Cont'd Day1, completed destructuring and spreading exercises, will merge to master and start functional programming

solutions/day-01/destructure_spreading/level1.js

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+/*Create a function called getPersonInfo. The getPersonInfo function 
+takes an object parameter. The structure of the object and the output 
+of the function is given below. Try to use both a regular way and destructuring 
+and compare the cleanness of the code. If you want to compare your solution 
+with my solution, check this link.*/
+
+/*
+Asabeneh Yetayeh lives in Finland. He is  250 years old. He is an Instructor and Developer. 
+He teaches HTML, CSS, JavaScript, React, Redux, Node, MongoDB, Python and D3.js. He speaks 
+Amharic, English and a little bit of Suomi(Finnish)
+*/
+
+const person = {
+    firstName: 'Asabeneh',
+    lastName: 'Yetayeh',
+    age: 250,
+    country: 'Finland',
+    job: 'Instructor and Developer',
+    skills: [
+        'HTML',
+        'CSS',
+        'JavaScript',
+        'React',
+        'Redux',
+        'Node',
+        'MongoDB',
+        'Python',
+        'D3.js',
+    ],
+    languages: ['Amharic', 'English', 'Suomi(Finnish)'],
+}
+
+let getPersonInfo = ({firstName, lastName,age,country,job,skills,languages}) =>{
+console.log(`${firstName} ${lastName} live in ${country}. He is ${age} years old. He is an ${job}. 
+He teaches ${skills[0]}, ${skills[1]}, ${skills[2]}, ${skills[3]}, ${skills[4]}, ${skills[5]}, ${skills[6]}, ${skills[7]}, and ${skills[8]}.
+He speaks ${languages[0]}, ${languages[1]} and a little bit of ${languages[2]}.`);
+}
+getPersonInfo(person);

solutions/day-01/destructure_spreading/script.js

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+// setInterval
+
+// - In JavaScript, we use setInterval higher order function to do some 
+// activity continuously with in some interval of time. The setInterval 
+// global method take a callback function and a duration as a parameter. 
+// The duration is in milliseconds and the callback will be always called in that interval of time.
+let sayHello = ()=>{
+    console.log('Hello');
+}
+setInterval(sayHello, 2000); // it prints hello every 2 seconds
+
+// setTimeout
+
+// In JavaScript, we use setTimeout higher order function to execute some 
+// action at some time in the future. The setTimeout global method take a 
+// callback function and a duration as a parameter. The duration is in milliseconds 
+// and the callback wait for that amount of time.
+let sayGoodBye = ()=>{
+    console.log('Goodbye');
+}
+setTimeout(sayGoodBye, 3000);
+
+// Destructuring when we loop through arrays
+const countries = [
+    ['Finland', 'Helsinki'],
+    ['Sweden', 'Stockholm'],
+    ['Norway', 'Oslo'],
+];
+for (const [country, city] of countries) {
+    console.log(country, city);
+}
+
+// Destructuring during loop through an array
+const languages = [
+    { lang: 'English', count: 91 },
+    { lang: 'French', count: 45 },
+    { lang: 'Arabic', count: 25 },
+    { lang: 'Spanish', count: 24 },
+    { lang: 'Russian', count: 9 },
+    { lang: 'Portuguese', count: 9 },
+    { lang: 'Dutch', count: 8 },
+    { lang: 'German', count: 7 },
+    { lang: 'Chinese', count: 5 },
+    { lang: 'Swahili', count: 4 },
+    { lang: 'Serbian', count: 4 },
+]
+for (const { lang, count } of languages) {
+    console.log(`The ${lang} is spoken in ${count} countries.`)
+}
+
+// Destructuring function parameter
+const rectangle = { width: 20, height: 10 };
+const calcualteArea = ({ width, height }) => width * height;
+const calculatePerimeter = ({ width, height } = 2 * (width + height));
+
+
+// Spread operator to copy object
+// We can copy an object using a spread operator
+const user = {
+    name: 'Asabeneh',
+    title: 'Programmer',
+    country: 'Finland',
+    city: 'Helsinki',
+}
+
+const copiedUser = { ...user }
+console.log(copiedUser)
+
+
+// Modifying or changing the object while copying
+const users = {
+    name: 'Asabeneh',
+    title: 'Programmer',
+    country: 'Finland',
+    city: 'Helsinki',
+}
+
+const copiedUsers = { ...user, title: 'instructor' }
+console.log(copiedUser)
+// {name: "Asabeneh", title: "instructor", country: "Finland", city: "Helsinki"}