Fix HOF answer

README.md

@@ -1474,15 +1474,17 @@ TODO
 
 ### What is the definition of a higher-order function?
 
-A higher-order function is any function that takes another function as a parameter, which it uses to operate on some data, or returns a function as a result. Higher-order functions are meant to abstract some operation that is performed repeatedly. The classic example of this is `map`, which takes an array and a function as arguments. `map` then uses this function to transform each item in the array, returning a new array with the transformed data. Other popular examples in JavaScript are `forEach`, `filter`, and `reduce`. A higher-order function doesn't just need to be manipulating arrays as there are many use cases for returning a function from another function. `Array.prototype.bind` is one such example in JavaScript.
+A higher-order function is any function that takes one or more functions as arguments, which it uses to operate on some data, and/or returns a function as a result. Higher-order functions are meant to abstract some operation that is performed repeatedly. The classic example of this is `map`, which takes an array and a function as arguments. `map` then uses this function to transform each item in the array, returning a new array with the transformed data. Other popular examples in JavaScript are `forEach`, `filter`, and `reduce`. A higher-order function doesn't just need to be manipulating arrays as there are many use cases for returning a function from another function. `Array.prototype.bind` is one such example in JavaScript.
 
 **Map**
 
-Let say we have an array of names which we need to transform each element to uppercase string.
+Let say we have an array of names which we need to transform each string to uppercase.
 
-`const names = ['irish', 'daisy', 'anna']`;
+```js
+const names = ['irish', 'daisy', 'anna'];
+```
 
-The imperative way will be like:
+The imperative way will be as such:
 
 ```js
 const transformNamesToUppercase = function(names) {
@@ -1495,7 +1497,7 @@ const transformNamesToUppercase = function(names) {
 transformNamesToUppercase(names); // ['IRISH', 'DAISY', 'ANNA']
 ```
 
-Use `.map(transformerFn)` makes it simpler, easy to reason about and declarative.
+Use `.map(transformerFn)` makes the code shorter and more declarative.
 
 ```js
 const transformNamesToUppercase = function(names) {