lesson_7 ready

lesson_7/js/index.js

@@ -1 +1,220 @@
-'use strict'
+'use strict'
+
+// задача 1
+
+function isSpam(text, spamWord) {
+    let lowerStr = text.toLowerCase();
+
+    return lowerStr.includes('qwe') || lowerStr.includes('asq');
+}
+
+let spamWord = ['qwe', 'aSq'],
+    text = 'qWe';
+
+let check = isSpam(text, spamWord);
+console.log(check);
+
+
+// задача 2
+
+function getCapitalizedNamesString(str) {
+    str = str.map(function (words) {
+        return words = words.charAt(0).toLocaleUpperCase() + words.slice(1).toLowerCase();
+    })
+    return str.join(`, `);
+};
+
+let str = ['МаШа', 'кАтя', 'сВетА'];
+let checkWords = getCapitalizedNamesString(str);
+
+console.log(checkWords);
+
+
+// задача 3
+
+function getNames(names) {
+    // fined random index
+    let index = Math.floor(Math.random() * names.length);
+    // fined item
+    return names[index];
+}
+
+let name = ['Юлия', 'Дмитрий', 'Владимир', 'Ольга'];
+let rundomName = getNames(name);
+console.log(rundomName + " сегодня дежурный в классе ");
+
+
+// задача 4
+
+function cutText(str, n) {
+    let result = (str.length > n) ? str.substr(0, n) + '...' : str;
+    return result;
+}
+
+let str = 'Pisagfjd';
+let n = 3;
+let res = cutText(str, n);
+console.log(res);
+
+
+// задача 5
+
+let newDate;
+
+function convertDate(date) {
+    return newDate = date.replace(/-/g, '.');
+}
+
+let date = '25-12-1992';
+let repDate = convertDate(date)
+console.log(newDate);
+
+
+// задача 6
+
+function trueLehgth(array) {
+    for (let i = 0; i < array.length; i++) {
+        array1 = array.filter(function () {
+            return true;
+        });
+    }
+    return array1;
+}
+
+let array = [5, 2, , 3, 4, , , 'num'];
+let array1 = [];
+let newArray = trueLehgth(array);
+console.log(array1.length);
+
+
+// задача 7
+
+let user;
+let sum = 0;
+let i;
+
+function findPriceById(items) {
+    for (i = 0; i < items.length; i++) {
+        sum += items[i].price;
+    }
+    return sum;
+};
+
+let items = [{
+        name: "Морковь",
+        amount: 3,
+        price: 2.50
+    },
+    {
+        name: "Морковь",
+        amount: 35,
+        price: 2.50
+    },
+    {
+        name: "Морковь",
+        amount: 35,
+        price: 10
+    }
+            ];
+let result = findPriceById(items);
+console.log(result);
+
+
+// задача 8
+
+function findPriceById(id, items) {
+    let findedItem = items.find(function (item) {
+        return item.id === id;
+    });
+    return findedItem.price * findedItem.amount
+}
+
+let items8 = [
+    {
+        id: 1,
+        name: "Морковь",
+        amount: 3,
+        price: 2.50
+    },
+    {
+        id: 2,
+        name: "Морковь",
+        amount: 5,
+        price: 10.50
+    },
+    {
+        id: 3,
+        name: "Морковь",
+        amount: 15,
+        price: 2
+    },
+];
+
+console.log(findPriceById(3, items8))
+
+
+// задача 9
+
+function findPriceById(category, items) {
+    let findedItem = items.filter(function (item) {
+        return item.category === category;
+    });
+    return findedItem;
+}
+
+let arr = [
+    {
+        id: 1,
+        name: "Морковь",
+        amount: 3,
+        price: 2.50
+    },
+    {
+        id: 2,
+        name: "Груша",
+        amount: 5,
+        price: 10.50,
+        category: 'vegetables'
+    },
+    {
+        id: 3,
+        name: "Яблоко",
+        amount: 15,
+        price: 2,
+        category: 'vegetables'
+    },
+];
+
+let veg = findPriceById('vegetables', arr);
+
+console.log(veg);
+
+// задача 10
+
+function compareArrays(arr1, arr2) {
+    return arr1.length === arr2.length && arr1.every(function (elem, index) {
+        return elem === arr2[index];
+    })
+}
+
+let arr1 = [1, 2, 3],
+    arr2 = [1, 3, 2];
+let compare = compareArrays(arr1, arr2);
+console.log(compare);
+
+
+// задача 11
+
+function sum(arr) {
+    for (i = 0; i < arr.length; i++) {
+        for (j = 0; j < arr[i].length; j++)
+            total += arr[i][j];
+    }
+    return total;
+}
+
+let arr = [[1, 2, 3], [4, 5], [6]];
+let total = 0;
+let i, j;
+let result = sum(arr);
+console.log(result);