JavaScript: Retrieve all the names of object's own and inherited properties

JavaScript Object: Exercise-13 with Solution

Object Properties (Own & Inherited)

Write a JavaScript function to retrieve all the names of an object's own and inherited properties.

Sample Solution: -

JavaScript Code:

function allKeys(obj) {
    if (!isObject(obj)) return [];
    var keys = [];
    for (var key in obj) keys.push(key);
    return keys;
}
function isObject(obj) 
{
    var type = typeof obj;
    return type === 'function' || type === 'object' && !!obj;
  }
function Student(name) {
  this.name = name;
}
Student.prototype.rollno = true;
console.log(allKeys(new Student("Sara")));

Output:

["name","rollno"]

Flowchart:

Live Demo:

See the Pen javascript-object-exercise-13 by w3resource (@w3resource) on CodePen.

For more Practice: Solve these Related Problems:

• Write a JavaScript function that retrieves all own and inherited property names from an object using a for...in loop.
• Write a JavaScript function that distinguishes between an object's own properties and those inherited from its prototype.
• Write a JavaScript function that lists all property names, including non-enumerable ones, from a given object.
• Write a JavaScript function that returns an object with two arrays: one for own properties and one for inherited properties.

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