How to filter array in javascript

Question

Here is my array of two values .

let dataList = ["x","y","z","a","b"]
let data2= {
  x:{hide:true},
  y:{hide:true},
  z:{},
  a:{}
}

here is my trying code:

let filters = dataList.filter(item=>Object.keys(data2).includes(item))

I want to filter dataList based data2 - hide:true . For example, if values object property hide:true inside data2 , key will be removed .

expected output :

["z","a"]

mplungjan · Accepted Answer · 2020-04-24 09:03:15Z

2

I believe it is a simple as this

let dataList = ["x","y","z","a","b"]
let data2= {
  x:{hide:true},
  y:{hide:true},
  z:{},
  a:{}
}

let filters = dataList.filter(item=> data2[item] && !data2[item].hide)

console.log(filters)

answered Apr 24, 2020 at 9:03

mplungjan

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Comments

Radu Diță · Accepted Answer · 2020-04-24 09:02:39Z

1

You can check if the key exists on data2 and check for hide to be true

dataList.filter(item => data2[item] && !data2[item].hide )

answered Apr 24, 2020 at 9:02

Radu Diță

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2 Comments

mplungjan Over a year ago

You beat me by 30 seconds, because of my snippet ;)

Radu Diță Over a year ago

yeah, no snippets for me :)

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