# Coaching - Methods 2 with Founders and Coders --- JavaScript Methods act like functions built into JavaScript. ---- Methods give us the ability to do complex things with relatively little code. --- ## Array Methods ---- We've seen some array methods already, like `join()` and `pop()`. ---- Some array methods allow us to alter *each* element within an array. ---- Can you think of some things we might like to do to each element in an array of numbers? ---- Can you think of some things we might like to do to each string in an array? --- ### `map()` ### :world_map: ---- Creates a new array with the result of calling a function for each array element ---- ```javascript= array.map(function(currentValue, index, arr){ // What your function does here }); ``` ---- [Replit](https://replit.com/@Albadylic/BarrenVerticalEngines#index.js) --- ### `filter()` :hourglass_flowing_sand: ---- Creates a new array with all the elements that fulfil a condition passed via a function. ---- ```javascript= array.filter(function(currentValue, index, arr)){ // Our condition here } ``` ---- [Replit](https://replit.com/@Albadylic/BarrenVerticalEngines#index.js) --- ### `reduce()` :deciduous_tree: :arrow_right: :seedling: ---- The reduce method converts the values in an array into a single value. ---- ```javascript= array.reduce(function(total, currentValue, currentIndex, arr), initialValue){ // Code to reduce the values } ``` ---- [Replit](https://replit.com/@Albadylic/BarrenVerticalEngines#index.js)