Find and add extra key in object of array using lodash?

Question

I want to find and add extra key in object of array using lodash. I don't want to do in for loop and maintain in temp data.

"book": [
  {
    "name": "Hulk",
    "series": [
      {
        "name": "mike",
        "id": "100",
      },
      {
        "name": "steve",
        "id": "200"
      }
    ]
  }
],

Need to add detail object inside series array based on name: mike && id:100 search and return the complete book data.

{
  "name": "mike",
  "id": "100",
  "detail":{
    "author": 'apple'
    "year": 1956
  }
},

Rialgar · Accepted Answer · 2018-05-25 12:47:56Z

1

like this? (note: this modifies the existing object)

const list = [
  {
    "name": "Hulk",
    "series": [
      {
        "name": "mike",
        "id": "100",
      },
      {
        "name": "steve",
        "id": "200"
      }
    ]
  }
];

function addDetail(books, search, detail){
  books.forEach(book => {
    var entry = book.series.find( item => {
      return item.name === search.name && item.id === search.id;
    });
    if(entry){
      entry.detail=detail;
    }
  })
  return books;
}

console.log(addDetail(list, {"name": "mike","id": "100"}, { "author": 'apple', "year": 1956}))

.as-console-wrapper { max-height: 100% !important; top: 0; }

You can replace the arrow syntax with the usual function syntax and use lodash for the forEach and the find to increase compatability with older browser versions.

answered May 25, 2018 at 12:47

Rialgar

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