Anton.Homework/Массивы.js

//Confirms
{
    const arr = [confirm('Ты мужчина?'),confirm('Ты женщина?'),confirm('Тебе больше 18-ти лет?')]
    console.log(arr)//[true, false, true]
}

//Prompts
{
    const arr = []
    arr[0]=prompt('Ты мужчина?')
    arr[1]=prompt('Ты женщина?')
    arr[2]=prompt('Тебе больше 18-ти лет?')
    console.log(arr)// ['да', 'нет', 'да']
}

//Item access 
{
    const arr = ['нулевой','первый','второй']
    indexArr = prompt('Введите индекс массива')
    console.log(arr[indexArr])
}

//Item change
{
    const arr = ['нулевой','первый','второй']
    indexArr = prompt('Введите индекс массива')//если тут будет '2'
    meaningArr = prompt('Введите значение для выбраного индекса')// а тут слово 'четвертый'
    arr[indexArr]= meaningArr
    console.log(arr)// то здесь будет такой массив ['нулевой', 'первый', 'четвертый']
}

//Multiply table
{
    //const arr = [[],[0,1,2,3,4,5,6,7,8,9,10],[0,2,4,6,8,10,12,14,16,18,20],[0,3,6,9,12,15,18,21,24,27,30],[0,4,8,12,16,20,24,28,32,36,40],[0,5,10,15,20,25,30,35,40,45,50]]
    const arr = [[0,0,0,0,0],[0,1,2,3,4],[0,2,4,6,8],[0,3,6,9,12],[0,4,8,12,16]]
    console.log(arr[3][4])// ответ 12
}

//Multiply table slice
{
    const arr = [[0,0,0,0,0],[0,1,2,3,4],[0,2,4,6,8],[0,3,6,9,12],[0,4,8,12,16]]
    let arr2 = [arr[1].slice(1),arr[2].slice(1),arr[3].slice(1),arr[4].slice(1)]
}


//IndexOf Word
{
    let str = prompt('Введите строку из несколький слов').split(' ');
    let strIndex = prompt('Введите искомое слово');
    let arr = str.indexOf(strIndex);
    if (arr === -1){
        alert('Слово не найдено');
    }
    else{alert('Ваше слово '+(arr+1)+'-е по счету');}
}


//Reverse
{
    let arr = []
    arr.push(prompt('Введите первый элемент'))
    arr.push(prompt('Введите второй элемент'))
    arr.push(prompt('Введите третий элемент'))
    arr.push(prompt('Введите четвертый элемент'))
    arr.push(prompt('Введите пятый элемент'))
    let arr2 = []
    arr2.push(arr.pop())
    arr2.push(arr.pop())
    arr2.push(arr.pop())
    arr2.push(arr.pop())
    arr2.push(arr.pop())
    console.log(arr2)
//Reverse 2
    let arr3 = []
    arr3.unshift(arr2.shift())
    arr3.unshift(arr2.shift())
    arr3.unshift(arr2.shift())
    arr3.unshift(arr2.shift())
    arr3.unshift(arr2.shift())    
}


//Copy
{
    const arr = [[0,0,0,0,0],[0,1,2,3,4],[0,2,4,6,8],[0,3,6,9,12],[0,4,8,12,16]]
    const arr2 = arr
}

//Deep Copy
{
    const arr = [[0,0,0,0,0],[0,1,2,3,4],[0,2,4,6,8],[0,3,6,9,12],[0,4,8,12,16]]
    const arr2 = arr.slice()
}

//Array Equals
{
    const arr = [1,2,3]
    const arr2 = arr
    arr === arr2//true
}

//Flat
{
    const arr = [[0,0,0,0,0],[0,1,2,3,4],[0,2,4,6,8],[0,3,6,9,12],[0,4,8,12,16]]
    const arr2 = [...arr[0],...arr[1],...arr[2],...arr[3],...arr[4]]
    console.log(arr2.length)//25 
}

