Final Assessment Solutions

problems/countNumbers.js

@@ -12,8 +12,21 @@
  * returns { 99: 2, 11: 1, 12: 1, 13: 1, 58: 1 }
  */
 
-function countNumbers() {
-
+function countNumbers(arr) {
+    let object = {}
+    arr.forEach((elem) => {
+        if(object[elem]) {
+            return object[elem] = object[elem] +1
+        }
+        return object[elem] = 1
+    })
+    return object
+
+    // let object = arr.map((c) => {
+    //     for (let i = 0; i< arr.length; i++){   
+    //     }
+    // })
+    // return object
 }
 
 

problems/getCountriesSortedByPopulation.js

@@ -10,8 +10,14 @@
 * 
 */
 
-function getCountriesSortedByPopulation() {
-
+function getCountriesSortedByPopulation(arr) {
+    let sorted = arr.sort((current,next) => {
+        return next.population - current.population
+    }).map ((elem) => {
+        return elem.country
+    })
+    return sorted
+
 }
 
 module.exports = getCountriesSortedByPopulation

problems/isOdd.js

@@ -9,8 +9,13 @@
 * ex: isOdd(75); // true
 */
 
-function isOdd() {
-
+function isOdd(n) {
+    if (n % 2 !== 0) {
+            return true
+        } else {
+                return false
+            }
+    // n % 2 !== 0 ? "true" : "false"
 }
 
 module.exports = isOdd

problems/numberOfDigits.js

@@ -7,8 +7,11 @@
 
 */
 
-function numberOfDigits() {
-
+function numberOfDigits(n) {
+    return n.toString().length
+    // if (typeof n === "number") {
+    //     return n.length
+    // }
 }
 
 module.exports = numberOfDigits

problems/removeEvenStrings.js

@@ -19,8 +19,10 @@
 * returns: []
 */
 
-function removeEvenStrings() {
-
+function removeEvenStrings(arr) {
+    return arr.filter (elem => elem.length % 2 === 1)
+    // let newArray = arr.filter((elem) => elem.length % 2 === 1)
+    // return newArray   
 }
 
 module.exports = removeEvenStrings

problems/removeNumbersAtOddIndices.js

@@ -10,8 +10,20 @@
 * ex: removeNumbersAtOddIndices([5, 4, 3, 2, 1]);
 * returns: [5, 3, 1]
 */
-function removeNumbersAtOddIndices() {
+function removeNumbersAtOddIndices(arr) {
+    let newArray =[]
+    for(let i = 0; i < arr.length; i += 2){
+        newArray.push(arr[i])
+    }
+    return newArray
 
+    // let newArray = []
+    // for(let i = 0; i < arr.length; i++){
+    //     if(arr[i] % 2 !== 0) {
+    //         newArray.push(arr[i])
+    //     }
+    // }
+    // return newArray
 }
 
 module.exports = removeNumbersAtOddIndices

problems/removeOddNumbers.js

@@ -14,8 +14,10 @@
 * ex: removeOddNumbers([2, 4, 6])
 * returns: [2, 4, 6]
 */
-function removeOddNumbers() {
-
+function removeOddNumbers(arr) {
+    return arr.filter(elem => elem % 2 === 0)
+    // let newArray = arr.filter ((elem) => elem % 2 === 0)
+    // return newArray
 }
 
 module.exports = removeOddNumbers

problems/removeVowels.js

@@ -14,8 +14,17 @@
 *
 */
 
-function removeVowels() {
-
+function removeVowels(str) {
+    let lowerCase = str.toLowerCase()
+    let newStr = ""
+    for(let i = 0; i < lowerCase.length; i++) {
+        if(lowerCase[i] === "a" ||lowerCase[i] === "e" || lowerCase[i] === "i" || lowerCase[i] === "o" || lowerCase[i] === "u") {
+            newStr = newStr + ""
+        } else {
+            newStr = newStr + str[i]
+        }
+    }
+    return newStr
 }
 
 module.exports = removeVowels

problems/sevenBoom.js

@@ -11,8 +11,19 @@
 * 17 is also replaced with 'BOOM' because it contains a 7.
 */
 
-function sevenBoom() {
+function sevenBoom(n) {
+    // let newArray = n.filter ((elem) => typeof elem === "number" && elem % 7 === 0 && elem.toString().includes(7))
+    // return newArray
 
+    let newArray = []
+    for (let i = 1; i <= n; i++){
+        if(i % 10 === 7 || i % 7 === 0 ) {
+            newArray.push("BOOM")
+        } else {
+            newArray.push(i)
+        }
+    }
+    return newArray
 }
 
 module.exports = sevenBoom

problems/smallest.js

@@ -14,8 +14,16 @@
 * returns 1 (does not matter if it is the first or second 1)
 */
 
-function smallest() {
-
+function smallest(arr) {
+    let smallestNum = arr[0]
+    for (let i = 0; i < arr.length; i ++){
+        if(arr[i] < smallestNum) {
+            smallestNum = arr[i]
+        }
+    }
+    return smallestNum
 }
 
+console.log(smallest[1,2,3,4,5,1])
+
 module.exports = smallest