solved lab

src/functions-and-arrays.js

@@ -1,41 +1,125 @@
 // Iteration #1: Find the maximum
-function maxOfTwoNumbers() {}
+function maxOfTwoNumbers(num1,num2) {
+  if (num1>num2){
+      return(num1+ " is greater")
+  }
+    else if (num1<num2){
+        return (num2 +" is greater")
+    }
+    else{
+        return ("they are equal")
+    }
 
+}
+console.log(maxOfTwoNumbers(10,8))
 
 
 // Iteration #2: Find longest word
 const words = ['mystery', 'brother', 'aviator', 'crocodile', 'pearl', 'orchard', 'crackpot'];
+const empty = []
+function findLongestWord(arr) {
+    if(arr.length===0){
+            return null
+
+        }
+
+    let longest=arr[0]
+    for(let i=1;i<arr.length;i++){
+        if(arr[i].length>longest.length){
+            longest=arr[i]
+        }
+
+    }
+    return longest
+
+
+}
+console.log(findLongestWord(empty))
+console.log(findLongestWord(words))
 
-function findLongestWord() {}
 
 
 
 // Iteration #3: Calculate the sum
 const numbers = [6, 12, 1, 18, 13, 16, 2, 1, 8, 10];
 
-function sumNumbers() {}
+function sumNumbers(arr) {
+    let sum=0
+    for(let i=0; i<arr.length; i++){
+        sum+=arr[i]
+    }
+    return sum
+}
+console.log(sumNumbers([6, 12, 1, 18, 13, 16, 2, 1, 8, 10]))
+
 
 
 
 // Iteration #3.1 Bonus:
-function sum() {}
+const mixedArr = [6, 12, "miami", 1, true, "barca", "200", "lisboa", 8, 10];
+function sum(arr) {
+  let total = 0;
+
+  for (let i = 0; i < arr.length; i++) {
+    const element = arr[i]; 
+    if (typeof element === "number") {
+      total += element; 
+    } else if (typeof element === "string") {
+      total += element.length; 
+    } else if (typeof element === "boolean") {
+      total += element ? 1 : 0;
+    } else {
+      throw new Error("Unsupported data type in array");
+    }
+  }
+  return total; 
+}
+console.log(sum(mixedArr));
+
 
 
 
 // Iteration #4: Calculate the average
 // Level 1: Array of numbers
-const numbersAvg = [2, 6, 9, 10, 7, 4, 1, 9];
+const number= [2, 6, 9, 10, 7, 4, 1, 9];
 
-function averageNumbers() {}
+function averageNumbers(arr) {
+  if (arr.length === 0) return null; 
+  const sum = arr.reduce((acc, curr) => acc + curr, 0); 
+  return sum / arr.length; 
+}
+console.log(averageNumbers(number));
 
 
 // Level 2: Array of strings
 const wordsArr = ['seat', 'correspond', 'linen', 'motif', 'hole', 'smell', 'smart', 'chaos', 'fuel', 'palace'];
 
-function averageWordLength() { }
+function averageWordLength(arr) {
+  if (arr.length === 0) return null; 
+  const totalLength = arr.reduce((acc, curr) => acc + curr.length, 0); 
+  return totalLength / arr.length;
+ }
+ console.log(averageWordLength(words));
 
 // Bonus - Iteration #4.1
-function avg() {}
+function avg(arr) {
+  if (arr.length === 0) return null; 
+  const total = arr.reduce((acc, curr) => {
+    if (typeof curr === "number") {
+      return acc + curr; 
+    } else if (typeof curr === "string") {
+      return acc + curr.length; 
+    } else if (typeof curr === "boolean") {
+      return acc + (curr ? 1 : 0); 
+    } else {
+      throw new Error("Unsupported data type in array"); 
+    }
+  }, 0);
+
+  return total / arr.length; 
+}
+console.log(avg(mixedArr));
+
 
 // Iteration #5: Unique arrays
 const wordsUnique = [
@@ -52,14 +136,27 @@ const wordsUnique = [
   'bring'
 ];
 
-function uniquifyArray() {}
+function uniquifyArray(arr) { 
+  if (arr.length === 0) return null; 
+  return arr.filter((word, index) => arr.indexOf(word) === index);
+}
+console.log(uniquifyArray(words));
+
 
 
 
 // Iteration #6: Find elements
 const wordsFind = ['machine', 'subset', 'trouble', 'starting', 'matter', 'eating', 'truth', 'disobedience'];
 
-function doesWordExist() {}
+function doesWordExist(arr,word) {
+  if (arr.length === 0) return null; 
+  for (let i = 0; i < arr.length; i++) {
+    if (arr[i] === word) return true; 
+  }
+  return false; // Word does not exist
+}
+console.log(doesWordExist(words, 'truth')); 
+console.log(doesWordExist(words, 'hello')); 
 
 
 
@@ -78,7 +175,17 @@ const wordsCount = [
   'matter'
 ];
 
-function howManyTimes() {}
+function howManyTimes(arr,word) {
+  if (arr.length === 0) return 0; 
+  let count = 0;
+  for (let i = 0; i < arr.length; i++) {
+    if (arr[i] === word) count++; 
+  }
+  return count;
+}
+console.log(howManyTimes(words, 'matter')); 
+console.log(howManyTimes(words, 'truth'));  
+
 
 
 
@@ -106,7 +213,36 @@ const matrix = [
   [1, 70, 54, 71, 83, 51, 54, 69, 16, 92, 33, 48, 61, 43, 52, 1, 89, 19, 67, 48]
 ];
 
-function greatestProduct() {}
+function greatestProduct(matrix) {
+  let maxProduct = 0;
+
+  for (let row = 0; row < matrix.length; row++) {
+    for (let col = 0; col < matrix[row].length; col++) {
+
+      if (col + 3 < matrix[row].length) {
+        const horizontalProduct =
+          matrix[row][col] *
+          matrix[row][col + 1] *
+          matrix[row][col + 2] *
+          matrix[row][col + 3];
+        maxProduct = Math.max(maxProduct, horizontalProduct);
+      }
+
+      if (row + 3 < matrix.length) {
+        const verticalProduct =
+          matrix[row][col] *
+          matrix[row + 1][col] *
+          matrix[row + 2][col] *
+          matrix[row + 3][col];
+        maxProduct = Math.max(maxProduct, verticalProduct);
+      }
+    }
+  }
+
+  return maxProduct;
+}
+console.log(greatestProduct(matrix));
+