Can you explain the differences between spread and rest operators in JavaScript?
Sure! The spread operator (...) is used to expand elements of an iterable (like an array) into individual elements, while the rest operator (...) collects multiple elements into a single array.
Can you give me an example of each?
Of course! For the spread operator, you can use it like this: const arr = [1, 2, 3]; const newArr = [...arr, 4, 5];
This results in newArr
being [1, 2, 3, 4, 5]
. For the rest operator, you might see it in a function like this: function myFunc(...args) { return args; }
Here, args
will be an array of all arguments passed to myFunc
.
What about other operators? How do they compare?
Other operators like the destructuring assignment allow you to unpack values from arrays or properties from objects. They serve different purposes but can be used in conjunction with spread and rest operators for more complex data manipulation.
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