javascriptlodash

How can I insert a specific index in an array using Lodash?

I already see the Lodash documentation, but what function do I need to use to solve my problem? I have an array,

const arr = [
  {name: 'john'},
  {name: 'jane'},
  {name: 'saske'},
  {name: 'jake'},
  {name: 'baki'}
]

I want to add {name: 'ace'} before 'saske'. I know about splice in JavaScript, but I want to know if this is possible in Lodash.

Solution

  • You can try something like this:

    const arr = [{
    name: 'john'
  },
  {
    name: 'jane'
  },
  {
    name: 'saske'
  },
  {
    name: 'jake'
  },
  {
    name: 'baki'
  }
]

const insert = (arr, index, newItem) => [
  ...arr.slice(0, index),

  newItem,

  ...arr.slice(index)
];

const newArr = insert(arr, 2, {
  name: 'ace'
});

console.log(newArr);