How to use find() with findIndex in JavaScript

Question

I have a small problem regarding Array to find Elements using find() with findIndex. I have demo code which is worked when I am using only find() method with my array variable.

    var a = [{
      _id: 'newlead',
      count: 45
    }, {
      _id: 'contact',
      count: 12
    }, {

    leadCount: [{
          _id: 'newlead',
          count: 45
        }, {
          _id: 'contact',
          count: 12
        }]
    }]

var findElement = a.find(a => {
  return a._id === 'newlead'
});

console.log(findElement);

The actual problem is I want to check in an array, 'leadCount' is exist or not, if exist then I am doing this, I have a code. this code throws an error "TypeError: a.findIndex(...).find is not a function

let data = a.findIndex( element => {
  return 'leadCount' in element
}).find(e => {
    return e._id === 'newlead'
})

console.log(data)

Please suggest me the right thing.

thank you

I need this object inside data variable { _id: 'newlead', count: 45 } — kusama
– kusama, Commented Jun 28, 2018 at 10:35

Swati Anand · Accepted Answer · 2018-06-28 10:50:54Z

3

You can try this:

 var a = [{
  _id: 'newlead',
  count: 45
}, {
  _id: 'contact',
  count: 12
}, {

leadCount: [{
      _id: 'newlead',
      count: 45
    }, {
      _id: 'contact',
      count: 12
    }]
}];



let data = a.find(e => 'leadCount' in e) || {leadCount: []}.leadCount.find(e => e._id === 'newlead')

console.log(data)

edited Jun 28, 2018 at 10:50

answered Jun 28, 2018 at 10:42

Swati Anand

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