concat

Flattens and filters nullish values from arguments

Usage

The concat function combines multiple values and arrays into a single array, while:

Flattening nested arrays one level deep
Filtering out null and undefined values
Preserving the type information of the remaining values

Other falsy values (e.g. 0, false, '', NaN) are preserved.

import { 
function concat<T extends readonly [any, any, ...any[]]>(...values: T): Concat<T>
Flattens and filters nullish values from arguments, returning a new
array containing only the non-nullish elements. Nested arrays are
flattened one level deep.
@see ― https://radashi.js.org/reference/array/concat
@example 
const result = _.concat('', ['a'], undefined, [null, 'b'])
// => ['', 'a', 'b']
@example 
const result = _.concat(1, [2, [3]], null)
// => [1, 2, [3]] // Note: only flattens one level
@version ― 12.5.0
concat } from 'radashi'

const 
const result: string[]
result = 
concat<[string, null, (string | undefined)[], string]>(values_0: string, values_1: null, values_2: (string | undefined)[], values_3: string): string[]
Flattens and filters nullish values from arguments, returning a new
array containing only the non-nullish elements. Nested arrays are
flattened one level deep.
@see ― https://radashi.js.org/reference/array/concat
@example 
const result = _.concat('', ['a'], undefined, [null, 'b'])
// => ['', 'a', 'b']
@example 
const result = _.concat(1, [2, [3]], null)
// => [1, 2, [3]] // Note: only flattens one level
@version ― 12.5.0
concat('a', null, ['b', 
var undefined
undefined], 'c')
// => ['a', 'b', 'c']