How to return multiple values from a function in JavaScript
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Functions return only one value. How can we simulate returning multiple values from a function?
When we call a function in JavaScript, we can only return one value using the return
statement:
const getAge = () => {
return 37
}
const getName = () => {
return 'Flavio'
}
How can we return multiple values from a function?
One easy trick is to return an array
const getDetails = () => {
return [37, 'Flavio']
}
This is fine, and we can get the values in this way thanks to array destructuring:
const [age, name] = getDetails()
Now we have the age
and name
variables that contain those values.
Note that the order we define those in const [age, name] = getDetails()
matters.
We can also return an object and use object destructuring:
const getDetails = () => {
return {
age: 37,
name: 'Flavio'
}
}
const { age, name } = getDetails()
In this case, the order of age
and name
in const { age, name } = getDetails()
does not matter any more, because those are named parameters.
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