-
Notifications
You must be signed in to change notification settings - Fork 16
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
feat(@angular-ru/common): item functions type (#684)
* feat(@angular-ru/common): item functions type * fixup! feat(@angular-ru/common): item functions type * fixup! feat(@angular-ru/common): item functions type Co-authored-by: Max Ivanov <omaxphp@yandex.ru>
- Loading branch information
Showing
10 changed files
with
81 additions
and
13 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -1,5 +1,5 @@ | ||
import { Nullable } from '@angular-ru/common/typings'; | ||
import { Nullable, TupleItem } from '@angular-ru/common/typings'; | ||
|
||
export function takeFirstItem<T>(array?: Nullable<T[]>): Nullable<T> { | ||
return array?.[0]; | ||
export function takeFirstItem<ArrayType extends Nullable<unknown[]>>(array: ArrayType): TupleItem<ArrayType, 0> { | ||
return (Array.isArray(array) ? array[0] : undefined) as TupleItem<ArrayType, 0>; | ||
} |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -1,5 +1,5 @@ | ||
import { Nullable } from '@angular-ru/common/typings'; | ||
import { LastOfTuple, Nullable } from '@angular-ru/common/typings'; | ||
|
||
export function takeLastItem<T>(array?: Nullable<T[]>): Nullable<T> { | ||
return array?.[array?.length - 1]; | ||
export function takeLastItem<ArrayType extends Nullable<unknown[]>>(array: ArrayType): LastOfTuple<ArrayType> { | ||
return (Array.isArray(array) ? array[array.length - 1] : undefined) as LastOfTuple<ArrayType>; | ||
} |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -1,5 +1,5 @@ | ||
import { Nullable } from '@angular-ru/common/typings'; | ||
import { Nullable, TupleItem } from '@angular-ru/common/typings'; | ||
|
||
export function takeSecondItem<T>(array?: Nullable<T[]>): Nullable<T> { | ||
return array?.[1]; | ||
export function takeSecondItem<ArrayType extends Nullable<unknown[]>>(array: ArrayType): TupleItem<ArrayType, 1> { | ||
return (Array.isArray(array) ? array[1] : undefined) as TupleItem<ArrayType, 1>; | ||
} |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -1,6 +1,10 @@ | ||
import { Nullable } from '@angular-ru/common/typings'; | ||
import { Nullable, TupleItem } from '@angular-ru/common/typings'; | ||
|
||
export function takeThirdItem<T>(array?: Nullable<T[]>): Nullable<T> { | ||
const thirdItemIndex: number = 2; | ||
return array?.[thirdItemIndex]; | ||
type ThirdItemIndex = 2; | ||
const thirdItemIndex: ThirdItemIndex = 2; | ||
|
||
export function takeThirdItem<ArrayType extends Nullable<unknown[]>>( | ||
array: ArrayType | ||
): TupleItem<ArrayType, ThirdItemIndex> { | ||
return (Array.isArray(array) ? array[thirdItemIndex] : undefined) as TupleItem<ArrayType, ThirdItemIndex>; | ||
} |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,3 @@ | ||
import { Tuple } from './tuple'; | ||
|
||
export type InfiniteTuple<ItemType, Length extends number = 1> = [...Tuple<ItemType, Length>, ...ItemType[]]; |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,7 @@ | ||
export type LastOfTuple<ArrayType> = ArrayType extends unknown[] | ||
? ArrayType extends [] | ||
? undefined | ||
: ArrayType extends [unknown, ...unknown[]] | ||
? ArrayType[ArrayType extends [unknown, ...infer Rest] ? Rest['length'] : number] | ||
: ArrayType[number] | undefined | ||
: undefined; |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,7 @@ | ||
import { InfiniteTuple } from './infinite-tuple'; | ||
|
||
export type TupleItem<ArrayType, Index extends number> = ArrayType extends unknown[] | ||
? ArrayType extends [unknown, ...InfiniteTuple<unknown, Index>] | ||
? ArrayType[Index] | ||
: ArrayType[Index] | undefined | ||
: undefined; |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,3 @@ | ||
export type Tuple<ItemType, Length extends number = 1, Base extends unknown[] = []> = Base['length'] extends Length | ||
? Base | ||
: Tuple<ItemType, Length, [ItemType, ...Base]>; |