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[학습일지] 웹개발 1-14 ~ 1-20 (javascript 기초)

wanny_h 2022. 7. 1. 14:03

앞서 해본 HTML, CSS는 각각 뼈대와 꾸미기를 담당했다면, 이번에 배울 JS는 웹페이지의 동작을 하게 만드는 언어이다.

이번 시간에는 JS에서 쓰이는 기본적인 코드를 배워보았다.

 

코드작성은 html형식의 파일에서하고, 코드 실행은 크롬의 콘솔탭에서 했다.

function is_adult(age) {
    if (age >= 20) {
        console.log('성인입니다.')
    }
    else {console.log('청소년 입니다.')
    }
}

 

// 반복문
let a_list = ['사과', '배', '감', '딸기']
for (let i = 0; i < a_list.length; i++) {
    console.log(a_list[i])
}

 

let scores = [
    {'name': '철수', 'score': 90},
    {'name': '영희', 'score': 85},
    {'name': '민수', 'score': 70},
    {'name': '형준', 'score': 50},
    {'name': '기남', 'score': 68},
    {'name': '동희', 'score': 30},
]

for (let i = 0; i < scores.length; i++) {
//    console.log(scores[i]['score'])
    if (scores[i]['score'] > 70) {
        console.log(scores[i]['name'])
    }
}

 

 

