CODEWITHSUNDEEP
javascriptasynchronousreturn
Matteo Pagliazzi
Matteo Pagliazzi

Reputation: 5260

return value asynchronous method

I have a method that passed an array of object call on each object an asynchronous method:

function method(objs){
  for(obj in objs){
    obj.asyncMethod()
  }
}

I have this idea that every function should return a value, but in this case the value should be based on the result of the async method so it's quite impossible.

is it a bad practic not to return a value (especially in library)?

if yes, there are solutions?

Upvotes: 1

Views: 490

Answers (2)

natlee75
natlee75

Reputation: 5197

A function should only return a value if it needs to return a value. There is absolutely nothing wrong with writing a function that does not return anything.

To answer your other question: no, there is no solution to this since inherently the method function will return before the asynchronous methods execute.

What would you even return? The code will go through n iterations in that for loop so how would you know which one to even return?

Upvotes: 2

Bjorn
Bjorn

Reputation: 71810

It is not bad practice to not return a value for async operations, it is expected. Accept a callback function as argument. There are quite a few built in and external libraries in node.js that have methods which accept callbacks as arguments.

Upvotes: 2

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