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isArray() preserve mutability and element type #48228

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isArray() preserve mutability and element type #48228

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ce7e3c8
isArray() preserve mutability and element type
jablko Mar 11, 2022
8f90881
Update Baselines and/or Applied Lint Fixes
typescript-bot Mar 11, 2022
ee71078
Merge branch 'main' into pr-48228
jakebailey Jul 25, 2024
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2 changes: 2 additions & 0 deletions src/lib/es2015.iterable.d.ts
View file
Original file line number Diff line number Diff line change
@@ -62,6 +62,8 @@ interface Array<T> {
}

interface ArrayConstructor {
isArray<T>(arg: Iterable<T>): arg is readonly T[];

/**
* Creates an array from an iterable object.
* @param iterable An iterable object to convert to an array.
3 changes: 2 additions & 1 deletion src/lib/es5.d.ts
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Original file line number Diff line number Diff line change
@@ -1492,7 +1492,8 @@ interface ArrayConstructor {
(arrayLength?: number): any[];
<T>(arrayLength: number): T[];
<T>(...items: T[]): T[];
isArray(arg: any): arg is any[];
isArray<T>(arg: ArrayLike<T>): arg is readonly T[];
isArray(arg: unknown): arg is any[];
readonly prototype: any[];
}

4 changes: 2 additions & 2 deletions tests/baselines/reference/arrayDestructuringInSwitch1.symbols
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Original file line number Diff line number Diff line change
@@ -16,9 +16,9 @@ export function evaluate(expression: Expression): boolean {
>Expression : Symbol(Expression, Decl(arrayDestructuringInSwitch1.ts, 0, 0))

if (Array.isArray(expression)) {
>Array.isArray : Symbol(ArrayConstructor.isArray, Decl(lib.es5.d.ts, --, --))
>Array.isArray : Symbol(ArrayConstructor.isArray, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --))
>Array : Symbol(Array, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --))
>isArray : Symbol(ArrayConstructor.isArray, Decl(lib.es5.d.ts, --, --))
>isArray : Symbol(ArrayConstructor.isArray, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --))
>expression : Symbol(expression, Decl(arrayDestructuringInSwitch1.ts, 3, 25))

const [operator, ...operands] = expression;
8 changes: 4 additions & 4 deletions tests/baselines/reference/arrayDestructuringInSwitch1.types
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Original file line number Diff line number Diff line change
@@ -18,12 +18,12 @@ export function evaluate(expression: Expression): boolean {
if (Array.isArray(expression)) {
>Array.isArray(expression) : boolean
> : ^^^^^^^
>Array.isArray : (arg: any) => arg is any[]
> : ^ ^^ ^^^^^
>Array.isArray : { <T>(arg: ArrayLike<T>): arg is readonly T[]; (arg: unknown): arg is any[]; }
> : ^^^ ^^ ^^ ^^^ ^^^ ^^ ^^^ ^^^
>Array : ArrayConstructor
> : ^^^^^^^^^^^^^^^^
>isArray : (arg: any) => arg is any[]
> : ^ ^^ ^^^^^
>isArray : { <T>(arg: ArrayLike<T>): arg is readonly T[]; (arg: unknown): arg is any[]; }
> : ^^^ ^^ ^^ ^^^ ^^^ ^^ ^^^ ^^^
>expression : Expression
> : ^^^^^^^^^^

