homework/hw5/script.js

//3 persons
let a = {
    'Name': 'Sergei',
    'surname': 'Levshnia',
    'fathername': 'Sergeevich'
}
console.log(a['Name'], a.surname)

let b = {
    'Name': 'Thomas',
    surname: 'Anderson'
}
console.log(b.Name, b.surname)

let c = {
    Name: 'Sylvester',
    surname: 'Stallone'
}
console.log(c['Name'], c['surname'])

//different fields
a.age = 20
b.nickname = 'Neo'
c.movies = ['Rocky', 'Rambo: First Blood', 'Cobra', 'Over the Top']
console.log(a, b, c)

//fields Check
function fieldCheck(obj, string) {
    if(string in obj) {
        alert(obj[string])
    }
}
fieldCheck(a, 'age')
fieldCheck(b, 'awoken')
fieldCheck(c, 'movies')

//array of persons
let persons = []
persons.push(a, b, c)
persons[persons.length] = {
    Name: 'Billy',
    surname: 'Joebob'
}

//loop of persons
console.log('------------------------')
console.log('loop of persons:')
for(i in persons) {
    console.log(persons[i])
}

//loop of name and surname
console.log('------------------------')
console.log('loop of name and surname:')
for(i in persons) {
    console.log(persons[i].Name, persons[i].surname)
}

//loop of loop of values
console.log('------------------------')
console.log('loop of loop of values:')
for(let i in persons) {
    for(let j in persons[i]) {
        console.log(persons[i][j])
    }
    console.log('!-----------------------')
}

//fullName
for(let i in persons) {
    persons[i].fullName = `${persons[i].surname} ${persons[i].Name}` + (persons[i].fathername? ` ${persons[i].fathername}` : '')
}

//serialize
let serialize = JSON.stringify(persons)
console.log(serialize)

//deserialize 
persons.push(JSON.parse(serialize)[0])
console.log(persons)

//HTML
let str = "<table border='1'>"
for (let i = 0; i < persons.length; i++) {
    str += `<tr><td>${persons[i].Name}</td><td>${persons[i].surname}</td></tr>`
}
str += "</table>"
document.write(str)

//Html optional fields
let htmlOptional = '<h2>HTML optional fields</h2><table border="1">'
let tableHeaders = Object.keys(persons[0])

htmlOptional += '<tr style="background-color: black; color: white;">'
for(let i = 0; i < tableHeaders.length; i++) {
    for(let j in persons[i]) {
        if(!tableHeaders.includes(j)) {
            tableHeaders.push(j)
        }
    }
    htmlOptional += `<th>${tableHeaders[i]}</th>`
}
htmlOptional += '</tr>'

for(let i = 0; i < persons.length; i++) {
    //HTML tr color
    htmlOptional += i % 2 === 0? '<tr style="background-color: firebrick; color: white">' : '<tr>'
    //HTML th optional
    for(let cols = 0; cols < tableHeaders.length; cols++) {
            htmlOptional += persons[i][tableHeaders[cols]]? `<td style="text-align:center">${persons[i][tableHeaders[cols]]}</td>` :
                                                            `<td style="text-align:center; color: black;">X</td>`
    }
    htmlOptional += '</tr>'
}
htmlOptional += '</table>'
document.write(htmlOptional)

// blue belt
class Markup {
    constructor(tagName, [...nestedTags]=[], {...attrs}={}, text='') {
        this.tagName = tagName,
        this.attrs = attrs
        this.text = text
        this.nestedTags = nestedTags
    }
}

let md3 = new Markup(
                'table', 
                [
                    new Markup(
                        'tr', 
                        [
                            new Markup(
                                'td', 
                                undefined, 
                                {disabled:true}, 
                                'some text'
                            ),
                            new Markup(
                                'td', 
                                undefined, 
                                undefined, 
                                'some text2'
                            )
                        ]
                    ),
                    new Markup(
                        'tr', 
                        [
                            new Markup(
                                'td', 
                                [ 
                                    new Markup(
                                        'div', 
                                        [
                                            new Markup(
                                                'p', 
                                                undefined, 
                                                {disabled:true}, 
                                                'some textp'
                                            ),
                                            new Markup(
                                                'p', 
                                                undefined, 
                                                {style:'font-weight:800;color:red'}, 
                                                'some textp'
                                            )
                                        ]
                                    )
                                ],
                                {style:'background-color:purple;color:white;'},
                                'some text div'
                            ),
                            new Markup(
                                'td', 
                                undefined, 
                                {class:'someclass'}, 
                                'some text4'
                            )
                        ]
                    )
                ],
                {border: 1, style:"color:'red';"}
            )

function stringifyMdObject(Md_obj) {
    let str = ''
    for(let key in Md_obj) {
        if(key === 'tagName') {
            str += `<${Md_obj[key]}`
            if(Md_obj.attrs.length !== 0) {
                continue;
            } else {
                str += `>`
            }
        }

        if(key === 'nestedTags') {
            for(let i = 0; i < Md_obj[key].length; i++) {
                str += stringifyMdObject(Md_obj[key][i])
            }            
        }

        if(key === 'attrs' && Md_obj[key].length !== 0) {
            for(let i in Md_obj.attrs) {
                str += ` ${i}="${Md_obj.attrs[i]}"`
            }
            str += `>`
        }
    }
    str += `${Md_obj.text}`
    str += `</${Md_obj.tagName}>`

    return str
}

document.write(stringifyMdObject(new Markup('h2',[new Markup('span',undefined,{style:'color:blue;'},'Blue ')],undefined,'belt')))
document.write(stringifyMdObject(md3))

//destruct array
let arr = [1,2,3,4,5, "a", "b", "c"]

let [even1, even2] = arr.filter(item => isNaN(item)? false: !(item % 2))
let [odd1, odd2, odd3] = arr.filter(item => isNaN(item)? false: item % 2)
let letters = arr.filter(item => isNaN(item))

console.log(even1, even2)
console.log(odd1, odd2, odd3)
console.log(letters)

let arr2 = [1, 'abc']

let [number=[0], [s1, s2, s3]] = arr2
console.log(number, s1, s2, s3)

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

let {children:[{name:name1}, {name:name2}]} = obj
console.log(name1, name2)

//destruct 3
let destruct3 = [1,2,3,4, 5,6,7,10]
// A и B ВМЕСТО МАЛЕНЬКИХ a и b поскольку я их уже использовал в коде
let {0:A, 1:B, length} = destruct3
console.log(A, B, length)

//black belt
let history = '1111'
let predictArray = {}

while(true) {
    console.log(`My prediction is: ${predictArray[history]? predictArray[history] : Math.random() > 0.5? 1 : 0}`)
    let newValue = prompt('input 1 or 2', '')

    if(+newValue === 1 || +newValue === 2) {
        predictArray[history] = +newValue

        history = history.split('')
        history.shift()
        history.push(newValue)
        history = history.join('')
    } else if(newValue === null){
        break;
    } else {
        alert('wrong value given')
    }
}