javascript

{
    const 배열 = ['사과', '바나나', '오렌지'];
    const 결과 = 배열.join(', ');
    
    console.log(결과); // 출력 결과: "사과, 바나나, 오렌지"
}

{
    ['j','a','v','a','s','c','r','i','p','t'].slice(0); //['j', 'a', 'v', 'a', 's', 'c', 'r', 'i', 'p', 't']
    ['j','a','v','a','s','c','r','i','p','t'].slice(1); //['a', 'v', 'a', 's', 'c', 'r', 'i', 'p', 't']
    ['j','a','v','a','s','c','r','i','p','t'].slice(2); //['v', 'a', 's', 'c', 'r', 'i', 'p', 't']
    ['j','a','v','a','s','c','r','i','p','t'].slice(0, 1);  //['j']
    ['j','a','v','a','s','c','r','i','p','t'].slice(1, 2);  //['a']
    ['j','a','v','a','s','c','r','i','p','t'].slice(0, 2);  //['j', 'a']
    ['j','a','v','a','s','c','r','i','p','t'].slice(0, 3);  //['j', 'a', 'v']
    ['j','a','v','a','s','c','r','i','p','t'].slice(5, 10);  //['c', 'r', 'i', 'p', 't']
    ['j','a','v','a','s','c','r','i','p','t'].slice(5, -1);  //['c', 'r', 'i', 'p']
    ['j','a','v','a','s','c','r','i','p','t'].slice(5, -2);  //['c', 'r', 'i']
    ['j','a','v','a','s','c','r','i','p','t'].slice(-1);  //['t']
    ['j','a','v','a','s','c','r','i','p','t'].slice(-2);  //['p', 't']
    ['j','a','v','a','s','c','r','i','p','t'].slice(-3);  //['i', 'p', 't']
    ['j','a','v','a','s','c','r','i','p','t'].slice(-3, -1);  //['i', 'p']
    ['j','a','v','a','s','c','r','i','p','t'].slice(-3, -2);  //['i']

    "javascript".slice(0);   //javascript
    "javascript".slice(1);   //avascript
    "javascript".slice(2);   //vascript
    "javascript".slice(0, 1);   //j
    "javascript".slice(1, 2);   //a
    "javascript".slice(0, 2);   //ja
    "javascript".slice(0, 3);   //jav
    "javascript".slice(5, 10);   //cript
    "javascript".slice(5, -1);   //crip
    "javascript".slice(5, -2);   //cri
    "javascript".slice(-1);   //t
    "javascript".slice(-2);   //pt
    "javascript".slice(-3);   //ipt
}

{
    const arrNum1 = [100, 200, 300, 400, 500];
    const result1 = arrNum1.splice(1);
    console.log(arrNum1);    //[100]
    console.log(result1);    //[200, 300, 400, 500]

    const arrNum2 = [100, 200, 300, 400, 500];
    const result2 = arrNum2.splice(1, 2);
    console.log(arrNum2);   //[100, 400, 500]
    console.log(result2);   //[200, 300]

    const arrNum3 = [100, 200, 300, 400, 500];
    const result3 = arrNum3.splice(1, 4);
    console.log(arrNum3);   //[100]
    console.log(result3);   //[200, 300, 400, 500]

    const arrNum4 = [100, 200, 300, 400, 500];
    const result4 = arrNum4.splice(1, 2, "javascript");
    console.log(arrNum4);   //[100, 'javascript', 400, 500]
    console.log(result4);   //[200, 300]

    const arrNum5 = [100, 200, 300, 400, 500];
    const result5 = arrNum5.splice(1, 0, "javascript");
    console.log(arrNum5);   //[100, 'javascript', 200, 300, 400, 500]
    console.log(result5);   //[]

    const arrNum6 = [100, 200, 300, 400, 500];
    const result6 = arrNum6.splice(0, 4, "javascript");
    console.log(arrNum6);   //["javascript", 500]
    console.log(result6);   //[100, 200, 300, 400]

    const arrNum7 = [100, 200, 300, 400, 500];
    const result7 = arrNum7.splice(2, 2, "javascript","react");
    console.log(arrNum7);   //[100, 200, 'javascript', 'react', 500]
    console.log(result7);   //[300, 400]

    const arrNum8 = [100, 200, 300, 400, 500];
    const result8 = arrNum8.splice(-2, 2, "javascript");
    console.log(arrNum8);   //[100, 200, 300, 'javascript']
    console.log(result8);   //[400, 500]
}