30.オブジェクトの書き込みと読み取り

オブジェクトの作成

var coworkers = {
      "programmer": "egoing",
      "designer": "leezche"
    };

オブジェクトの操作

    document.write("programmer : " + coworkers.programmer + "<br>")
    document.write("designer : " + coworkers.designer + "<br>")

オブジェクトへの情報の追加

  coworkers.bookeeper = "duru";
    document.write("bookeeper : " + coworkers.bookeeper + "<br>");
    coworkers["data scientist"] = "taeho";
    document.write("data scientist : " + coworkers["data scientist"] + "<br>");

31.対象と複文

javascript object iteration

for (var key in coworkers) {
      document.write(key+'<br>');
    }

  for (var key in coworkers) {
      document.write(coworkers[key]+'<br>');
    }

for (var key in coworkers) {
      document.write(key + ' : ' + coworkers[key] + '<br>');
    }

32.オブジェクトの構成と方法