//Destruct
{
    let str = prompt('Введите текст')
    const [a,,,,b,,,,c] = str
    alert(a+b+c)
}

//Destruct default
{
    let str = prompt('Введите текст')
    const [a='!',,,,b='!',,,,c='!'] = str
    alert(a+b+c)
}

//Multiply table rest
{
    const arr = [[0,0,0,0,0],[0,1,2,3,4],[0,2,4,6,8],[0,3,6,9,12],[0,4,8,12,16]]
    const [,[,...a],[,...b],[,...c],[,...d]] = arr
    const arr2 = [a,b,c,d]
    const arr3 = [...arr2[0],...arr2[1],...arr2[2],...arr2[3]]
    console.log(arr3) // [1, 2, 3, 4, 2, 4, 6, 8, 3, 6, 9, 12, 4, 8, 12, 16]
}

//For Alert
{
    const names    = ["John", "Paul", "George", "Ringo"]
    for (let name of names)
    {
        alert(`Hello, ${name}`)
    }
}


//For Select Option
{
    const currencies = ["USD", "EUR", "GBP", "UAH"]
    let   str = "<select>"
    for (let currency of currencies){
        str += '<option>'+currency+'</option>'
    }
    str+= "</select>"
    document.write(str)
}

//For Table Horizontal
{
    const names = ["John", "Paul", "George", "Ringo"]
    let   str = "<table border='1'>"
    for (let namesTable of names){
        str += '<td>'+namesTable+'</td>'
    }
    str+= "</table>"
    document.write(str)
}


//For Table Vertical
{
    const names = ["John", "Paul", "George", "Ringo"]
    let   str = "<table border='1'>"
    for (let namesTable of names){
        str += '<tr><td>'+namesTable+'</td></tr>'
    }
    str+= "</table>"
    document.write(str)
}

//For Table Letters
{
    const currencies = ["USD", "EUR", "GBP", "UAH"]
    let   str = "<table border='1'>"
    for (let currency of currencies){ 
        str += '<tr>'+currency+'</tr>'
        console.log(currency)
        for (let letter of currency){ 
            str += '<td>'+letter+'</td>'
            console.log(letter)
        }
    }
    str+= "</table>"
    document.write(str)
}

//For Multiply Table
{
    const arr = [[0,0,0,0,0],[0,1,2,3,4],[0,2,4,6,8],[0,3,6,9,12],[0,4,8,12,16]]
    let   str = "<table border='1'>"
    let   i   = 0
    for (let currency of arr){
        str += '<tr>'+currency+'</tr>'
        console.log(currency)
        for (let letter of currency){
            str += '<td>'+letter+'</td>'
            console.log(letter)
        }
    }
    str+= "</table>"
    document.write(str)
}

//Function Capitalize
{
    const capitalize = str => {
        let result
        result=str[0].toUpperCase()+str.toLowerCase().slice(1)
        return result //именно этот код обеспечит возврат результата функции
    }
    console.log(capitalize("cANBerRa")) //Canberra
}

//Map Capitalize
{
    const capitalize = str => {
        let result
        result=str[0].toUpperCase()+str.toLowerCase().slice(1)
        return result //именно этот код обеспечит возврат результата функции
    }
    str = prompt('Введите строку').split(' ')
    arr = str.map(capitalize).join(' ')
    alert(arr)
}

//Beep Lexics
{
    const motherWord = ['дурак']
    const arr = prompt('Введите строку').split(' ')
    let resultArr = arr.map(x => x===motherWord[0] ?x='BEEP':x=x).join(' ')//понимаю что это не решение, но ничего другого не придумал
}


//Reduce HTML
{
    const currencies = ["","USD", "EUR", "GBP", "UAH"]
    let str          = "<select>"
    str             += currencies.reduce( (a,b) => a+'<option>'+b+'</option>' )
    str             += "</select>"
    document.write(str)
}