Final

problems/countNumbers.js

@@ -12,8 +12,16 @@
  * 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++) {
+    if(count[arr[i]] === undefined) {
+        count[arr[i]] = 1;
+    } else {
+        count[arr[i]] +=1;
+    }
+}
+ return count
 }
 
 

problems/getCountriesSortedByPopulation.js

@@ -10,8 +10,13 @@
 * 
 */
 
-function getCountriesSortedByPopulation() {
-
+function getCountriesSortedByPopulation(arr) {
+    let newArr = []
+    arr.sort((a,b) => b.population - a.population)
+    for(let i =0; i<arr.length; i++) {
+        newArr.push(arr[i].country)
+    }
+ return newArr
 }
 
 module.exports = getCountriesSortedByPopulation

problems/isOdd.js

@@ -9,8 +9,8 @@
 * ex: isOdd(75); // true
 */
 
-function isOdd() {
-
+function isOdd(n) {
+return n % 2 ===1 ? true : false
 }
 
 module.exports = isOdd

problems/numberOfDigits.js

@@ -7,8 +7,9 @@
 
 */
 
-function numberOfDigits() {
-
+function numberOfDigits(n) {
+let str = n.toString()
+return str.length
 }
 
 module.exports = numberOfDigits

problems/removeEvenStrings.js

@@ -19,8 +19,14 @@
 * returns: []
 */
 
-function removeEvenStrings() {
-
+function removeEvenStrings(arr) {
+let newArr = []
+for(let i = 0; i < arr.length; i ++) {
+    if(arr[i].length % 2 !==0) {
+        newArr.push(arr[i])
+    }
+}
+return newArr
 }
 
 module.exports = removeEvenStrings

problems/removeNumbersAtOddIndices.js

@@ -10,8 +10,13 @@
 * 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 +14,16 @@
 * ex: removeOddNumbers([2, 4, 6])
 * returns: [2, 4, 6]
 */
-function removeOddNumbers() {
-
+function removeOddNumbers(arr) {
+let newArr = []
+for(let i =0; i < arr.length; i++) {
+    if(arr[i] % 2 === 0) {
+    newArr.push(arr[i])
+    } else {
+
+    }
+}
+return newArr
 }
 
 module.exports = removeOddNumbers

problems/removeVowels.js

@@ -14,8 +14,28 @@
 *
 */
 
-function removeVowels() {
+function removeVowels(str) {
+let newStr = ''
+for(let i = 0; i < str.length; i++) {
+    if(str[i].toLowerCase() !== "a" && str[i].toLowerCase() !== "e" && str[i].toLowerCase() !== "i" && str[i].toLowerCase() !== "o" && str[i].toLowerCase() !== "u") {
+    newStr += str[i]
+}
 
 }
+return newStr
+}
+
+// let vowels = ["a", "e", "i", "o", "u"]
+// let newStr = "";
+// for(let i = 0; i < str.length; i++) {
+//     let letter =str[i].toUpperCase
+//     if(!vowels.includes(letter)) {
+//         newStr += str[i];
+//     } else {
+//         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 num= []
+for (i=1; i<= n; i++) {
+    if (i % 7 === 0 || i % 10 === 7 ) {
+        num.push("BOOM")
+    } else {
+        num.push(i)
+    }
 
 }
+return num
+}
 
 module.exports = sevenBoom

problems/smallest.js

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