![]() Encourages cleaner separation of concerns.Elimination of the use of mutable data structures and variables which leave room for unintended side effects.However there are some advantages to using Map / Reduce over these imperative techniques: Its possible to achieve the transformations I mentioned above with traditional imperative techniques, largely involving for loops and mutable data structures. A large portion of the rest of this blogpost are examples of variations on these two themes. Likewise, I use the reduce function if I find it necessary to take an array of objects and boil it down to a non-array structure (either a primitive or some JSON object). Generally speaking, I turn to the map function if I need to transform some Array of one object type into another Array of a different object type. I'd like to share some of the common map and reduce patterns I've come to use frequently in this blogpost, contrasting these techniques with the corresponding traditional imperative approach. sort etc) and ES6 have made my code more expressive and easier to understand. These functions (in conjunction with other classic favorites such as. In particular I've discovered the joy of using Map and Reduce. Over the past couple of months I've started to become a little bit more serious in applying functional programming techniques to my favorite client side language, JavaScript. ![]()
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