CODEWITHSUNDEEP
javascriptjsonfunctionobjectarguments
busyPixels
busyPixels

Reputation: 375

Convert JSON string to function parameters

I have a string of javascript objects that I need to convert to function arguments.

The string looks like this:

"{ "item1": "foo 1", "item2": "bar 1" }, { "item1": "foo 1", "item2": "bar 2" }"

I can concat "[ ]" and call JSON.parse to turn it into a valid array however, this does not solve my problem since the function needs them to be separate objects not an array of objects.

EX:

functionCall({ "item1": "foo 1", "item2": "bar 1" }, { "item1": "foo 1", "item2": "bar 2" });

I will never know how many objects will be in this string so I do not know how many arguments the function should accept either.

I would love to be able to add multiple objects to one variable like:

var objects = { "item1": "foo 1", "item2": "bar 1" }, { "item1": "foo 1", "item2": "bar 2" }

and then I could just call 

functionCall(objects);

Is there a way to accomplish something like this or another approach I can take?

Upvotes: 0

Views: 841

Answers (2)

Barmar
Barmar

Reputation: 780724

You can use Function.prototype.apply to convert an array into function arguments:

functionCall.apply(null, objects);

The initial null argument is the this argument for the function; if you're not calling an object method, it's not needed and null can be used as a placeholder.

Upvotes: 1

Sumner Evans
Sumner Evans

Reputation: 9157

You can use Function.prototype.apply():

functionCall.apply(window, objects);

(Replace window with whatever scope you'd like the function to have.)

The second argument is an array of objects, so go ahead and put the objects in an array and then use apply.

Upvotes: 1

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