First commit. Wanted to commit the passing minimum of 7/10 before tak…

problems/countNumbers.js

@@ -12,9 +12,17 @@
  * returns { 99: 2, 11: 1, 12: 1, 13: 1, 58: 1 }
  */
 
-function countNumbers() {
-
+function countNumbers(arr) {
+    newObj = {}
+    for (let element of arr) {
+        newObj[element] = 0
+    }
+    for (element of arr) {
+        newObj[element]++
+    }
+    return newObj
 }
 
+console.log(countNumbers([1, 2, 3, 4, 5, 6]))
 
 module.exports = countNumbers

problems/getCountriesSortedByPopulation.js

@@ -10,8 +10,40 @@
 * 
 */
 
-function getCountriesSortedByPopulation() {
-
+// takes in an array with objects holding a country as key and it's population number as value
+// need to return country names with lowest to highest population
+// will sort population number from highest to lowest
+// will access the property values with arr.country
+// 
+function getCountriesSortedByPopulation(arr) {
+  arr.sort((a, b) => {
+    return b.population - a.population
+  });
+  let arrCountries = []
+  for (let element of arr) {
+    arrCountries.push(element["country"])
+  }
+  return arrCountries
 }
+
+
+console.log(getCountriesSortedByPopulation([
+    {
+      country: "Algeria",
+      population: 41,
+    },
+    {
+      country: "Belize",
+      population: 0.4,
+    },
+    {
+      country: "China",
+      population: 1386,
+    },
+    {
+      country: "Denmark",
+      population: 6,
+    },
+  ]))
 
 module.exports = getCountriesSortedByPopulation

problems/isOdd.js

@@ -9,8 +9,17 @@
 * ex: isOdd(75); // true
 */
 
-function isOdd() {
-
+function isOdd(n) {
+    if (n % 2 === 1) {
+        return true
+    }
+    else {
+        return false
+    }
 }
 
+console.log(isOdd(3))
+console.log(isOdd(2))
+
+
 module.exports = isOdd

problems/numberOfDigits.js

@@ -7,8 +7,15 @@
 
 */
 
-function numberOfDigits() {
-
+function numberOfDigits(n) {
+    let digits = 0
+    let str = n.toString()
+    for (let element of str) {
+        digits++
+    }
+    return digits
 }
 
+console.log(numberOfDigits(2784))
+
 module.exports = numberOfDigits

problems/removeEvenStrings.js

@@ -19,8 +19,27 @@
 * returns: []
 */
 
-function removeEvenStrings() {
-
+function removeEvenStrings(arr) {
+    let newArr = []
+    for (let element of arr) {
+        if (element.length % 2 === 1) {
+            newArr.push(element)
+        }
+    }
+    return newArr
 }
 
+console.log(removeEvenStrings([
+    "The",
+    "only",
+    "thing",
+    "we",
+    "have",
+    "to",
+    "fear",
+    "is",
+    "fear",
+    "itself",
+  ]))
+
 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 i = 0
+    let newArr = []
+    while (i < arr.length) {
+        if (i % 2 === 0) {
+            newArr.push(arr[i])
+        }
+        i++
+    }
+    return newArr
 }
 
+console.log(removeNumbersAtOddIndices([1, 2, 3, 4, 5, 6]))
+console.log(removeNumbersAtOddIndices([1, 4, 7, 10]))
+
+
 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 of arr) {
+        if (i % 2 === 0) {
+            newArr.push(i)
+        }
+    }
+    return newArr
 }
 
+console.log(removeOddNumbers([1, 2, 3, 4, 5, 6, 7]))
+
 module.exports = removeOddNumbers

problems/removeVowels.js

@@ -14,8 +14,34 @@
 *
 */
 
-function removeVowels() {
+// will take in a string
+// will return a new string without the vowels
+// we do this by splitting the string into an array with str.split('')
+// we then iterate through the newArr
+// 
+function removeVowels(str) {
+    let vowel = "aeiou" + "aeiou".toUpperCase()
+    let newStr = str
+    let chars
 
+    for (let i = 0; i < vowel.length; i++) {
+        console.log(chars, newStr)
+        chars = newStr.split(vowel[i])
+        newStr = chars.join('')
+    }
+    return newStr
 }
 
+console.log(removeVowels("Hello kiddo"))
+
+// let yourName = 'Ivan'
+// yourName.split === String.prototype.split
+// true
+// yourName.prototype === String.prototype
+// false
+
+// String.prototype is the entire name of the object.
+// It has a bunch of methods, but no properties
+
+
 module.exports = removeVowels

problems/sevenBoom.js

@@ -11,8 +11,25 @@
 * 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++) {
+        if (i % 7 === 0) {
+            newArr.push("BOOM")
+        }
+        else if (i.toString().includes(7)) {
+            newArr.push("BOOM")
+        }
+        else {
+            newArr.push(i)
+        }
+    }
+
+    return newArr
 
 }
 
+console.log(sevenBoom(59))
+
 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 = Infinity
+    for (let element of arr) {
+        if (smallestNum > element) {
+            smallestNum = element
+        }
+    }
+    return smallestNum
 }
 
+console.log(smallest([-99, 99, 57, 3, 6, 32]))
+
 module.exports = smallest