filter the objects with array using ES6

Question

How to find the length of the ARRAY using ES6:

var x = [{a:"apple", b:"Baloon"},{a:"elephant", b:"dog"}];

var results = x.filter(aValue => aValue.length > 3);

console.log(results);

Note: aValue.length would have worked if this is individual list of array. However, since these are values assigned to properties. Ex; a: apple, diff approach required.

What's the correct code that I need to replace "aValue.length" to find the length of the value greater than 3, so the answer would be apple, baloon and elephant ?

Christopher Messer · Accepted Answer · 2017-08-29 18:35:30Z

5

This will work for your needs

var results = x.filter(val => Object.keys(val).length > 3)

The Object.keys() method returns an array of all the keys contained in your object.

answered Aug 29, 2017 at 18:35

Christopher Messer

2,09011 silver badges13 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

thirdEye Over a year ago

this is not an object. this an array. Have u had a chance to run the code using your solution ?

Christopher Messer Over a year ago

It's an array of objects. Yes, the solution works, it grabs the Object.keys() of each object inside of your array. What trouble are you running into?

rootkill · Accepted Answer · 2017-08-29 18:43:45Z

2

Objects do not have a length property. But there is a little trick with which you can have the number of keys of an object.

There are 2 methods that can be used. Object.getOwnPropertyNames(val).length and Object.keys(val).length

However, there is a little difference between the two. Object.getOwnPropertyNames(a) returns all own properties of the object a. Object.keys(a) returns all enumerable own properties.

answered Aug 29, 2017 at 18:43

rootkill

6296 silver badges11 bronze badges

Collectives™ on Stack Overflow

filter the objects with array using ES6

2 Answers 2

2 Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

2 Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related