Tag: return

how do I return the whole object without seeing [object Object]?

This code updates the object properties and their values but when I try to return the object, I get [object Object] on my screen. How do I Return the whole object? Answer You have to create a string at some point. JSON.stringify(records) is the closest you will get to printing the object.

How to catch Firebase promise in React?

javascript promise react-native reactjs return

I have a simple function that checks if the user has Premium access or not: I tried to catch this in various ways, but no luck, it always returns an “undefined” object. What is the correct way to get the returned Boolean value? Answer onSnapshot is meant for listening to a collection continuously,…

Variable of function always returns undefined

javascript keytar node.js return

The idea: I want to return a variable from a function and then output it using console.log(). The problem: I can’t just use return result because then nothing is returned. I don`t really know how else to return the variable. I have already looked at SO posts like this one, however I probably lack suitab…

Undefined when i am returning an Object in Javascript

javascript return undefined vue.js vuex

I’m doing a getter in VueX, and when i’m returning an object for another function, i have “undefined”. Basically i have a function like that. When i’m showing obj with console.log(obj), i have an object with elements in here. And basically it’s working. But when i’m d…

How to return object from MongoDb database in findOne method

asynchronous javascript mongodb return

sorry if it’s easy mistake, I’ve not so much experience in JS, I’ve tried a lot of ways and I can’t resolve this problem. I can find and print my object from database, but I can’t return it to my main method. My main method (it’s in another file than methods to database): a…

Memory reference issue for function return (React Javascript)

function javascript memory reactjs return

So I am working in React.js. I need to generate three versions of the same list, but with a different set of markets contained inside of each of the three events. I expect the events to be the same. But when they are linked to the markets, each of the three same events might have a different sub-set of market…

What’s the performance difference between “skip if condition” and “directly return”?

execution-time if-statement javascript return

Is there any performance difference between the following 2 functions: Which one has a smaller execution time? Answer I don’t think there is a performance difference, but the second function is better for readability, because you don’t have to indent. Also you can use !a in the if statement in the…

Recursive function returns undefined

javascript recursion return

I have a function which calculates taxes. I can’t see why it doesn’t stop the recursion. Answer In this arm of your function: you are not returning a value from the function or setting returnTax. When you don’t return anything, the return value is undefined. Perhaps, you want this:

How to make chainable function in JavaScript?

chain chainable function javascript return

Lets imagine function like this: Usage of it would be like: I’m looking for a way to create function that’s chainable with other functions. Imagine usage: How would I do this? Answer Sure, the trick is to return the object once you’re done modifying it: http://jsfiddle.net/Xeon06/vyFek/ To m…

Why does a return in `finally` override `try`?

javascript return try-catch try-catch-finally try-finally

How does a return statement inside a try/catch block work? I’m expecting the output of this function to be true, but instead it is false! Answer Finally always executes. That’s what it’s for, which means its return value gets used in your case. You’ll want to change your code so it&#82…