Javascript Object.entries() Method


In JavaScript, the objects behave like a datatype, and store the data such as values, keys, etc. Object.entries() method is a built-in function of JavaScript. It is used to return the new array with the elements having the corresponding attributes to countable string-keyed properties. However, this method doesn’t convert the innovador array.

In the JavaScript Object.entries() method, the arrangement of the properties is the same as if you looped over the values manually. All the modern browsers support the object.entries() method except for Internet Explorer as it is the feature of ECMA 6. This article will provide you with a descriptive knowledge of the following outcomes:

  • How Object.entries() method works in JavaScript
  • How to use the Object.entries() method in JavaScript

How JavaScript Object.entries() method works

The JavaScript Object.entries() method accesses the properties and returns specified keys as a string in an object. Any specified key can be attained using the index of an array.

Syntax
The JavaScript Object.entries() method works on the following syntax.

Here, ‘obj’ is a parameter whose countable property pairs are to be returned.

The Object.entries() method returns all enumerable property pairs [keys, values] as a string.

If the entered key does not belong to the data in the object, the Object.entries() does not return the value. The Object.entries method is also applied on arrays as array is also a data type.

How to use Object.entries() method in JavaScript

The JavaScript Object.entries() method takes an argument as an input and outputs an array of the object’s countable pair of properties. This section represents the usage of the Object.entries() method with examples.

Example: How Object.entries() method converts the object into enumerable array property
The Object.entries() method takes an object and converts it into the countable array property. In this example, we will learn how to convert the object using the Object.entries() method.

employee = {
    ‘TalhaSaif Inc’: 60,
    ‘LinuxHint’: 100,
    ‘Comsats’: 360 };
console.log(Object.entries(employee));

In this example, an object ‘employee’ is created with the values passed in a specified order. When the Object.entries()  function calls, it will return the array with the countable properties.

The returned output showed that the object ‘employee’ has countable string-keyed properties in an array form.

Example: How Object.entries() access a specific property object
The Object.entries() method can also access the specified property in the given array using the index number. In this example, you will learn how this function gets a specified property.

employee = {
    ‘TalhaSaif Inc’: 60,
    ‘LinuxHint’: 100,
    ‘Comsats’: 360 };

console.log(Object.entries(employee)[1]);

In this code, an object  ‘employee’ is created with the values in specified order. Here, [1] represents the index number of an array. When a function is called, it will return the specified property of the given index number in an array.

The returned output showed the countable property ‘’[‘LinuxHint’, 100]” of the specified index of an array.

Conclusion

Object.entries() method is a built-in function of JavaScript that returns the new array with the elements having the corresponding attributes to countable string-keyed properties. This tutorial provided a complete guide about JavaScript Object.entries() method. For better understanding, we illustrated the working, properties, and usage of the Object.entries() method in JavaScript using suitable examples.



Source link