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30-Days-Of-React
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Fitsumhelina 10 months ago
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353
Exercises/day-1/object-exercise-3.js
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@ -1,75 +1,75 @@
// Exercises: Level 3
// Create an object literal called personAccount. It has firstName, lastName, incomes, expenses properties and it has totalIncome, totalExpense, accountInfo,addIncome, addExpense and accountBalance methods. Incomes is a set of incomes and its description and expenses is a set of incomes and its description.
const personAccount = {
firstName: "fitsum",
lastName: "helina",
incomes: [
{ description: "Salary", amount: 50000 },
{ description: "Bonus", amount: 10000 },
],
expenses: [
{ description: "Rent", amount: 10000 },
{ description: "Groceries", amount: 5000 },
],
totalIncome() {
return this.incomes.reduce((total, income) => total + income.amount, 0);
},
totalExpense() {
return this.expenses.reduce((total, expense) => total + expense.amount, 0);
},
accountInfo() {
return `Account Information: ${this.firstName} ${this.lastName}`;
},
addIncome(description, amount) {
this.incomes.push({ description, amount });
},
};
// // Exercises: Level 3
// **** Questions:2, 3 and 4 are based on the following two arrays:users and products ()
// // Create an object literal called personAccount. It has firstName, lastName, incomes, expenses properties and it has totalIncome, totalExpense, accountInfo,addIncome, addExpense and accountBalance methods. Incomes is a set of incomes and its description and expenses is a set of incomes and its description.
// const personAccount = {
// firstName: "fitsum",
// lastName: "helina",
// incomes: [
// { description: "Salary", amount: 50000 },
// { description: "Bonus", amount: 10000 },
// ],
// expenses: [
// { description: "Rent", amount: 10000 },
// { description: "Groceries", amount: 5000 },
// ],
// totalIncome() {
// return this.incomes.reduce((total, income) => total + income.amount, 0);
// },
// totalExpense() {
// return this.expenses.reduce((total, expense) => total + expense.amount, 0);
// },
// accountInfo() {
// return `Account Information: ${this.firstName} ${this.lastName}`;
// },
// addIncome(description, amount) {
// this.incomes.push({ description, amount });
// },
// };
const users = [
{
_id: "ab12ex",
username: "Alex",
email: "alex@alex.com",
password: "123123",
createdAt: "08/01/2020 9:00 AM",
isLoggedIn: false,
},
{
_id: "fg12cy",
username: "Asab",
email: "asab@asab.com",
password: "123456",
createdAt: "08/01/2020 9:30 AM",
isLoggedIn: true,
},
{
_id: "zwf8md",
username: "Brook",
email: "brook@brook.com",
password: "123111",
createdAt: "08/01/2020 9:45 AM",
isLoggedIn: true,
},
{
_id: "eefamr",
username: "Martha",
email: "martha@martha.com",
password: "123222",
createdAt: "08/01/2020 9:50 AM",
isLoggedIn: false,
},
{
_id: "ghderc",
username: "Thomas",
email: "thomas@thomas.com",
password: "123333",
createdAt: "08/01/2020 10:00 AM",
isLoggedIn: false,
},
];
// // **** Questions:2, 3 and 4 are based on the following two arrays:users and products ()
// const users = [
// {
// _id: "ab12ex",
// username: "Alex",
// email: "alex@alex.com",
// password: "123123",
// createdAt: "08/01/2020 9:00 AM",
// isLoggedIn: false,
// },
// {
// _id: "fg12cy",
// username: "Asab",
// email: "asab@asab.com",
// password: "123456",
// createdAt: "08/01/2020 9:30 AM",
// isLoggedIn: true,
// },
// {
// _id: "zwf8md",
// username: "Brook",
// email: "brook@brook.com",
// password: "123111",
// createdAt: "08/01/2020 9:45 AM",
// isLoggedIn: true,
// },
// {
// _id: "eefamr",
// username: "Martha",
// email: "martha@martha.com",
// password: "123222",
// createdAt: "08/01/2020 9:50 AM",
// isLoggedIn: false,
// },
// {
// _id: "ghderc",
// username: "Thomas",
// email: "thomas@thomas.com",
// password: "123333",
// createdAt: "08/01/2020 10:00 AM",
// isLoggedIn: false,
// },
// ];
const products = [
{
@ -100,53 +100,54 @@ const products = [
likes: ["fg12cy"],
},
];
// Imagine you are getting the above users collection from a MongoDB database.
// a. Create a function called signUp which allows user to add to the collection. If user exists, inform the user that he has already an account.
const newuser = {
_id: "eedfcf",
username: "John Doe",
email: "johndoe@johndoe.com",
password: "123456",
createdAt: "08/01/2020 10:15 AM",
isLoggedIn: null,
};
const signUp = (newuser) => {
// //solution1
const userExists = users.find((user) => user._id === newuser._id);
if (userExists) {
console.log("User already exists!");
return;
} else {
users.push(newuser);
console.log("User added successfully!");
}
// solution 2
for (const user of users) {
if (user._id === newuser._id) {
console.log("User already exists!");
return;
} else {
users.push(newuser);
console.log("User added successfully!");
break;
}
}
};
signUp(newuser);
// b. Create a function called signIn which allows user to sign in to the application
const signIn = (newuser) => {
const exists = users.find((user) => user._id === newuser._id);
if (exists) {
exists.isLoggedIn = true;
console.log("user signIn success");
} else {
exists.isLoggedIn = false;
console.log("account does not exist");
}
};
// // Imagine you are getting the above users collection from a MongoDB database.
// // a. Create a function called signUp which allows user to add to the collection. If user exists, inform the user that he has already an account.
