for-in
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let jiro = { name : "jiro" , age : 28 };
for( const key in jiro ){
console.log(key + '：' + jiro[key]);
}
let members = {
jiro11tanaka: { name: 'jiro', age: 28 },
yuko0yoshida: { name: 'yuko', age: 22 },
hiyoko: { name: 'hiyoko', age: 18 },
24568: { name: 'even', age: 28 },
16729: { name: 'prime', age: 28 }
}
for( const key in members ){
console.log(key);
console.log(members[key]);
}
JavaScript
INFO