javascriptBasic/02_array.html at master · YoungjuneKim/javascriptBasic · GitHub

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<!DOCTYPE html>
<html lang="ko">
<head>
    <meta charset="UTF-8">
    <title>HTML Intro</title>
</head>

<script>
    //Boolean, Number, String, Array, Object 5가지타입

    //array
    var nums = new Array() ;
    nums.push(5) ;
    nums.push(15) ;
    console.log(nums) ;
    nums.push(115) ;
    console.log(nums) ;

    var n1 = nums.pop() ;
    console.log("n1:"+n1) ;
    console.log("nums", nums) ;  //last in first out(Stack)

    var nums2 = new Array() ;
    nums2[0] =3 ;
    nums2[1] =13 ;
    nums2[2] =113 ;
    console.log(nums2[1]) ;
    console.log("nums2", nums2) ;

    var nums3 = new Array() ;
    nums3[5] = 11119
    console.log("nums3", nums3) ;
    console.log("nums3.length", nums3.length) ;

    // array
    var str1  = new Array() ;
    var str2  = new Array(5) ;
    var str3  = new Array(5,10,21) ; //array 초기화
    var str4  = new Array(5,10,21, "hello") ; //array 초기화
    console.log("typeof :", typeof str4[4-1] ) ;

    var str5  = new Array(5,10,21, "hello", new Array(2,3,4)) ;
    console.log("str5_1: ", str5) ;
    console.log("str5[4][1]: ", str5[4][1]) ;
    //str5.splice(1) ;     //1번째이후 다 삭제
    str5.splice(1,1) ;  //1번째 이후 1개만 삭제
    //str5.splice(1,2) ;  //1번째 이후 2개만 삭제
    console.log("str5_2: ", str5) ;

    str5.splice(2,1, "hi!") ;  //2번째 이후 1개만 삭제하고 "hi!"을 삽입
    console.log("str5_3: ", str5) ;
    str5.splice(2,0, "hihi!") ;  //2번째 이후  "hihi!"을 삽입
    console.log("str5_4: ", str5) ;

</script>

<body>
    <h1>여러분을 환영합니다!!</h1>
</body>
</html>