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Difference 3: Let rest be your preference But you can use the rest parameter within all functions - including the arrow function.
![javascript operators javascript operators](https://jogendras.files.wordpress.com/2017/07/logicaloperators1.png)
The arguments object is not available within an arrow function, so you can’t use it there. Difference 2: You cannot use the arguments object in an arrow function But you cannot do the same on the arguments object. So for instance, you can call the sort(), map(), forEach(), or pop() method on a rest parameter. As such, you can use all array methods on it. The rest parameter, however, is a real array object. Instead, it is an array-like object that does not have the comprehensive features of a regular JavaScript array. Keep in mind that the JavaScript arguments object is not a real array. Here are some of the differences between JavaScript arguments and the rest parameter: Difference 1: The arguments object is an array-like object - not a real array! Arguments vs Rest Parameters: What’s the Difference? However, if you use rest in a destructuring array or function, the operator will yield an array literal.īefore we wrap up our discussion on rest, you should be aware of some differences between JavaScript arguments and the rest parameter. In other words, whenever you use rest in a destructuring object, the rest operator will produce a properties object. In the snippet above, notice that the rest operator assigned a properties object - not an array - to the otherInfo variable.
JAVASCRIPT OPERATORS CODE
But the spread syntax expands iterables into individual elements.įor instance, consider this code that uses rest to enclose some values into an array: // Use rest to enclose the rest of specific user-supplied values into an array:įunction myBio(firstName, lastName. The main difference between rest and spread is that the rest operator puts the rest of some specific user-supplied values into a JavaScript array. But these two operators are not the same. ) for both the rest and spread operators.