Homework9

JavascriptTasks.js

@@ -0,0 +1,285 @@
+// Написать программу, которая будет проверять слова на повторяющие буквы
+// Пример 
+isIsogram( "Dermatoglyphics" ) == true
+isIsogram( "aba" ) == false
+isIsogram( "moOse" ) == false // -- ignore letter case
+// 
+function isIsogram(str) {
+    // создаем две переменных, которые будут перебирать массив и сравнивать неповторящиеся буквы и повторяющиеся
+    let i, j;
+    // так как мы работает с буквами (это стринговые значения), нужна стринг приравнять к нижнему регистру, чтобы любой запрос подходил под нижний регистр
+    str = str.toLowerCase();
+    // теперь даем задание тем двум переменным перебрать входящие данные с помощью цикла for
+    for (i = 0; i < str.length; ++i) {
+        for(j = 0; j < str.length; ++j) {
+            //  теперь пишем условие, что если j и I совпадают, значит программа обнаружила одинаковые символу, то есть стринг
+            if(str[i] === str[j]) {
+                // возвращаем false
+                return false;
+            }
+        }
+
+    }
+    // означает, что наша программа отработала верно
+    return true;
+}
+// или
+function isIsogram(str){
+    var hash = {};
+    str = str.toLowerCase();
+    for (var i = 0; i < str.length; i++) {
+      if (hash[str[i]]) {
+        return false;
+      }
+      hash[str[i]] = true;
+    }
+    return true; 
+ }
+//  
+function calculateTotal() {
+    // тело функции
+    console.log("hello js!");
+    const total = 20 + 20;
+    return total;
+}
+// Запускаем функцию
+const total = calculateTotal();
+
+const numOne = 13;
+const numTwo = 11;
+function calculateTotal(num1, num2) {
+    // тело функции
+   return num1 + num2;
+}
+// Запускаем функцию
+const total = calculateTotal(numOne, numTwo);
+// 
+// Называем функцию и указываем один параметр для входной строки
+// используем return для того чтобы вернуть результат этой функции
+// берем наш параметр, который получили на входной строке, и разделяем его пробелами
+// с помощью map перебираем входящее значение (например word, что и будет являться str)
+// далее с помощью стрелочной функции повторяем операциию с деление слова, но уже без пробела, затем переворачиваем
+// и объединяем
+function reverseWords(str) {
+    return str.split(" ").map(word => word.split("").reverse().join("")).join(" ")
+
+
+  }
+//   Write a function called startsWithVowel that takes a string as input and returns true if the string starts with a vowel, and false otherwise.
+
+// Write a function called removeVowels that takes a string as input and returns a new string with all the vowels removed.
+
+// Write a function called findLongestWord that takes a string as input and returns the longest word in the string.
+
+// Write a function called isPalindrome that takes a string as input and returns true if the string is a palindrome (i.e., the same forwards and backwards), and false otherwise.
+
+// Write a function called titleCase that takes a string as input and returns a new string with the first letter of each word capitalized.
+
+function strCount(str, letter) {
+    let count = 0;  // initialize a variable to keep track of the count
+    str = str.toLowerCase();
+    for (let i = 0; i < str.length; i++) {
+      if (str[i] === letter) {
+        count++;
+      }
+    }
+    return count;  // return the final count
+  }
+
+
+
+
+//   Complete the square sum function so that it squares each number passed into it and then sums the results together. (Use map and reduce methods)
+     function squareSum(numbers) {
+    let sum = numbers.map(el => el ** 2).reduce((acc, cur) => acc + cur, 0)
+    return sum;
+  }
+
+
+
+
+
+//   Complete the solution so that it reverses the string passed into it.
+//   'world'  =>  'dlrow'
+//   'word'   =>  'drow'
+
+  function solution(str){
+    return str.split("").reverse().join("").split(" ").reverse().join(" ");
+  }
+
+
+
+
+
+// There's a "3 for 2" (or "2+1" if you like) offer on mangoes. For a given quantity and price (per mango), calculate the total cost of the mangoes.