        // 서울시의 미세먼지 40이하의 지역 추려내기
        let mise_list = [
  {
    MSRDT: "201912052100",
    MSRRGN_NM: "도심권",
    MSRSTE_NM: "중구",
    PM10: 22,
    PM25: 14,
    O3: 0.018,
    NO2: 0.015,
    CO: 0.4,
    SO2: 0.002,
    IDEX_NM: "좋음",
    IDEX_MVL: 31,
    ARPLT_MAIN: "O3",
  },
  {
    MSRDT: "201912052100",
    MSRRGN_NM: "도심권",
    MSRSTE_NM: "종로구",
    PM10: 24,
    PM25: 18,
    O3: 0.013,
    NO2: 0.016,
    CO: 0.4,
    SO2: 0.003,
    IDEX_NM: "좋음",
    IDEX_MVL: 39,
    ARPLT_MAIN: "PM25",
  },
  {
    MSRDT: "201912052100",
    MSRRGN_NM: "도심권",
    MSRSTE_NM: "용산구",
    PM10: 0,
    PM25: 15,
    O3: 0.012,
    NO2: 0.027,
    CO: 0.4,
    SO2: 0.003,
    IDEX_NM: "점검중",
    IDEX_MVL: -99,
    ARPLT_MAIN: "점검중",
  },
  {
    MSRDT: "201912052100",
    MSRRGN_NM: "서북권",
    MSRSTE_NM: "은평구",
    PM10: 36,
    PM25: 14,
    O3: 0.019,
    NO2: 0.018,
    CO: 0.5,
    SO2: 0.005,
    IDEX_NM: "좋음",
    IDEX_MVL: 42,
    ARPLT_MAIN: "PM10",
  },
  {
    MSRDT: "201912052100",
    MSRRGN_NM: "서북권",
    MSRSTE_NM: "서대문구",
    PM10: 28,
    PM25: 9,
    O3: 0.018,
    NO2: 0.015,
    CO: 0.6,
    SO2: 0.004,
    IDEX_NM: "좋음",
    IDEX_MVL: 37,
    ARPLT_MAIN: "PM10",
  },
  {
    MSRDT: "201912052100",
    MSRRGN_NM: "서북권",
    MSRSTE_NM: "마포구",
    PM10: 26,
    PM25: 8,
    O3: 0.012,
    NO2: 0.021,
    CO: 0.5,
    SO2: 0.003,
    IDEX_NM: "좋음",
    IDEX_MVL: 36,
    ARPLT_MAIN: "NO2",
  },
  {
    MSRDT: "201912052100",
    MSRRGN_NM: "동북권",
    MSRSTE_NM: "광진구",
    PM10: 17,
    PM25: 9,
    O3: 0.018,
    NO2: 0.016,
    CO: 0.6,
    SO2: 0.001,
    IDEX_NM: "좋음",
    IDEX_MVL: 31,
    ARPLT_MAIN: "O3",
  },
  {
    MSRDT: "201912052100",
    MSRRGN_NM: "동북권",
    MSRSTE_NM: "성동구",
    PM10: 21,
    PM25: 12,
    O3: 0.018,
    NO2: 0.017,
    CO: 0.4,
    SO2: 0.003,
    IDEX_NM: "좋음",
    IDEX_MVL: 33,
    ARPLT_MAIN: "PM25",
  },
  {
    MSRDT: "201912052100",
    MSRRGN_NM: "동북권",
    MSRSTE_NM: "중랑구",
    PM10: 27,
    PM25: 10,
    O3: 0.015,
    NO2: 0.019,
    CO: 0.4,
    SO2: 0.003,
    IDEX_NM: "좋음",
    IDEX_MVL: 34,
    ARPLT_MAIN: "PM10",
  },
  {
    MSRDT: "201912052100",
    MSRRGN_NM: "동북권",
    MSRSTE_NM: "동대문구",
    PM10: 26,
    PM25: 9,
    O3: 0.016,
    NO2: 0.017,
    CO: 0.4,
    SO2: 0.003,
    IDEX_NM: "좋음",
    IDEX_MVL: 34,
    ARPLT_MAIN: "PM10",
  },
  {
    MSRDT: "201912052100",
    MSRRGN_NM: "동북권",
    MSRSTE_NM: "성북구",
    PM10: 27,
    PM25: 8,
    O3: 0.022,
    NO2: 0.014,
    CO: 0.5,
    SO2: 0.003,
    IDEX_NM: "좋음",
    IDEX_MVL: 37,
    ARPLT_MAIN: "PM10",
  },
  {
    MSRDT: "201912052100",
    MSRRGN_NM: "동북권",
    MSRSTE_NM: "도봉구",
    PM10: 25,
    PM25: 12,
    O3: 0.024,
    NO2: 0.011,
    CO: 0.3,
    SO2: 0.002,
    IDEX_NM: "좋음",
    IDEX_MVL: 41,
    ARPLT_MAIN: "O3",
  },
  {
    MSRDT: "201912052100",
    MSRRGN_NM: "동북권",
    MSRSTE_NM: "강북구",
    PM10: 30,
    PM25: 15,
    O3: 0.022,
    NO2: 0.02,
    CO: 0.4,
    SO2: 0.002,
    IDEX_NM: "좋음",
    IDEX_MVL: 39,
    ARPLT_MAIN: "PM10",
  },
  {