4 changes: 2 additions & 2 deletions ...baselines/reference/declarationsWithRecursiveInternalTypesProduceUniqueTypeParams.symbols
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Original file line number Diff line number Diff line change
@@ -81,9 +81,9 @@ export const updateIfChanged = <T>(t: T) => {
>Object.assign : Symbol(ObjectConstructor.assign, Decl(lib.es2015.core.d.ts, --, --), Decl(lib.es2015.core.d.ts, --, --), Decl(lib.es2015.core.d.ts, --, --), Decl(lib.es2015.core.d.ts, --, --))
>Object : Symbol(Object, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --))
>assign : Symbol(ObjectConstructor.assign, Decl(lib.es2015.core.d.ts, --, --), Decl(lib.es2015.core.d.ts, --, --), Decl(lib.es2015.core.d.ts, --, --), Decl(lib.es2015.core.d.ts, --, --))
>Array.isArray : Symbol(ArrayConstructor.isArray, Decl(lib.es5.d.ts, --, --))
>Array.isArray : Symbol(ArrayConstructor.isArray, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --), Decl(lib.es2015.iterable.d.ts, --, --))
>Array : Symbol(Array, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --), Decl(lib.es2015.core.d.ts, --, --), Decl(lib.es2015.iterable.d.ts, --, --), Decl(lib.es2015.symbol.wellknown.d.ts, --, --))
>isArray : Symbol(ArrayConstructor.isArray, Decl(lib.es5.d.ts, --, --))
>isArray : Symbol(ArrayConstructor.isArray, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --), Decl(lib.es2015.iterable.d.ts, --, --))
>u : Symbol(u, Decl(declarationsWithRecursiveInternalTypesProduceUniqueTypeParams.ts, 7, 23))
>u : Symbol(u, Decl(declarationsWithRecursiveInternalTypesProduceUniqueTypeParams.ts, 7, 23))
>[key] : Symbol([key], Decl(declarationsWithRecursiveInternalTypesProduceUniqueTypeParams.ts, 12, 80))
8 changes: 4 additions & 4 deletions ...s/baselines/reference/declarationsWithRecursiveInternalTypesProduceUniqueTypeParams.types
View file
Original file line number Diff line number Diff line change
@@ -119,12 +119,12 @@ export const updateIfChanged = <T>(t: T) => {
> : ^^^^^^^^^^^^^^^^
>Array.isArray(u) : boolean
> : ^^^^^^^
>Array.isArray : (arg: any) => arg is any[]
> : ^ ^^ ^^^^^
>Array.isArray : { <T_1>(arg: ArrayLike<T_1>): arg is readonly T_1[]; (arg: unknown): arg is any[]; <T_1>(arg: Iterable<T_1>): arg is readonly T_1[]; }
> : ^^^^^^^^ ^^ ^^^ ^^^ ^^ ^^^ ^^^^^^^^ ^^ ^^^ ^^^
>Array : ArrayConstructor
> : ^^^^^^^^^^^^^^^^
>isArray : (arg: any) => arg is any[]
> : ^ ^^ ^^^^^
>isArray : { <T_1>(arg: ArrayLike<T_1>): arg is readonly T_1[]; (arg: unknown): arg is any[]; <T_1>(arg: Iterable<T_1>): arg is readonly T_1[]; }
> : ^^^^^^^^ ^^ ^^^ ^^^ ^^ ^^^ ^^^^^^^^ ^^ ^^^ ^^^
>u : U
> : ^
>[] : undefined[]
4 changes: 2 additions & 2 deletions tests/baselines/reference/fixSignatureCaching.symbols
View file
Original file line number Diff line number Diff line change
@@ -798,9 +798,9 @@ define(function () {
>Array : Symbol(Array, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --))

Array.isArray : function (value) { return Object.prototype.toString.call(value) === '[object Array]'; };
>Array.isArray : Symbol(ArrayConstructor.isArray, Decl(lib.es5.d.ts, --, --))
>Array.isArray : Symbol(ArrayConstructor.isArray, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --))
>Array : Symbol(Array, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --))
>isArray : Symbol(ArrayConstructor.isArray, Decl(lib.es5.d.ts, --, --))
>isArray : Symbol(ArrayConstructor.isArray, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --))
>value : Symbol(value, Decl(fixSignatureCaching.ts, 297, 34))
>Object.prototype.toString.call : Symbol(Function.call, Decl(lib.es5.d.ts, --, --))
>Object.prototype.toString : Symbol(Object.toString, Decl(lib.es5.d.ts, --, --))
8 changes: 4 additions & 4 deletions tests/baselines/reference/fixSignatureCaching.types
View file
Original file line number Diff line number Diff line change
@@ -1660,12 +1660,12 @@ define(function () {
> : ^^^^^^^^^^^^^^^^

