Module 1 - Final Assessment

problems/countNumbers.js

@@ -12,9 +12,17 @@
  * returns { 99: 2, 11: 1, 12: 1, 13: 1, 58: 1 }
  */
 
-function countNumbers() {
-
+function countNumbers(arr) {
+    let count = {}    
+    for (let i = 0; i < arr.length; i++) {
+        let num = arr[i]
+    count[num] = count[num] ? count[num] + 1 : 1
+    }
+    return count
 }
 
+let arr = [99, 99, 11, 12, 13, 58]
+console.log(countNumbers(arr))
+
 
 module.exports = countNumbers

problems/getCountriesSortedByPopulation.js

@@ -10,8 +10,35 @@
 * 
 */
 
-function getCountriesSortedByPopulation() {
-
+function getCountriesSortedByPopulation(arr) {
+ return arr.sort((a, b) => 
+ b.population - a.population).map(str => str.country)
 }
 
-module.exports = getCountriesSortedByPopulation
+// let arr = [51, 10, 12];
+
+ arr = [
+    {
+      country: "Algeria",
+      population: 41,
+    },
+    {
+      country: "Belize",
+      population: 0.4,
+    },
+    {
+      country: "China",
+      population: 1386,
+    },
+    {
+      country: "Denmark",
+      population: 6,
+    },
+  ]
+
+console.log(getCountriesSortedByPopulation(arr))
+
+// console.log(arr)
+
+
+module.exports = getCountriesSortedByPopulation

problems/isOdd.js

@@ -9,8 +9,14 @@
 * ex: isOdd(75); // true
 */
 
-function isOdd() {
-
+function isOdd(n) {
+    if(n % 2 !== 0){
+        return true
+    } else {
+        return false
+    }
 }
 
+console.log(isOdd(4))
+
 module.exports = isOdd

problems/numberOfDigits.js

@@ -7,8 +7,11 @@
 
 */
 
-function numberOfDigits() {
-
+function numberOfDigits(n) {
+    return n.toString().length 
 }
 
+let n = 123456789
+console.log(numberOfDigits(n))
+
 module.exports = numberOfDigits

problems/removeEvenStrings.js

@@ -19,8 +19,26 @@
 * returns: []
 */
 
-function removeEvenStrings() {
-
+function removeEvenStrings(arr) {
+return arr.filter(str => str.length % 2 === 1)
 }
 
+let arr = ([
+    "The",
+    "only",
+    "thing",
+    "we",
+    "have",
+    "to",
+    "fear",
+    "is",
+    "fear",
+    "itself",
+  ])
+
+
+// console.log(arr[0].length)
+
+console.log(removeEvenStrings(arr))
+
 module.exports = removeEvenStrings

problems/removeNumbersAtOddIndices.js

@@ -10,8 +10,16 @@
 * ex: removeNumbersAtOddIndices([5, 4, 3, 2, 1]);
 * returns: [5, 3, 1]
 */
-function removeNumbersAtOddIndices() {
-
+function removeNumbersAtOddIndices(arr) {
+for (let i = 0; i < arr.length; i++){
+    arr.splice(i + 1, 1)
+    }
+    return arr;
 }
 
+
+arr = [0, 1, 2, 3, 4]
+
+console.log(removeNumbersAtOddIndices(arr))
+
 module.exports = removeNumbersAtOddIndices

problems/removeOddNumbers.js

@@ -14,8 +14,13 @@
 * ex: removeOddNumbers([2, 4, 6])
 * returns: [2, 4, 6]
 */
-function removeOddNumbers() {
-
+function removeOddNumbers(arr) {
+    let evens = arr.filter ((num) => {
+        if(num % 2 === 0){
+            return true
+        }
+    })
+    return evens
 }
 
 module.exports = removeOddNumbers

problems/removeVowels.js

@@ -14,8 +14,9 @@
 *
 */
 
-function removeVowels() {
-
+function removeVowels(str) {
+    str = str.replace( /[aeiou]/ig, '' )
+    return str
 }
 
 module.exports = removeVowels

problems/sevenBoom.js

@@ -11,8 +11,12 @@
 * 17 is also replaced with 'BOOM' because it contains a 7.
 */
 
-function sevenBoom() {
-
-}
+function sevenBoom(n) {
+        let arr = []
+        for(let i = 1; i <= n; i++){
+            i % 7 === 0 || i % 10 === 7 ? arr.push("BOOM") : arr.push(i)
+        }
+        return arr
+    }
 
 module.exports = sevenBoom

problems/smallest.js

@@ -14,8 +14,9 @@
 * returns 1 (does not matter if it is the first or second 1)
 */
 
-function smallest() {
-
+function smallest(arr) {
+arr.sort(function(a, b){return a-b})
+    return arr[0]
 }
 
 module.exports = smallest