unique

Remove duplicates from an array

Usage

Given an array of items — and optionally, a function to determine their identity — return a new array without any duplicates.

The function does not preserve the original order of items.

import * as 
import _
_ from 'radashi'

const 
const fish: {
    name: string;
    weight: number;
    source: string;
}[]
fish = [
  {
    
name: string
name: 'Marlin',
    
weight: number
weight: 105,
    
source: string
source: 'ocean',
  },
  {
    
name: string
name: 'Salmon',
    
weight: number
weight: 22,
    
source: string
source: 'river',
  },
  {
    
name: string
name: 'Salmon',
    
weight: number
weight: 22,
    
source: string
source: 'river',
  },
]

import _
_.
unique<{
    name: string;
    weight: number;
    source: string;
}, string>(array: readonly {
    name: string;
    weight: number;
    source: string;
}[], toKey?: ((item: {
    name: string;
    weight: number;
    source: string;
}) => string) | undefined): {
    name: string;
    weight: number;
    source: string;
}[]
export unique
Given a list of items returns a new list with only unique items.
Accepts an optional identity function to convert each item in the
list to a comparable identity value.
@see ― https://radashi.js.org/reference/array/unique
@example 
unique([1, 1, 2, 2]) // => [1, 2]
unique([1, 2, 3], (n) => n % 2) // => [1, 2]
@version ― 12.1.0
unique(
const fish: {
    name: string;
    weight: number;
    source: string;
}[]
fish, 
f: {
    name: string;
    weight: number;
    source: string;
}
f => 
f: {
    name: string;
    weight: number;
    source: string;
}
f.
name: string
name)
// [
//     { name: 'Marlin', weight: 105, source: 'ocean' },
//     { name: 'Salmon', weight: 22, source: 'river' }
// ]