    MSRDT: "201912052100",
    MSRRGN_NM: "동북권",
    MSRSTE_NM: "노원구",
    PM10: 21,
    PM25: 14,
    O3: 0.017,
    NO2: 0.016,
    CO: 0.4,
    SO2: 0.004,
    IDEX_NM: "좋음",
    IDEX_MVL: 36,
    ARPLT_MAIN: "PM25",
  },
  {
    MSRDT: "201912052100",
    MSRRGN_NM: "서남권",
    MSRSTE_NM: "강서구",
    PM10: 36,
    PM25: 16,
    O3: 0.021,
    NO2: 0.013,
    CO: 0.4,
    SO2: 0.004,
    IDEX_NM: "좋음",
    IDEX_MVL: 42,
    ARPLT_MAIN: "PM10",
  },
  {
    MSRDT: "201912052100",
    MSRRGN_NM: "서남권",
    MSRSTE_NM: "구로구",
    PM10: 23,
    PM25: 10,
    O3: 0.022,
    NO2: 0.016,
    CO: 0.3,
    SO2: 0.003,
    IDEX_NM: "좋음",
    IDEX_MVL: 37,
    ARPLT_MAIN: "O3",
  },
  {
    MSRDT: "201912052100",
    MSRRGN_NM: "서남권",
    MSRSTE_NM: "영등포구",
    PM10: 29,
    PM25: 15,
    O3: 0.01,
    NO2: 0.022,
    CO: 0.4,
    SO2: 0.003,
    IDEX_NM: "좋음",
    IDEX_MVL: 41,
    ARPLT_MAIN: "PM10",
  },
  {
    MSRDT: "201912052100",
    MSRRGN_NM: "서남권",
    MSRSTE_NM: "동작구",
    PM10: 29,
    PM25: 15,
    O3: 0.012,
    NO2: 0.023,
    CO: 0.4,
    SO2: 0.003,
    IDEX_NM: "좋음",
    IDEX_MVL: 41,
    ARPLT_MAIN: "PM10",
  },
  {
    MSRDT: "201912052100",
    MSRRGN_NM: "서남권",
    MSRSTE_NM: "관악구",
    PM10: 27,
    PM25: 12,
    O3: 0.012,
    NO2: 0.022,
    CO: 0.4,
    SO2: 0.003,
    IDEX_NM: "좋음",
    IDEX_MVL: 37,
    ARPLT_MAIN: "NO2",
  },
  {
    MSRDT: "201912052100",
    MSRRGN_NM: "서남권",
    MSRSTE_NM: "금천구",
    PM10: 25,
    PM25: 15,
    O3: 0.015,
    NO2: 0.02,
    CO: 0.4,
    SO2: 0.004,
    IDEX_NM: "좋음",
    IDEX_MVL: 43,
    ARPLT_MAIN: "PM25",
  },
  {
    MSRDT: "201912052100",
    MSRRGN_NM: "서남권",
    MSRSTE_NM: "양천구",
    PM10: 0,
    PM25: 14,
    O3: 0.016,
    NO2: 0.017,
    CO: 0.4,
    SO2: 0.003,
    IDEX_NM: "점검중",
    IDEX_MVL: -99,
    ARPLT_MAIN: "점검중",
  },
  {
    MSRDT: "201912052100",
    MSRRGN_NM: "동남권",
    MSRSTE_NM: "강남구",
    PM10: 31,
    PM25: 16,
    O3: 0.018,
    NO2: 0.018,
    CO: 0.4,
    SO2: 0.003,
    IDEX_NM: "좋음",
    IDEX_MVL: 39,
    ARPLT_MAIN: "PM10",
  },
  {
    MSRDT: "201912052100",
    MSRRGN_NM: "동남권",
    MSRSTE_NM: "서초구",
    PM10: 34,
    PM25: 13,
    O3: 0.024,
    NO2: 0.019,
    CO: 0.3,
    SO2: 0.003,
    IDEX_NM: "좋음",
    IDEX_MVL: 41,
    ARPLT_MAIN: "PM10",
  },
  {
    MSRDT: "201912052100",
    MSRRGN_NM: "동남권",
    MSRSTE_NM: "송파구",
    PM10: 25,
    PM25: 6,
    O3: 0.014,
    NO2: 0.025,
    CO: 0.4,
    SO2: 0.003,
    IDEX_NM: "좋음",
    IDEX_MVL: 42,
    ARPLT_MAIN: "NO2",
  },
  {
    MSRDT: "201912052100",
    MSRRGN_NM: "동남권",
    MSRSTE_NM: "강동구",
    PM10: 24,
    PM25: 14,
    O3: 0.016,
    NO2: 0.02,
    CO: 0.4,
    SO2: 0.002,
    IDEX_NM: "좋음",
    IDEX_MVL: 39,
    ARPLT_MAIN: "PM25",
  },
];

        for (let i = 0; i < mise_list.length; i++) {
            if (mise_list[i]["IDEX_MVL"] < 40) {
                console.log(mise_list[i]["MSRSTE_NM"])
            }
        }

 

REVIEW

자바스크립트에 대해서 조금 알게 되었고, 함수의 정의와 반복문에 대해서 연습할 수 있었다.

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