diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/avoid-mutations-and-side-effects-using-functional-programming.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/avoid-mutations-and-side-effects-using-functional-programming.english.md
index 0b83fbcb70..0fb12bd216 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/avoid-mutations-and-side-effects-using-functional-programming.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/avoid-mutations-and-side-effects-using-functional-programming.english.md
@@ -63,6 +63,10 @@ console.log(fixedValue); // Should print 4
```js
-// solution required
+var fixedValue = 4
+
+function incrementer() {
+ return fixedValue + 1
+}
```
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/introduction-to-currying-and-partial-application.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/introduction-to-currying-and-partial-application.english.md
index 1959316689..68d679dd7d 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/introduction-to-currying-and-partial-application.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/introduction-to-currying-and-partial-application.english.md
@@ -9,7 +9,11 @@ challengeType: 1
The arity of a function is the number of arguments it requires. Currying a function means to convert a function of N arity into N functions of arity 1.
In other words, it restructures a function so it takes one argument, then returns another function that takes the next argument, and so on.
Here's an example:
-//Un-curried function
function unCurried(x, y) {
return x + y;
}
//Curried function
function curried(x) {
return function(y) {
return x + y;
}
}
curried(1)(2) // Returns 3
+//Un-curried function
function unCurried(x, y) {
return x + y;
}
//Curried function
function curried(x) {
return function(y) {
return x + y;
}
}
+
//Alternative using ES6
+
const curried = x => y => x + y
+
+
curried(1)(2) // Returns 3
This is useful in your program if you can't supply all the arguments to a function at one time. You can save each function call into a variable, which will hold the returned function reference that takes the next argument when it's available. Here's an example using the curried function in the example above:
// Call a curried function in parts:
var funcForY = curried(1);
console.log(funcForY(2)); // Prints 3
Similarly, partial application can be described as applying a few arguments to a function at a time and returning another function that is applied to more arguments.
@@ -65,6 +69,6 @@ add(10)(20)(30);
```js
-// solution required
+const add = x => y => z => x + y + z
```
diff --git a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/use-the-map-method-to-extract-data-from-an-array.english.md b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/use-the-map-method-to-extract-data-from-an-array.english.md
index 7c11fad8ba..6eaa784733 100644
--- a/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/use-the-map-method-to-extract-data-from-an-array.english.md
+++ b/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/use-the-map-method-to-extract-data-from-an-array.english.md
@@ -165,7 +165,7 @@ for(var i=0; i < watchList.length; i++){
// Add your code above this line
-console.log(rating);
+console.log(JSON.stringify(rating));
```
@@ -178,6 +178,11 @@ console.log(rating);
```js
-// solution required
+var rating = watchList.map(function(movie) {
+ return {
+ title: movie["Title"],
+ rating: movie["imdbRating"]
+ }
+})
```