let mas = []
let a = {
    name: "Misha",
    surname: "Muslim"
}
a.fathername = "Svinonich"
a.age = "24"
a.country = "Ukraine"
a.sex = "male"
a.marriage = true;
let b = {
    name: "Oleh",
    surname: "Glamazda",
}

b.age = "25"
b.country = "Ukraine"
b.marriage = false
let c = {
    name: "Katya",
    surname: "Krasnoshok",
}
c.age = "30"
c.sex = "female"
let persons = []
persons.push(a, b, c)
function fieldsCheck(check) {
    for(let i = 0; i < persons.length; i++) {
        let str = ""
        check = persons[i]
        for(let key in check){
            (key == "name" || key == "surname" ) ? str += ""
            : str += key + " "
        }
        if(str == "") {
            alert("Nothing in " + check.name)
        } else {
            alert(str + " in " + check.name)
        }
    }
}
// fieldsCheck()
persons.push({name: "Tom",
            surname: "Motgan",
            country: "UK",
            marriage: true         
})
function personsObj(obj) {
    for (let i = 0; i < obj.length; i++){
        console.log(obj[i])
    }
}
// personsObj(persons)
function personsNamSurn(obj) {
    for(let i = 0; i < obj.length; i++) {
        console.log(obj[i].name + " " + obj[i].surname)
    }
}
// personsNamSurn(persons)
function personsValues(obj) {
    let cons = "";
    for(let i = 0; i < obj.length; i++) {
        let check = obj[i]
        for (let key in check) {
            cons += check[key] + " "
        }
        cons += "\n"
    }
    console.log(cons)
}
// personsValues(persons)

function fullName(obj) {
    let value = "";
    for(let i = 0; i < obj.length; i++) {
        let check = obj[i]
        for(let key in check) {
            if(key == "name" || key == "fathername" || key == "surname"){
                value += check[key] + " "
            }
        }
        check.fullName = value
    }
    console.log(value)
}
fullName(persons)
var json = (JSON.stringify(persons, null, " "))

// console.log(json)
var e = JSON.parse('{"name":"Petr","surname":"Vlasenco","fathername":"Andreevich","age":"40","country":"Belarus","marriage":"true"}')
persons.push(e)

function toHtmlTable(obj) {
    var str = "<table border='1'>"
    for (let i=0;i<obj.length;i++){
        let check = obj[i]
        str += `<tr><td>${i}</td>`
        for (let key in check){
            str += `<td>${check[key]}</td>`
        }
        str += `</tr>`
    }
    str += "</table>"

    document.write(str)
}
// toHtmlTable(persons)

function htmlOptional(obj) {
    debugger
    let str = `<table border='1'><tr><td style = "background-color: yellow"></td>`
    let valueMas =[]
    for (let i=0;i<obj.length;i++){
        let check = obj[i]
        for(let key in check) {
            if(str.includes(key)){
            } else{
            str +=`<th  style = "background-color: yellow">${key}</th>`
            valueMas.push(key)
            }
        }
    }
    for (let j=0;j<obj.length;j++){
        let check = obj[j]
        str += `<tr><td style = "background-color: yellow">${j}</td>`
        let keysArr = Object.keys(check);
        for(let k = 0; k < valueMas.length; k++) {
            if(keysArr.indexOf(valueMas[k]) == -1) {
               str += `<td style = "background-color: red"></td>`
            } else {
               str += `<td style = "background-color: #89e0c0">${check[valueMas[k]]}</td>`
            }
        }
        str += `</tr>`
    }
    str += "</table>"

    console.log(str)
    document.write(str)
}
// htmlOptional(persons)