javascript

 
    ['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(-2);            // ['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']
    ['j','a','v','a','s','c','r','i','p','t'].slice(-3, -4)         // X

    "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
    "javascript".slice(-3,-1);        //ip
    "javascript".slice(-3,-2);        //i


    console.log("javascript".slice(0));

  ['java','script','refer','ence'].splice(1);                    //['script','refer','ence']
    ['java','script','refer','ence'].splice(2);                    //['refer','ence']
    ['java','script','refer','ence'].splice(3);                    //['ence']
    ['java','script','refer','ence'].splice(1, 2);                 //['script','refer']
    ['java','script','refer','ence'].splice(1, 3);                 //['script','refer','ence']

    const str = ['java','script','refer','ence'];
    const result = str.splice(1, 3, "react");

    console.log(str);           //['java', 'react']
    console.log(result);        //['script', 'refer', 'ence']

    const arrNum1 = [100, 200, 300, 400, 500];
    const result1 = arrNum1.splice(1);                //0부터 1개의배열을 삭제

    console.log(result1);                            //[100] 삭제한 값
    console.log(arrNum1);                            //[200, 300, 400, 500] 결과값

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

    console.log(result2);                            //[200, 300] 삭제한 값
    console.log(arrNum2);                            //[100, 400, 500] 결과값
    
    const arrNum3 = [100, 200, 300, 400, 500];
    const result3 = arrNum3.splice(1, 4);                //1부터 4개의배열을 삭제

    console.log(result3);                            //[200, 300, 400, 500] 삭제한 값
    console.log(arrNum3);                            //[100] 결과값

    const arrNum4 = [100, 200, 300, 400, 500];
    const result4 = arrNum4.splice(1, 2, "javascript");                //1부터 2개의배열을 삭제

    console.log(result4);                            //[200, 300] 삭제한 값
    console.log(arrNum4);                            //[100, 'javascript', 400, 500] 결과값

    const arrNum5 = [100, 200, 300, 400, 500];
    const result5 = arrNum5.splice(1, 0, "javascript");                //1부터 0개의배열을 삭제

    console.log(result5);                            //[] 삭제한 값
    console.log(arrNum5);                            //[100, 'javascript', 200, 300, 400, 500] 결과값

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

    console.log(result6);                            //[100, 200, 300, 400] 삭제한 값
    console.log(arrNum6);                            //['javascript', 500] 결과값

    const arrNum7 = [100, 200, 300, 400, 500];
    const result7 = arrNum7.splice(2, 2, "javascript", "react");                //2부터 2개의배열을 삭제

    console.log(result7);                            //[300, 400] 삭제한 값
    console.log(arrNum7);                            //[100, 200, 'javascript', 'react', 500] 결과값
    
    const arrNum8 = [100, 200, 300, 400, 500];
    const result8 = arrNum8.splice(-2, 2, "javascript");                //-라서 뒤에서부터 2부터 2개의배열을 삭제

    console.log(result8);                            //[400, 500] 삭제한 값
    console.log(arrNum8);                            //[100, 200, 300, 'javascript'] 결과값