Geormary's complete assessment

problems/countNumbers.js

@@ -11,10 +11,22 @@
  * ex: countNumbers([99, 99, 11, 12, 13, 58])
  * returns { 99: 2, 11: 1, 12: 1, 13: 1, 58: 1 }
  */
-
-function countNumbers() {
-
+//create an object that stores the numbers in an array as keys and the amount of times it appaears in the array as values 
+// iterate through the array and if element has been seen before +1 on the value
+// if not see before the value = 1 
+function countNumbers(arr) {
+let obj = {}
+for(let num of arr){
+    if(obj[num]){
+        obj[num] += 1
+    } else if(obj[num] === undefined){
+        obj[num] = 1
+    }
+}
+return obj 
 }
 
+console.log(countNumbers([1, 2, 3, 4, 5, 6]))
+
 
 module.exports = countNumbers

problems/getCountriesSortedByPopulation.js

@@ -10,8 +10,15 @@
 * 
 */
 
-function getCountriesSortedByPopulation() {
+function getCountriesSortedByPopulation(arr) {
+let sort = arr.sort((pop1, pop2)=>{
+    return pop2.population - pop1.population 
 
+})
+let sorted = sort.map((el)=> {
+    return el.country
+})
+return sorted 
 }
-
+console.log(getCountriesSortedByPopulation([ { country: "Denmark", population: 6 }, { country: "China", population: 1386 }, { country: "Egypt", population: 145 }]))
 module.exports = getCountriesSortedByPopulation

problems/isOdd.js

@@ -9,7 +9,8 @@
 * ex: isOdd(75); // true
 */
 
-function isOdd() {
+function isOdd(n) {
+    return (n%2===1) ? true : false 
 
 }
 

problems/numberOfDigits.js

@@ -6,9 +6,17 @@
 * @returns {number} - Returns how many digits are in the input.
 
 */
-
-function numberOfDigits() {
-
+// convert n into something I can iterate over
+//toString is easier for me than array
+function numberOfDigits(n) {
+  let count = 0;
+  let string = n.toString();
+  for (let num of string) {
+    if (num) {
+      count += 1;
+    }
+  }
+  return count;
 }
 
-module.exports = numberOfDigits
+module.exports = numberOfDigits;

problems/removeEvenStrings.js

@@ -18,8 +18,10 @@
 * ex: removeEvenStrings([])
 * returns: []
 */
+//returns new arr either create variable or use .map or .filter
 
-function removeEvenStrings() {
+function removeEvenStrings(arr) {
+    return arr.filter((el)=> el.length%2===1)
 
 }
 

problems/removeNumbersAtOddIndices.js

@@ -10,7 +10,10 @@
 * ex: removeNumbersAtOddIndices([5, 4, 3, 2, 1]);
 * returns: [5, 3, 1]
 */
-function removeNumbersAtOddIndices() {
+// new array 
+//
+function removeNumbersAtOddIndices(arr) {
+return arr.map((el, i, array)=> i % 2 === 1)
 
 }
 

problems/removeOddNumbers.js

@@ -14,7 +14,8 @@
 * ex: removeOddNumbers([2, 4, 6])
 * returns: [2, 4, 6]
 */
-function removeOddNumbers() {
+function removeOddNumbers(arr) {
+    return arr.filter((el)=> el % 2 === 0)
 
 }
 

problems/removeVowels.js

@@ -14,8 +14,19 @@
 *
 */
 
-function removeVowels() {
+function removeVowels(str) {
+let newStr = ""
+let vowels = ['a','e','i','o','u','A', 'E', 'I', 'O', 'U']
+for(let i = 0; i < str.length; i++){
+    if(!vowels.includes(str[i])){
+       newStr += str[i]
+}
+}
+return newStr
 
 }
 
+console.log(removeVowels("hello"))
+console.log(removeVowels("HELLO"))
+
 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 arr = []
+for(let i = 1; i <= n; i++){
+if(i % 7 === 0){
+    arr.push('BOOM')
 
+}else if(i %10 === 7){
+    arr.push('BOOM')
+}else if(i){
+    arr.push(i)
+}    
 }
-
+return arr
+}
+console.log(sevenBoom(271))
 module.exports = sevenBoom

problems/smallest.js

@@ -14,8 +14,10 @@
 * returns 1 (does not matter if it is the first or second 1)
 */
 
-function smallest() {
+function smallest(arr) {
+let sorted = arr.sort((el1, el2) => el1 - el2)
+return sorted[0]
 
 }
-
+console.log(smallest([-3,3, 0]))
 module.exports = smallest