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How can JavaScript replicate the unpacking feature found in Python?

asked 2022-03-04 11:00:00 +0000

qstack gravatar image

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answered 2021-07-29 03:00:00 +0000

djk gravatar image

JavaScript does not have a built-in unpacking feature like Python, but you can use a combination of destructuring and the spread operator to achieve a similar result.

For example, in Python, you can easily unpack a list or tuple into individual variables like this:

x, y, z = [1, 2, 3]

In JavaScript, you can use destructuring to assign values from an array to individual variables:

let [x, y, z] = [1, 2, 3];

However, if you want to unpack an array into individual variables and assign them to a function, you can use the spread operator as follows:

let arr = [1, 2, 3];
function myFunction(x, y, z) {
  // do something
}
myFunction(...arr);

This way, each element in the array is spread out and assigned to the individual function parameters. This is similar to how the unpacking feature works in Python.

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Asked: 2022-03-04 11:00:00 +0000

Seen: 8 times

Last updated: Jul 29 '21