loop key in object
// object to loop through
let obj = { first: "John", last: "Doe" };
// loop through object and log each key and value pair
//ECMAScript 5
Object.keys(obj).forEach(function(key) {
console.log(key, obj[key]);
});
//ECMAScript 6
for (const key of Object.keys(obj)) {
console.log(key, obj[key]);
}
//ECMAScript 8
Object.entries(obj).forEach(
([key, value]) => console.log(key, value)
);
// OUTPUT
/*
first John
last Doe
*/const fruits = { apple: 28, orange: 17 }
for(key in fruits){
console.log(key)
}const fruits = {
apple: 28,
orange: 17,
pear: 54,
}
const keys = Object.keys(fruits)
console.log(keys) // [apple, orange, pear]
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