[BCN-FT-ANNAC] Disaster!

src/functions-and-arrays.js

@@ -1,6 +1,14 @@
 // Find the maximum
 
+/*function maxOfTwoNumbers(a, b) {
+  return Math.max(a, b);
+}*/
+
+var maxOfTwoNumbers = (a, b) =>
+  a > b ? a : b;
+
 // Finding Longest Word
+
 var words = [
   'mystery',
   'brother',
@@ -11,15 +19,52 @@ var words = [
   'crackpot'
 ];
 
+function findLongestWord(arr) {
+  var longest = arr[0];
+  for (var i = 1; i < arr.length; i++) {
+    var word = arr[i];
+    if (word.length > longest.length) {
+      longest = word;
+    }
+  }
+  return longest;
+}
+
+
 // Calculating a Sum
 
 var numbers = [6, 12, 1, 18, 13, 16, 2, 1, 8, 10];
 
+/*function sumArray(numbers) {
+  var sum = 0;
+  for (var i = 0; i < numbers.length; i++) {
+    sum += numbers[i];
+  }
+  return sum;
+}*/
+
+var sumArray = (numbers) => 
+  numbers.reduce(function(acc, number) {
+  return acc + number;
+}, 0);
+
+
 // Calculate the Average
 
 var numbersAvg = [2, 6, 9, 10, 7, 4, 1, 9];
 
+function averageNumbers(arr) {
+  if (arr.length === 0) {
+    return undefined;
+  }
+  var sum = sumArray(arr);
+  var average = sum / arr.length;
+  return average;
+}
+
+
 // Array of Strings
+
 var wordsArr = [
   'seat',
   'correspond',
@@ -33,7 +78,19 @@ var wordsArr = [
   'palace'
 ];
 
+function averageWordLength(arr) {
+  if (arr.length === 0) {
+    return undefined;
+  }
+  var sumOfCharacters = 0;
+  for (var i = 0; i < arr.length; i++) {
+    sumOfCharacters += arr[i].length;
+  }
+  return sumOfCharacters / arr.length;
+}
+
 // Unique Arrays
+
 var wordsUnique = [
   'crab',
   'poison',
@@ -48,7 +105,21 @@ var wordsUnique = [
   'bring'
 ];
 
+function uniquifyArray(arr) {
+  if (arr.length === 0) {
+    return undefined;
+  }
+  var filtered = [];
+  for (var i = 0; i < arr.length; i++) {
+    if (filtered.indexOf(arr[i]) === -1) {
+      filtered.push(arr[i]);
+    }
+  }
+  return filtered;
+}
+
 // Finding Elements
+
 var wordsFind = [
   'machine',
   'subset',
@@ -60,7 +131,19 @@ var wordsFind = [
   'disobedience'
 ];
 
+function doesWordExist(arr, word) {
+  var result = false;
+  for (var i = 0; i < arr.length; i++) {
+    if (arr[i] === word) {
+      var result = true;
+    }
+  }
+  return result;
+}
+
+
 // Counting Repetion
+
 var wordsCount = [
   'machine',
   'matter',
@@ -74,6 +157,21 @@ var wordsCount = [
   'disobedience',
   'matter'
 ];
+
+function howManyTimes(arr, word) {
+  var counter = 0;
+  if (arr.length === 0) {
+    return false;
+  }
+  for (var i = 0; i < arr.length; i++) {
+    if (arr[i] === word) {
+      counter++;
+    }
+  }
+  return counter;
+}
+
+
 // Bonus Quest
 
 var matrix = [
@@ -98,3 +196,55 @@ var matrix = [
   [20, 73, 35, 29, 78, 31, 90, 1, 74, 31, 49, 71, 48, 86, 81, 16, 23, 57, 5, 54],
   [1, 70, 54, 71, 83, 51, 54, 69, 16, 92, 33, 48, 61, 43, 52, 1, 89, 19, 67, 48]
 ];
+
+// function greatestProduct(matrix, adjacent) {
+//   var max = 0;
+
+//   var dx = [1, 0, 1,-1];
+//   var dy = [0, 1, 1, 1];
+
+//   for (var y = 0; y < matrix.length; y++) {
+//     for (var x = 0; x < matrix[y].length; x++) {
+//       for (var d = 0; d < 4; d++) {
+//         var p = 1;
+//         for (var i = 0; i < adjacent; i++) {
+//           p*= get(matrix, y + i * dy[d], x + i * dx[d]);
+//         }
+//         max = Math.max(p, max);
+//       }
+//     }
+//   }
+//   return max;
+// }
+// greatestProduct(matrix, 4);
+
+
+// via 2
+
+function greatestProduct(matrix) {
+  var horizontal, vertical, diagonal;
+  var greatProduct = 0;
+
+  for (var i=0, nRows = matrix.length; i < nRows - 1; i++) {
+    for (var j=0, nCols = matrix[0].length; j < nCols - 1; j++) {
+      // 4 horizontal elements
+      if (j < nCols-3) {
+        horizontal = matrix[i][j] * matrix[i][j+1] * matrix[i][j+2] * matrix[i][j+3];
+      }
+
+      // 4 vertical elements
+      if (i < nRows-3) {
+        vertical = matrix[i][j] * matrix[i+1][j] * matrix[i+2][j] * matrix[i+3][j];
+      }
+
+      // 4 Diagonal elements
+      if (i < nRows-3 && j < nCols-3) {
+        diagonal = matrix[i][j] * matrix[i+1][j+1] * matrix[i+2][j+2] * matrix[i+3][j+3];
+      }
+
+      greatProduct = Math.max(greatProduct, horizontal, vertical, diagonal);
+    }
+  }
+
+  return greatProduct;
+}

src/index.html

@@ -0,0 +1,17 @@
+<!doctype html>
+<html lang="en">
+
+<head>
+  <title>sthg</title>
+  <meta charset="utf-8">
+  <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
+  <script src="functions-and-arrays.js"></script>
+
+</head>
+
+<body>
+  <h1>sthg</h1>
+</body>
+</html>
+
+