// const newuser = {
// _id: "eedfcf",
// username: "John Doe",
// email: "johndoe@johndoe.com",
// password: "123456",
// createdAt: "08/01/2020 10:15 AM",
// isLoggedIn: null,
// };
// const signUp = (newuser) => {
// // //solution1
// const userExists = users.find((user) => user._id === newuser._id);
// if (userExists) {
// console.log("User already exists!");
// return;
// } else {
// users.push(newuser);
// console.log("User added successfully!");
// }
// // solution 2
// for (const user of users) {
// if (user._id === newuser._id) {
// console.log("User already exists!");
// return;
// } else {
// users.push(newuser);
// console.log("User added successfully!");
// break;
// }
// }
// };
// signUp(newuser);
// // b. Create a function called signIn which allows user to sign in to the application
// const signIn = (newuser) => {
// const exists = users.find((user) => user._id === newuser._id);
// if (exists) {
// exists.isLoggedIn = true;
// console.log("user signIn success");
// } else {
// exists.isLoggedIn = false;
// console.log("account does not exist");
// }
// };
// The products array has three elements and each of them has six properties.
const product = [
@ -174,57 +175,83 @@ const product = [
name: "TV",
description: "Smart TV: Procaster",
price: 400,
ratings: [{ userId: "fg12cy", rate: 5 }],
ratings: [{ userId: "fg12cy", rate: 5 }, { userId: "zwf8md", rate: 3.5 },],
likes: ["fg12cy"],
},
];
// a. Create a function called rateProduct which rates the product
const rateproduct = (productId, userid, rate) => {
const product = product.find((item) => productId === item._id);
if (product) {
const exixst = product.ratings.find((rating) => userid === rating.userId);
if (exixst) {
console.log("user already rated this product");
} else {
product.rating.push({ userid, rate });
}
} else {
console.log("product not found");
}
};
// b. Create a function called averageRating which calculate the average rating of a product
const averageRating = (productid, products) => {
const product = products.find((item) => productid === item._id);
if (product) {
if (product.ratings.length === 0) {
console.log(`No ratings yet for ${product.name}`);
return;
}
const sum = product.ratings.reduce((sum, rating) => sum + rating.rate, 0);
const average = sum / product.ratings.length;
console.log(
`average rating for ${product.name} is ${average} and it had ${product.ratings.length} rates `
);
} else {
console.log("product not found");
}
};
// const rateproduct = (productId, userid, rate) => {
// const product = product.find((item) => productId === item._id);
// if (product) {
// const exixst = product.ratings.find((rating) => userid === rating.userId);
// if (exixst) {
// console.log("user already rated this product");
// } else {
// product.rating.push({ userid, rate });
// }
// } else {
// console.log("product not found");
// }
// };
// Create a function called likeProduct. This function will helps to like to the product if it is not liked and remove like if it was liked.
const likeProduct = (productId, userId, products) => {
const product = products.find((item) => productId === item._id);
if (product) {
const exixst = product.likes.find((like) => userId === like);
if (exixst) {
product.likes = product.likes.filter((like) => like !== userId);
console.log(`${userId} has removed like from ${product.name}`);
} else {
product.likes.push(userId);
console.log(`${userId} has liked ${product.name}`);
}
} else {
console.log("product not found");
}
// // b. Create a function called averageRating which calculate the average rating of a product
// const averageRating = (productid, products) => {
// const product = products.find((item) => productid === item._id);
// if (product) {
// if (product.ratings.length === 0) {
// console.log(`No ratings yet for ${product.name}`);
// return;
// }
// const sum = product.ratings.reduce((sum, rating) => sum + rating.rate, 0);
// const average = sum / product.ratings.length;
// console.log(
// `average rating for ${product.name} is ${average} and it had ${product.ratings.length} rates `
// );
// } else {
// console.log("product not found");
// }
// };
// // Create a function called likeProduct. This function will helps to like to the product if it is not liked and remove like if it was liked.
// const likeProduct = (productId, userId, products) => {
// const product = products.find((item) => productId === item._id);
// if (product) {
// const exixst = product.likes.find((like) => userId === like);
// if (exixst) {
// product.likes = product.likes.filter((like) => like !== userId);
// console.log(`${userId} has removed like from ${product.name}`);
// } else {
// product.likes.push(userId);
// console.log(`${userId} has liked ${product.name}`);
// }
// } else {
// console.log("product not found");
// }
// };
// const userratedproduct = (productId, userId, products) => {
// const rated = products.filter((item) => item.rating.userId===userId)
// if (rated != 0) {
// const product = products.filter((item) => productId === item._id);
// if (product) {
// console.log(`${userId} has rated ${product.name}`);
// } else {
// console.log("product not found");
// }
// }
// }
const userRatedProducts = (userId, products) => {
const ratedProducts = products.filter((item) =>
item.ratings.find((rating) => rating.userId === userId)
);
return ratedProducts.map((item) => item.name);
};
const ratedByUser = userRatedProducts("zwf8md", product);
console.log(ratedByUser);

14
Exercises/test/test.js
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@ -23,7 +23,6 @@
// hey()
// const countries = ['Finland', 'Estonia', 'Sweden', 'Norway']
// console.log(countries.map((country) => country.toUpperCase()))
// const newarr = []
// countries.forEach(x => {
// if (x.includes('land')) {
@ -31,4 +30,15 @@
// }
// });
// console.log(newarr)
// console.log(countries.map((country) => country.toUpperCase()))
// console.log(countries.filter((country) => !country.includes('land')))
// console.log(newarr)
// const numbers = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
// const sum = numbers.reduce((x, y) => x + y)
// console.log(sum) // 55
// const numbers = [1, 2, 3, 4, 5]
// const value = numbers.reduce((acc, cur) => acc * cur ,0)
// console.log(value) // 0

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