Array.isArray : function (value) { return Object.prototype.toString.call(value) === '[object Array]'; };
>Array.isArray : (arg: any) => arg is any[]
> : ^ ^^ ^^^^^
>Array.isArray : { <T>(arg: ArrayLike<T>): arg is readonly T[]; (arg: unknown): arg is any[]; }
> : ^^^ ^^ ^^ ^^^ ^^^ ^^ ^^^ ^^^
>Array : ArrayConstructor
> : ^^^^^^^^^^^^^^^^
>isArray : (arg: any) => arg is any[]
> : ^ ^^ ^^^^^
>isArray : { <T>(arg: ArrayLike<T>): arg is readonly T[]; (arg: unknown): arg is any[]; }
> : ^^^ ^^ ^^ ^^^ ^^^ ^^ ^^^ ^^^
>function (value) { return Object.prototype.toString.call(value) === '[object Array]'; } : (value: any) => boolean
> : ^ ^^^^^^^^^^^^^^^^^
>value : any
8 changes: 4 additions & 4 deletions tests/baselines/reference/inKeywordTypeguard(strict=false).symbols
View file
Original file line number Diff line number Diff line change
@@ -891,9 +891,9 @@ function test1<T extends any[] | Record<string, any>>(obj: T) {
>T : Symbol(T, Decl(inKeywordTypeguard.ts, 357, 15))

if (Array.isArray(obj) || 'length' in obj) {
>Array.isArray : Symbol(ArrayConstructor.isArray, Decl(lib.es5.d.ts, --, --))
>Array.isArray : Symbol(ArrayConstructor.isArray, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --), Decl(lib.es2015.iterable.d.ts, --, --))
>Array : Symbol(Array, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --), Decl(lib.es2015.core.d.ts, --, --), Decl(lib.es2015.iterable.d.ts, --, --), Decl(lib.es2015.symbol.wellknown.d.ts, --, --))
>isArray : Symbol(ArrayConstructor.isArray, Decl(lib.es5.d.ts, --, --))
>isArray : Symbol(ArrayConstructor.isArray, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --), Decl(lib.es2015.iterable.d.ts, --, --))
>obj : Symbol(obj, Decl(inKeywordTypeguard.ts, 357, 54))
>obj : Symbol(obj, Decl(inKeywordTypeguard.ts, 357, 54))

@@ -914,9 +914,9 @@ function test2<T extends any[] | Record<string, any>>(obj: T) {
>T : Symbol(T, Decl(inKeywordTypeguard.ts, 366, 15))

if (Array.isArray(obj)) {
>Array.isArray : Symbol(ArrayConstructor.isArray, Decl(lib.es5.d.ts, --, --))
>Array.isArray : Symbol(ArrayConstructor.isArray, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --), Decl(lib.es2015.iterable.d.ts, --, --))
>Array : Symbol(Array, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --), Decl(lib.es2015.core.d.ts, --, --), Decl(lib.es2015.iterable.d.ts, --, --), Decl(lib.es2015.symbol.wellknown.d.ts, --, --))
>isArray : Symbol(ArrayConstructor.isArray, Decl(lib.es5.d.ts, --, --))
>isArray : Symbol(ArrayConstructor.isArray, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --), Decl(lib.es2015.iterable.d.ts, --, --))
>obj : Symbol(obj, Decl(inKeywordTypeguard.ts, 366, 54))

obj; // T & any[]
19 changes: 11 additions & 8 deletions tests/baselines/reference/inKeywordTypeguard(strict=false).types
View file
Original file line number Diff line number Diff line change
@@ -1,5 +1,8 @@
//// [tests/cases/compiler/inKeywordTypeguard.ts] ////

