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"]

Answer 1

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)

Answer 2

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

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