10, sort:[['views', -1]]}).toArray(function(err, posts) {
   console.log(posts)
});

Is it possible to pass the arguments from an array, something like [{}, {limit:10, sort:[['views', -1]]} ] into the above method using call or apply ?

I would like to use this to easily access & modify the arguments by keeping them in an external array.

Thank you

Answer 1

I don’t think there’s any way to keep the chaining. You’ll need to store the intermediate result.

var posts = db.collection("posts");
posts
    .find.apply(posts, argsarray)
    .toArray(function(err, posts) {
        console.log(posts)
    });