+// Examples
+// mango(2, 3) ==> 6    # 2 mangoes for $3 per unit = $6; no mango for free
+// mango(3, 3) ==> 6    # 2 mangoes for $3 per unit = $6; +1 mango for free
+// mango(5, 3) ==> 12   # 4 mangoes for $3 per unit = $12; +1 mango for free
+function mango(quantity, price){
+    let totalCost = 0;
+      if (quantity % 3 != 0) {
+        totalCost = (Math.floor(quantity / 3) * 2 + quantity % 3) * price;
+      }
+      else {
+        totalCost = (quantity / 3) * 2 * price;
+      }
+      return totalCost;
+
+    }
+
+
+    // Given a set of numbers, return the additive inverse of each. Each positive becomes negatives, and the negatives become positives.
+
+    // invert([1,2,3,4,5]) == [-1,-2,-3,-4,-5]
+    // invert([1,-2,3,-4,5]) == [-1,2,-3,4,-5]
+    // invert([]) == []
+    // You can assume that all values are integers. Do not mutate the input array/list.  
+
+
+    function invert(array) {
+        let negArr = array.map(num => -1 * num);
+        return negArr;
+      }
+
+
+
+
+
+// Complete the function that takes a non-negative integer n as input, and returns a list of all the powers of 2 with the exponent ranging from 0 to n ( inclusive ).
+
+// Examples
+// n = 0  ==> [1]        # [2^0]
+// n = 1  ==> [1, 2]     # [2^0, 2^1]
+// n = 2  ==> [1, 2, 4]  # [2^0, 2^1, 2^2]
+
+function powersOfTwo(n){
+  let powers = [];
+  for (let i = 0; i <= n; i++) {
+    powers.push(Math.pow(2, i));
+  }
+  return powers;
+}
+
+
+// Given a non-empty array of integers, return the result of multiplying the values together in order. Example:
+
+// [1, 2, 3, 4] => 1 * 2 * 3 * 4 = 24
+e
+
+
+function grow(x){
+    const total = x.reduce((a, b) => a * b);
+    return total;
+
+  }
+
+
+
+
+
+
+
+  // Summation
+  // Write a program that finds the summation of every number from 1 to num. The number will always be a positive integer greater than 0.
+
+  // For example (Input -> Output):
+
+  // 2 -> 3 (1 + 2)
+  // 8 -> 36 (1 + 2 + 3 + 4 + 5 + 6 + 7 + 8)
+
+  var summation = function (num) {
+    let sum = 0;
+     for (let i = 1; i <= num; i++) {
+      sum += i; 
+    }
+     return sum;
+   }
+
+
+
+
+  //  Your task is to make two functions ( max and min, or maximum and minimum, etc., depending on the language ) that receive a list of integers as input, and return the largest and lowest number in that list, respectively.
+
+  //  Examples (Input -> Output)
+  //  * [4,6,2,1,9,63,-134,566]         -> max = 566, min = -134
+  //  * [-52, 56, 30, 29, -54, 0, -110] -> min = -110, max = 56
+  //  * [42, 54, 65, 87, 0]             -> min = 0, max = 87
+  //  * [5]                             -> min = 5, max = 5
+
+var min = function(list){
+  return Math.min(...list);
+  }
+
+var max = function(list){
+
+  return Math.max(...list);
+}
+
+
+
+
+// In this simple exercise, you will create a program that will take two lists of integers, a and b. Each list will consist of 3 positive integers above 0, representing the dimensions of cuboids a and b. You must find the difference of the cuboids' volumes regardless of which is bigger.
+
+// For example, if the parameters passed are ([2, 2, 3], [5, 4, 1]), the volume of a is 12 and the volume of b is 20. Therefore, the function should return 8.
+
+// Your function will be tested with pre-made examples as well as random ones.
+
+// If you can, try writing it in one line of code.
+
+
+
+function findDifference(a, b) {
+  let volumeA = a[0] * a[1] * a[2];
+  let volumeB = b[0] * b[1] * b[2];
+  const difference = Math.abs(volumeA - volumeB);
+  return difference;
+}
+
+
+const person = {
+  nickname: " John",
+  last: "Cray",
+  age: 30,
+}
+for (let key in person) {
+  console.log(key + ":" + person[key])
+}
+
+
+
+
+
+
+const person = {
+  nickname: "John",
+  lastname: "Cray",
+  age: 30,
+}
+for (let key in person) {
+  alert(key + ":" + person[key]);
+}
+
+
+
+
+
+
+
+
+indexOf(str, pos)
+const str = "Hello world";
+console.log(str.indexOf("o"))
+
+
+
+
+
+
+
+
+let x;
+console.log(x);
+
+let x = null;
+console.log(x);

