Check all object values inside Array javascript has boolean false

Question

I have below object inside array

    [
    {
        "age":32,
        "test":true
    },
    {
        "age":33,
        "test":true
    },
    {
        "age":35,
        "test":false
    }
]

I need to check if all values of test is false.

I have tried below code

Array.isArray(obj.map((message,index) => {
      if(message.test !== message.test){
          //trigger when all values are false
      }
}))

How to achieve this?

mickl · Accepted Answer · 2018-05-02 15:37:41Z

7

You can use every from Array prototype:

let areAllFalse = array.every(x => x.test === false);

answered May 2, 2018 at 15:37

mickl

50.1k9 gold badges71 silver badges99 bronze badges

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

2 Comments

bugs Over a year ago

Can be shortened to array.every(x => !x.test)

mickl Over a year ago

@bugs possibly can be but he explicitly mentioned to check against false not undefined and other falsy values

Steven Mays · Accepted Answer · 2018-05-02 15:54:41Z

0

You can also you filter from array prototype...

const filtered = array.filter(a => a.test === true)

or the less verbose

const filtered = array.filter(a => a.test)

answered May 2, 2018 at 15:54

Steven Mays

3651 silver badge12 bronze badges

2 Comments

Steven Mays Over a year ago

if (filtered) { ... }

Matt Over a year ago

So you just told me how you would tell if they were all false, you might want to add that to the answer as OP seems new and may not know that. Because right now you are showing how to filter an array without answering the question and helping OP learn.

Collectives™ on Stack Overflow

Check all object values inside Array javascript has boolean false

2 Answers 2

2 Comments

2 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

2 Comments

2 Comments

Your Answer

Sign up or log in

Post as a guest

Related