The unique() method is used to return the all of the unique values in the collection.
Syntax:
collect(array).unique()
Parameters: The collect() method takes one argument that is converted into the collection and then unique() method is applied on it.
Return Value: This method returns all of the unique items in the collection.
Below example illustrate the unique() method in collect.js:
Example 1:
const collect = require('collect.js'); let arr = [1, 2, 3, 4, 5, 4, 3, 2, 1]; const collection = collect(arr); const unique = collection.unique(); let newObject = unique.all(); console.log(newObject); |
Output:
[1, 2, 3, 4, 5]
Example 2:
const collect = require('collect.js'); let obj = [ { name: 'Kripamoy', dob: '03-03-98', section: 'A', score: 94, }, { name: 'Biltu', dob: '23-01-96', section: 'B', score: 85, }, { name: 'Santanu', dob: '23-01-98', section: 'B', score: 98, }, { name: 'chinmoy', dob: '18-08-97', section: 'A', score: 72 } ]; const collection = collect(obj); const unique = collection.unique('section'); let newObject = unique.all(); console.log(newObject); |
Output:
[
{name: "Kripamoy", dob: "03-03-98", score: 94, section: "A"},
{name: "Biltu", dob: "23-01-96", score: 85, section: "B"}
]
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