Solutions to the exercices

02_repeatString/repeatString.js

@@ -1,6 +1,8 @@
-const repeatString = function() {
+const repeatString = function(stringName, numberOfRepetitions) {
+    return stringName.repeat(numberOfRepetitions)
       
-};
+  
+  };
 
 // Do not edit below this line
 module.exports = repeatString;

03_reverseString/reverseString.js

@@ -1,6 +1,14 @@
-const reverseString = function() {
+const reverseString = function(stringToBeReversed) {
+    let reversedStringArray = [stringToBeReversed.split("")];
+    let reversedString = "";
+
+    for (let i = reversedStringArray[0].length-1; i >= 0; i--) {
+        reversedString += reversedStringArray[0][i];
+    }   
+    return reversedString;
+
+
 
 };
-
 // Do not edit below this line
 module.exports = reverseString;

04_removeFromArray/removeFromArray.js

@@ -1,6 +1,8 @@
-const removeFromArray = function() {
-
-};
+const removeFromArray = function(arrayValues, valuesToRemove) {
+    const index = arrayValues.indexOf(valuesToRemove);
+    arrayValues.splice(index, 1);
+      return arrayValues;
+  }
 
 // Do not edit below this line
 module.exports = removeFromArray;

05_sumAll/sumAll.js

@@ -1,4 +1,10 @@
-const sumAll = function() {
+const sumAll = function(a,b) {
+    let sumIntegers= a+b;
+    for (let i=a+1; i<b; i++){
+        sumIntegers += i;
+        
+    }
+    return sumIntegers;
 
 };
 

06_leapYears/leapYears.js

@@ -1,6 +1,15 @@
-const leapYears = function() {
-
+const leapYears = function(year) {
+    if (year % 4 === 0) {
+        if (year % 100 === 0) {
+            if (year % 400 === 0) {
+                return true;
+            } else {
+                return false;
+            }
+        } else {
+            return true;
+        }
+    }
 };
-
 // Do not edit below this line
 module.exports = leapYears;

07_tempConversion/tempConversion.js

@@ -1,9 +1,15 @@
-const convertToCelsius = function() {
+const convertToCelsius = function(degress) {
+  const degreesC= (degress-32)*5/9;
+  return Math.round(degreesC*10)/10;
+  
 };
 
-const convertToFahrenheit = function() {
+const convertToFahrenheit = function(degrees) {
+ const degreesF= (degrees*9/5)+32;
+  return Math.round(degreesF*10)/10;
 };
 
+
 // Do not edit below this line
 module.exports = {
   convertToCelsius,

08_calculator/calculator.js

@@ -1,25 +1,43 @@
-const add = function() {
-	
+const add = function(a,b) {
+	return a+b
 };
 
-const subtract = function() {
-	
+const subtract = function(a,b) {
+	return a-b
 };
 
 const sum = function() {
-	
+	let args=Array.isArray(arguments[0])?arguments[0]:Array.from(arguments)
+  let sum=0
+  for (let i=0;i<args.length;i++){
+    sum+=args[i]
+  } 
+  return sum
 };
 
 const multiply = function() {
+  let args=Array.isArray(arguments[0])?arguments[0]:Array.from(arguments)
+  let product=1
+  for (let i=0;i<args.length;i++){
+    product*=args[i]
+  }
+  return product
 
 };
 
 const power = function() {
+	let args=Array.from(arguments)
+  return Math.pow(args[0],args[1])
   
 };
 
 const factorial = function() {
-	
+  let args= Array.from(arguments)
+  let factorial= 1
+  for (let i=1;i<=args[0];i++){
+    factorial*=i
+  } 
+  return factorial
 };
 
 // Do not edit below this line

09_palindromes/palindromes.js

@@ -1,4 +1,12 @@
-const palindromes = function () {
+const palindromes = function (isPalindrome) {
+    let isPalindromeCleaned = isPalindrome.toLowerCase().replace(/[^a-z]/g, '')
+    let args = Array.isArray(isPalindromeCleaned[0]) ? isPalindromeCleaned[0] : Array.from(arguments)
+    let argsInverted=[]
+    for (let i=args.length-1;i>=0;i--){
+        argsInverted.push(args[i])
+        }
+        
+    return true ? args.join('')===argsInverted.join('') : false
 
 };
 

10_fibonacci/fibonacci.js

@@ -1,5 +1,10 @@
-const fibonacci = function() {
+const fibonacci = function(sequenceNumber) {
+    let sequence = [1, 1];
+    for (let i=1; i<=sequenceNumber; i++) {
+        sequence.push(sequence[i] + sequence[i-1]);
+    }
 
+    return sequence[sequenceNumber-1];
 };
 
 // Do not edit below this line

11_getTheTitles/getTheTitles.js

@@ -1,5 +1,5 @@
-const getTheTitles = function() {
-
+const getTheTitles = function(books) {
+    return books.map(book => book.title);
 };
 
 // Do not edit below this line

12_findTheOldest/findTheOldest.js

@@ -1,4 +1,17 @@
-const findTheOldest = function() {
+const findTheOldest = function(people) {
+    
+    function calculateAge(yearOfBirth, yearOfDeath){
+        if (yearOfDeath=== undefined){
+            yearOfDeath= new Date().getFullYear();
+
+        }
+        return yearOfDeath-yearOfBirth;
+    }
+
+    const ages= people.map(year => calculateAge(year.yearOfBirth, year.yearOfDeath));
+
+    const oldest= ages.indexOf(Math.max(...ages));
+    return people[oldest];
 
 };
 

LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2023 The Odin Project
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.