=== Performance Stats ===
Type Count: 1,000

=== inKeywordTypeguard.ts ===
class A { a: string; }
>A : A
@@ -1710,12 +1713,12 @@ function test1<T extends any[] | Record<string, any>>(obj: T) {
> : ^^^^^^^
>Array.isArray(obj) : boolean
> : ^^^^^^^
>Array.isArray : (arg: any) => arg is any[]
> : ^ ^^ ^^^^^
>Array.isArray : { <T_1>(arg: ArrayLike<T_1>): arg is readonly T_1[]; (arg: unknown): arg is any[]; <T_1>(arg: Iterable<T_1>): arg is readonly T_1[]; }
> : ^^^^^^^^ ^^ ^^^ ^^^ ^^ ^^^ ^^^^^^^^ ^^ ^^^ ^^^
>Array : ArrayConstructor
> : ^^^^^^^^^^^^^^^^
>isArray : (arg: any) => arg is any[]
> : ^ ^^ ^^^^^
>isArray : { <T_1>(arg: ArrayLike<T_1>): arg is readonly T_1[]; (arg: unknown): arg is any[]; <T_1>(arg: Iterable<T_1>): arg is readonly T_1[]; }
> : ^^^^^^^^ ^^ ^^^ ^^^ ^^ ^^^ ^^^^^^^^ ^^ ^^^ ^^^
>obj : any[] | Record<string, any>
> : ^^^^^^^^^^^^^^^^^^^^^^^^^^^
>'length' in obj : boolean
@@ -1745,12 +1748,12 @@ function test2<T extends any[] | Record<string, any>>(obj: T) {
if (Array.isArray(obj)) {
>Array.isArray(obj) : boolean
> : ^^^^^^^
>Array.isArray : (arg: any) => arg is any[]
> : ^ ^^ ^^^^^
>Array.isArray : { <T_1>(arg: ArrayLike<T_1>): arg is readonly T_1[]; (arg: unknown): arg is any[]; <T_1>(arg: Iterable<T_1>): arg is readonly T_1[]; }
> : ^^^^^^^^ ^^ ^^^ ^^^ ^^ ^^^ ^^^^^^^^ ^^ ^^^ ^^^
>Array : ArrayConstructor
> : ^^^^^^^^^^^^^^^^
>isArray : (arg: any) => arg is any[]
> : ^ ^^ ^^^^^
>isArray : { <T_1>(arg: ArrayLike<T_1>): arg is readonly T_1[]; (arg: unknown): arg is any[]; <T_1>(arg: Iterable<T_1>): arg is readonly T_1[]; }
> : ^^^^^^^^ ^^ ^^^ ^^^ ^^ ^^^ ^^^^^^^^ ^^ ^^^ ^^^
>obj : any[] | Record<string, any>
> : ^^^^^^^^^^^^^^^^^^^^^^^^^^^

8 changes: 4 additions & 4 deletions tests/baselines/reference/inKeywordTypeguard(strict=true).symbols
View file
Original file line number Diff line number Diff line change
@@ -891,9 +891,9 @@ function test1<T extends any[] | Record<string, any>>(obj: T) {
>T : Symbol(T, Decl(inKeywordTypeguard.ts, 357, 15))

if (Array.isArray(obj) || 'length' in obj) {
>Array.isArray : Symbol(ArrayConstructor.isArray, Decl(lib.es5.d.ts, --, --))
>Array.isArray : Symbol(ArrayConstructor.isArray, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --), Decl(lib.es2015.iterable.d.ts, --, --))
>Array : Symbol(Array, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --), Decl(lib.es2015.core.d.ts, --, --), Decl(lib.es2015.iterable.d.ts, --, --), Decl(lib.es2015.symbol.wellknown.d.ts, --, --))
>isArray : Symbol(ArrayConstructor.isArray, Decl(lib.es5.d.ts, --, --))
>isArray : Symbol(ArrayConstructor.isArray, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --), Decl(lib.es2015.iterable.d.ts, --, --))
>obj : Symbol(obj, Decl(inKeywordTypeguard.ts, 357, 54))
>obj : Symbol(obj, Decl(inKeywordTypeguard.ts, 357, 54))

