completed final assessment

problems/countNumbers.js

@@ -12,8 +12,18 @@
  * returns { 99: 2, 11: 1, 12: 1, 13: 1, 58: 1 }
  */
 
-function countNumbers() {
-
+function countNumbers(arr) {
+    let obj = {}
+    for (let i = 0; i < arr.length; i += 1) {
+        let k = arr[i]
+        if (obj[k] === undefined) {
+            obj[k] = 1
+        }
+        else if (obj[k]){
+            obj[k] += 1
+        }
+    }
+    return obj
 }
 
 

problems/getCountriesSortedByPopulation.js

@@ -10,8 +10,11 @@
 * 
 */
 
-function getCountriesSortedByPopulation() {
-
+function getCountriesSortedByPopulation(arr) {
+    let newArr = []
+    let sorted = arr.sort((a, b) => b.population - a.population)
+    sorted.forEach(e => newArr.push(e.country))
+    return newArr
 }
 
 module.exports = getCountriesSortedByPopulation

problems/isOdd.js

@@ -9,8 +9,11 @@
 * ex: isOdd(75); // true
 */
 
-function isOdd() {
-
+function isOdd(n) {
+    if (n % 2 === 0) {
+        return false
+    }
+    return true
 }
 
 module.exports = isOdd

problems/numberOfDigits.js

@@ -7,8 +7,13 @@
 
 */
 
-function numberOfDigits() {
-
+function numberOfDigits(n) {
+    let count = 0
+    let num = n.toString()
+    for (let i of num) {
+        count += 1
+    }
+    return count
 }
 
 module.exports = numberOfDigits

problems/removeEvenStrings.js

@@ -19,8 +19,9 @@
 * returns: []
 */
 
-function removeEvenStrings() {
-
+function removeEvenStrings(arr) {
+    let filtered = arr.filter(i => i.length % 2 === 1)
+    return filtered
 }
 
 module.exports = removeEvenStrings

problems/removeNumbersAtOddIndices.js

@@ -10,8 +10,12 @@
 * ex: removeNumbersAtOddIndices([5, 4, 3, 2, 1]);
 * returns: [5, 3, 1]
 */
-function removeNumbersAtOddIndices() {
-
+function removeNumbersAtOddIndices(arr) {
+    let newArr = []
+    for (let i = 0; i < arr.length; i += 2) {
+        newArr.push(arr[i])
+    }
+    return newArr
 }
 
 module.exports = removeNumbersAtOddIndices

problems/removeOddNumbers.js

@@ -14,8 +14,9 @@
 * ex: removeOddNumbers([2, 4, 6])
 * returns: [2, 4, 6]
 */
-function removeOddNumbers() {
-
+function removeOddNumbers(arr) {
+    let filtered = arr.filter(e => e % 2 === 0)
+    return filtered
 }
 
 module.exports = removeOddNumbers

problems/removeVowels.js

@@ -14,8 +14,14 @@
 *
 */
 
-function removeVowels() {
-
+function removeVowels(str) {
+    let vowel = 'aeiouAEIOU'
+    let newStr = ''
+    for (let i = 0; i < str.length; i += 1) {
+        if (!vowel.includes(str[i])) {
+            newStr += str[i]
+        }
+    }
+    return newStr
 }
-
 module.exports = removeVowels

problems/sevenBoom.js

@@ -11,8 +11,17 @@
 * 17 is also replaced with 'BOOM' because it contains a 7.
 */
 
-function sevenBoom() {
-
+function sevenBoom(n) {
+    let newArr = []
+    for (let i = 1; i <= n; i += 1) {
+        if (i % 7 === 0 || i % 10 === 7) {
+            newArr.push('BOOM')
+        }
+        else {
+            newArr.push(i)
+        }
+    }
+    return newArr
 }
 
 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 smallest = arr.reduce((acc, el) => {
+      if (acc < el) {
+          return acc
+      }
+      else {
+          return el
+      }
+  })
+  return smallest
 }
 
 module.exports = smallest