What is a memory-saving method to clear an object in JavaScript?

Question

What is a memory-saving method to clear an object in JavaScript?

I am looking for a way to use the same object repeatedly in JavaScript by emptying it after its purpose is served, without creating a new object each time. In arrays, I usually do arr.length=0 to clear an array instead of assigning it to a new memory location. Is there a similar method to empty an object in JavaScript?
Scenario:

var obj = {};
obj["name"]="Aman";
obj["country"]="India";
console.log(obj); // output is { name: 'Aman', country: 'India' }

Is there a way to reuse this obj after clearing its contents? If so, how can it be done?

javascript json

Answer 1

Answer №1

To remove all properties from an object, one method is to iterate through the object and delete each property individually.

var obj = {};
obj["name"]="Aman";
obj["country"]="India";

for (var prop in obj) {
    // You may want to include a hasOwnProperty check depending on your requirements
    delete obj[prop];
}

console.log(obj);

Alternatively, if you don't have multiple references to the object, you can simply assign it a new empty object.

var obj = {};
obj["name"]="Aman";
obj["country"]="India";

obj = {};

console.log(obj);

Answer 2

To remove all properties from an object, one method is to iterate through the object and delete each property individually.

var obj = {};
obj["name"]="Aman";
obj["country"]="India";

for (var prop in obj) {
    // You may want to include a hasOwnProperty check depending on your requirements
    delete obj[prop];
}

console.log(obj);

Alternatively, if you don't have multiple references to the object, you can simply assign it a new empty object.

var obj = {};
obj["name"]="Aman";
obj["country"]="India";

obj = {};

console.log(obj);

Answer 3

Answer №2

Iterate through each property in myObject and delete it if it is a direct property of the object using JavaScript.

Answer 4

Iterate through each property in myObject and delete it if it is a direct property of the object using JavaScript.

Answer 5

Answer №3

Try utilizing ECMAScript 6 Map:

let details = new Map();
details.set("name", "Alice");
details.set("city", "London");
details.clear();

Answer 6

Try utilizing ECMAScript 6 Map:

let details = new Map();
details.set("name", "Alice");
details.set("city", "London");
details.clear();

What is a memory-saving method to clear an object in JavaScript?

Answer №1

Answer №2

Answer №3

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