VadymShakhmatenko
/
homework


			
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							<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        //3 persons
        let a = new Object();
        a.name = 'Petro'
        a.surname = 'Petroff'

        let b = new Object();
        b.name = 'Igor'
        b.surname = 'Igoroff'

        let c = new Object();
        c.name = 'Anton'
        c.surname = 'Antonoff'

        //different fields
        a.age = 15;
        a.fatherName = "Petrovich"

        b.car = 'Maseratti'
        b.sex = 'man'

        c.nationallity = 'tatarin'
        c.laptop = 'macbook'

        //fields check
        if ('fatherName' in a ) {
            alert(a.fatherName)
       
        }
        if ('sex' in b){
            alert(b.sex)
  
        }
        if ('laptop' in c) {
            alert(c.laptop)

        }

        //array of persons
        var persons = [];
        persons.push(a)
        persons.push(b)
        persons.push(c)
        persons.push({name : 'Archi' , surname: 'Archibalt' , sex : 'pet'})
      
       
        //loop of persons
        for (let i = 0; i < persons.length; i++) {
	    console.log(persons[i]);
        }

        //loop of name and surname
        for (let i = 0; i < persons.length; i++) {
	    console.log(persons[i].name + " " + persons[i].surname);
        }

        //loop of loop of values
        for (let i = 0; i < persons.length; i++) {
            for (let value of Object.values(persons[i])) {
                console.log(value); 
            }
        }

        //fullName
        for (let object of persons){
            if (object.name && object.surname){
                object.fullName = object.name + " " + object.surname
            }
        }

        //serialize
        JSON.stringify(persons)

        //deserialize 
        let d = '{"name" : "Artur","surname" : "Arturenko" , "fatherName": "Arturovich","age" : 34,"sex":"female"}'
        d = JSON.parse(d)
        persons[3] = d
        console.log(persons)

        //html
        let str = '<table border = "1">'
        for (let key in persons) {
            str +=
                `<tr> <td> name </td> <td> ${persons[key].name} </td> <td> surname </td> <td> ${persons[key].surname} </td> </tr> \n`;
        }
        str += "</table>"

        console.log(str)
        document.write(str)

        //HTML optional fields  ++++++  //HTML tr color
        let str2 = '<table border = "1">'
        for (let keys of persons){
             str2 +=
                `<tr> <td> ${keys} </td> <td> </td></tr> \n`;
        }
           
        str2 += "</table>"

        console.log(str2)
        document.write(str2)

        //destruct array
        let arr = [1,2,3,4,5, "a", "b","c"]
        let [odd1 , even1 , odd2 , even2 , odd3 , ...letters] = arr

        //destruct string
        let arr2 = [1, "abc"]
        let [number, [s1, s2, s3]] = arr2

        
        // destruct 2
        let obj = {name: 'Ivan',
           surname: 'Petrov',
           children: [{name: 'Maria'}, {name: 'Nikolay'}]
        }
        let {
                children: [{ name: name1 }, { name: name2 }],
            } = obj;

        //destruct 3 
        // let arr3 = [1,2,3,4, 5,6,7,10]
        // let [a ,b , {length = arr3.length}] = arr


    </script>
</body>
</html>