London 7- Somayeh Karimi

I.pass-tests/01-add-one/add-one.js

@@ -1 +1,3 @@
-module.exports = function(numbers) {};
+module.exports = function(numbers) {
+  return  numbers.map((number)=>number+1)
+};

I.pass-tests/02-get-word-lengths/get-word-lengths.js

@@ -1,3 +1,5 @@
-var getWordLengths = function(someWords) {};
+var getWordLengths = function(someWords) {
+ return   someWords.map(word=>word.length)
+};
 
 module.exports = getWordLengths;

I.pass-tests/03-sum-numbers/add-numbers.js

@@ -1,2 +1,6 @@
-function addNumbers(numbers) {}
+function addNumbers(numbers) {
+
+return  numbers.reduce((a,b) => a+b);
+
+}
 module.exports = addNumbers;

I.pass-tests/04-find-needle/find-needle.js

@@ -1,3 +1,5 @@
-function findNeedle(words) {}
+function findNeedle(words,key) {
+  return  words.indexOf(key)
+}
 
 module.exports = findNeedle;

I.pass-tests/05-factorial/factorial.js

@@ -8,6 +8,9 @@
 // calculate and return the factorial of int
 // note: factorial of 0 is 1
 
-function factorial(int) {}
+function factorial(int) {
+  return int === 0 ? 1 : int * factorial(int - 1);
+}
 
 module.exports = factorial;
+

I.pass-tests/06-remove-middle/remove-middle.js

@@ -0,0 +1,5 @@
+function removeMiddle(words) {
+  const index = Math.floor(words.length / 2);
+  return words.splice(index, 1);
+}
+module.exports = removeMiddle;

I.pass-tests/07-second-largest/second-largest.js

@@ -0,0 +1,4 @@
+function secondLargest(numbers) {
+ return numbers.sort((a, b) => b-a)[1];
+}
+module.exports = secondLargest;

I.pass-tests/08-get-average/get-average.js

@@ -1,3 +1,8 @@
 // the input is an array of numbers and strings
 // return the average of all the numbers
 // be sure to exclude the strings
+function average(array) {
+  const numbers = array.filter((ele) => typeof ele === "number");
+  return numbers.reduce((a, b) => a + b) / numbers.length;
+}
+module.exports = average;

I.pass-tests/09-car-sales/car-sales.js

@@ -0,0 +1,10 @@
+function sales(carsSold) {
+  let result = {};
+  carsSold.map((element) => {
+    if (result.hasOwnProperty(element.make)) {
+      result[element.make] = result[element.make] + element.price;
+    } else result[element.make] = element.price;
+  });
+  return result;
+}
+module.exports = sales;

I.pass-tests/10-paint-ford/paint-cars.js

@@ -0,0 +1,11 @@
+function paintShop(cars, newColour) {
+    var carArr = JSON.parse(JSON.stringify(cars));
+  if (newColour) {
+    carArr.map((car) => {
+      car.colour = car.colour === "Red" ? newColour : car.colour;
+    });
+  }
+
+  return carArr;
+}
+module.exports = paintShop;

I.pass-tests/11-cities-formatter/cities.js

@@ -0,0 +1,6 @@
+function formatCities(capitals, transform){
+    let result=[];
+capitals.map((capital) => result.push(`${capital.city} is the capital of ${capital.country}`));
+return result;
+}
+module.exports=formatCities;

I.pass-tests/ES-6-practice/es6.test.js

@@ -4,7 +4,7 @@ const {
   combineArrays,
   destructuring,
   templateString
-} = require("./index");
+} = require("./es6");
 
 test("function arrow is instance of a function", () => {
   expect(arrow).toBeInstanceOf(Function);