The .each() method is useful when you need to loop through a collection of elements and perform a specific action on each one. It is the go-to method for simple iteration tasks and can be used with both arrays and objects. The syntax is straightforward and easy to understand, making it a great choice for beginners.
On the other hand, the .map() method is more powerful and flexible. It allows you to transform a collection of elements into a new array with modified values. This is particularly useful when you need to extract specific data or perform complex calculations on the original data set. However, because it returns a new array, it can be slower and more memory-intensive than .each().
When deciding between .map() and .each(), consider the nature of your data and what you need to accomplish with it. If you simply need to loop through a collection and perform a simple action on each element, .each() is likely the best choice. If you need to extract or transform data, .map() offers more flexibility and power.