31.Javascript for..of loop vs for..in loop?
JavaScript provides two types of loops to iterate over collections or objects: the for..of loop and the for..in loop.
The for..of loop is used to iterate over iterable objects, such as arrays, strings, maps, and sets. It works by creating a loop that iterates through each item of the collection, and each iteration assigns the current item to a variable that can be used inside the loop body. This loop is useful when you need to loop through the values of a collection, as it provides a simpler syntax and better performance than other loop constructs.
On the other hand, the for..in loop is used to iterate over the properties of an object, such as its keys. It works by creating a loop that iterates through each property of the object, and each iteration assigns the current property to a variable that can be used inside the loop body. This loop is useful when you need to loop through the keys of an object, but it can have unexpected behavior if the object has properties inherited from its prototy
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