_mobile.scss

@@ -1,4 +1,4 @@
-@media (max-width: 767px) {
+@media (max-width: 768px) {
   .center {
     padding-left: 16px;
     padding-right: 16px;
@@ -73,11 +73,11 @@
     font-size: 14px;
     line-height: 22px;
   }
-  .footer____game-1 {
+  .footer__game-1 {
     display: flex;
     flex-direction: column;
   }
-  .footer____game-2 {
+  .footer__game-2 {
     display: flex;
     flex-direction: column-reverse;
   }

calculator.css

@@ -0,0 +1,36 @@
+.calculator {
+  width: 300px;
+  margin: auto;
+}
+input {
+  width: 100%;
+  border: none;
+  background-color: #0d0d0d;
+  color: #fff;
+  padding: 20px;
+  font-size: 25px;
+  text-align: right;
+}
+table {
+  margin-top: 10px;
+  border-collapse: collapse;
+  width: 100%;
+}
+button {
+  width: 100%;
+  padding: 10px;
+  background-color: #fff;
+  color: #262626;
+  border: none;
+  font-size: 20px;
+  cursor: pointer;
+}
+button:hover {
+  background-color: #0d0d0d;
+  color: #fff;
+  transition: 0.5s;
+}
+button#equal-sign {
+  background-color: #f1b21c;
+  color: #260b01;
+}

calculator.html

@@ -0,0 +1,52 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="UTF-8" />
+    <title>Calculator App</title>
+    <link rel="stylesheet" href="calculator.css" />
+  </head>
+  <body>
+    <div class="calculator">
+      <input type="text" id="input-box" disabled />
+      <table>
+        <tr>
+          <td><button onClick="buttonPressed('C')">C</button></td>
+          <td><button onClick="buttonPressed('%')">%</button></td>
+          <td><button onClick="buttonPressed('^')">^</button></td>
+          <td><button onClick="buttonPressed('/')">/</button></td>
+        </tr>
+        <tr>
+          <td><button onClick="buttonPressed('7')">7</button></td>
+          <td><button onClick="buttonPressed('8')">8</button></td>
+          <td><button onClick="buttonPressed('9')">9</button></td>
+          <td><button onClick="buttonPressed('*')">x</button></td>
+        </tr>
+        <tr>
+          <td><button onClick="buttonPressed('4')">4</button></td>
+          <td><button onClick="buttonPressed('5')">5</button></td>
+          <td><button onClick="buttonPressed('6')">6</button></td>
+          <td><button onClick="buttonPressed('-')">-</button></td>
+        </tr>
+        <tr>
+          <td><button onClick="buttonPressed('1')">1</button></td>
+          <td><button onClick="buttonPressed('2')">2</button></td>
+          <td><button onClick="buttonPressed('3')">3</button></td>
+          <td><button onClick="buttonPressed('+')">+</button></td>
+        </tr>
+        <tr>
+          <td><button onClick="buttonPressed('0')">0</button></td>
+          <td><button onClick="buttonPressed('.')">.</button></td>
+          <td><button onClick="buttonPressed('(')">(</button></td>
+          <td><button onClick="buttonPressed(')')">)</button></td>
+        </tr>
+        <tr>
+          <td colspan="4">
+            <button id="equal-sign" onClick="calculate()">=</button>
+          </td>
+        </tr>
+      </table>
+    </div>
+
+    <script src="script10.js"></script>
+  </body>
+</html>