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Understanding the Spread Operator(...) in JavaScript

Brandon Damue on February 02, 2023

In today's episode of talking about awesome JavaScript features, we are going to turn our attention to the Spread operator(...) or Spread syntax. A...
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Bruno •

Really great article, @brandonbawe!👏

I found it very nice that you gave a list of points where the spread operator is useful 👌

One thing I would add would be, in the Math functions section, that you can use the spread operator to pass array elements as arguments to a function in more use cases. One example would be calling a function with an array of arguments:

function sum(a, b, c, d) {
    return a + b + c + d;
}

let arr = [1, 2, 3, 4];
let result = sum(...arr);
console.log(result); // 10
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This is the same as if you would be calling the sum function with (1, 2, 3, 4) as “hardcoded” arguments.

Keep it up!🙌

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Brandon Damue •

Thank you for your input Bruno. It is highly appreciated.

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Brandon Damue •

Thank you for you review Abhay. The Spread operator is really an awesome feature that makes JavaScript more fun to work with.

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Maxi Contieri •

nice examples!

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Brandon Damue •

Thank you Maxi

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neu-ma-tic •

spread is good but i find does not work recursively. try lodash merge function

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Brandon Damue •

Okay I'm going to try that out. Thank you for your input.

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9opsec •

Good explanation of something that has been confusing for me!

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Munir Uddin Mahbub •

yes, It's Good for me , Thank you so much

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Brandon Damue •

You are welcome Munir.

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Munyaneza Armel •

Thank you for sharing

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Tejus Sahi •

That's Great Article, i learned something new about spread operator use case.
Math.min and Math.max i think its really useful.

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Brandon Damue •

Thank you for your review sir.