Collect.js mapInto() Method

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The mapInto() method is used to iterate through the collection elements and instantiate the given class with each element as a constructor.

Syntax:

collect(array).mapInto()

Parameters: The collect() method takes one argument that is converted into the collection and then mapInto() method is applied on it.

Return Value: This method returns the mapped collection elements.

Below example illustrate the mapInto() method in collect.js:

Example 1:

Javascript

const collect = require('collect.js'); 
  
const data = function (name) { 
    this.name = name; 
}; 
  
const arr = ['GFG', 'Geeks', 'zambiatek']; 
  
const collection = collect(arr); 
  
const elements = collection.mapInto(data); 
  
console.log(elements.all());

Output:

[
  data { name: 'GFG' },
  data { name: 'Geeks' },
  data { name: 'zambiatek' }
]

Example 2:

Javascript

const collect = require('collect.js'); 
  
const data = function (name, dob) { 
    this.name = name; 
    this.dob = dob; 
}; 
  
let obj = [ 
    { 
        name: 'Rahul', 
        dob: '25-10-96', 
        section: 'A', 
        score: 98, 
    }, 
    { 
        name: 'Aditya', 
        dob: '25-10-96', 
        section: 'B', 
        score: 96, 
    }, 
    { 
        name: 'Abhishek', 
        dob: '16-08-94', 
        section: 'A', 
        score: 80 
    }, 
    { 
        name: 'Rahul', 
        dob: '19-08-96', 
        section: 'B', 
        score: 77, 
    }, 
]; 
  
const collection = collect(obj); 
  
const objects = collection.mapInto(data); 
  
console.log(objects.all());

Output:

[
  data {
    name: { 
      name: 'Rahul', 
      dob: '25-10-96', 
      section: 'A', 
      score: 98 
    },
    dob: 0
  },
  data {
    name: { 
      name: 'Aditya', 
      dob: '25-10-96', 
      section: 'B', 
      score: 96 },
    dob: 1
  },
  data {
    name: { 
      name: 'Abhishek', 
      dob: '16-08-94', 
      section: 'A', 
      score: 80 
    },
    dob: 2
  },
  data {
    name: { 
      name: 'Rahul', 
      dob: '19-08-96', 
      section: 'B', 
      score: 77 
    },
    dob: 3
  }
]

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