@@ -914,9 +914,9 @@ function test2<T extends any[] | Record<string, any>>(obj: T) {
>T : Symbol(T, Decl(inKeywordTypeguard.ts, 366, 15))

if (Array.isArray(obj)) {
>Array.isArray : Symbol(ArrayConstructor.isArray, Decl(lib.es5.d.ts, --, --))
>Array.isArray : Symbol(ArrayConstructor.isArray, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --), Decl(lib.es2015.iterable.d.ts, --, --))
>Array : Symbol(Array, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --), Decl(lib.es2015.core.d.ts, --, --), Decl(lib.es2015.iterable.d.ts, --, --), Decl(lib.es2015.symbol.wellknown.d.ts, --, --))
>isArray : Symbol(ArrayConstructor.isArray, Decl(lib.es5.d.ts, --, --))
>isArray : Symbol(ArrayConstructor.isArray, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --), Decl(lib.es2015.iterable.d.ts, --, --))
>obj : Symbol(obj, Decl(inKeywordTypeguard.ts, 366, 54))

obj; // T & any[]
16 changes: 8 additions & 8 deletions tests/baselines/reference/inKeywordTypeguard(strict=true).types
View file
Original file line number Diff line number Diff line change
@@ -1713,12 +1713,12 @@ function test1<T extends any[] | Record<string, any>>(obj: T) {
> : ^^^^^^^
>Array.isArray(obj) : boolean
> : ^^^^^^^
>Array.isArray : (arg: any) => arg is any[]
> : ^ ^^ ^^^^^
>Array.isArray : { <T_1>(arg: ArrayLike<T_1>): arg is readonly T_1[]; (arg: unknown): arg is any[]; <T_1>(arg: Iterable<T_1>): arg is readonly T_1[]; }
> : ^^^^^^^^ ^^ ^^^ ^^^ ^^ ^^^ ^^^^^^^^ ^^ ^^^ ^^^
>Array : ArrayConstructor
> : ^^^^^^^^^^^^^^^^
>isArray : (arg: any) => arg is any[]
> : ^ ^^ ^^^^^
>isArray : { <T_1>(arg: ArrayLike<T_1>): arg is readonly T_1[]; (arg: unknown): arg is any[]; <T_1>(arg: Iterable<T_1>): arg is readonly T_1[]; }
> : ^^^^^^^^ ^^ ^^^ ^^^ ^^ ^^^ ^^^^^^^^ ^^ ^^^ ^^^
>obj : any[] | Record<string, any>
> : ^^^^^^^^^^^^^^^^^^^^^^^^^^^
>'length' in obj : boolean
@@ -1748,12 +1748,12 @@ function test2<T extends any[] | Record<string, any>>(obj: T) {
if (Array.isArray(obj)) {
>Array.isArray(obj) : boolean
> : ^^^^^^^
>Array.isArray : (arg: any) => arg is any[]
> : ^ ^^ ^^^^^
>Array.isArray : { <T_1>(arg: ArrayLike<T_1>): arg is readonly T_1[]; (arg: unknown): arg is any[]; <T_1>(arg: Iterable<T_1>): arg is readonly T_1[]; }
> : ^^^^^^^^ ^^ ^^^ ^^^ ^^ ^^^ ^^^^^^^^ ^^ ^^^ ^^^
>Array : ArrayConstructor
> : ^^^^^^^^^^^^^^^^
>isArray : (arg: any) => arg is any[]
> : ^ ^^ ^^^^^
>isArray : { <T_1>(arg: ArrayLike<T_1>): arg is readonly T_1[]; (arg: unknown): arg is any[]; <T_1>(arg: Iterable<T_1>): arg is readonly T_1[]; }
> : ^^^^^^^^ ^^ ^^^ ^^^ ^^ ^^^ ^^^^^^^^ ^^ ^^^ ^^^
>obj : any[] | Record<string, any>
> : ^^^^^^^^^^^^^^^^^^^^^^^^^^^

16 changes: 8 additions & 8 deletions tests/baselines/reference/instantiationExpressions.types
View file
Original file line number Diff line number Diff line change
@@ -95,18 +95,18 @@ function f2() {
> : ^^^^^^^^^^^^^^^^

const A1 = Array<string>; // new (...) => string[]
>A1 : { (arrayLength: number): string[]; (...items: string[]): string[]; new (arrayLength: number): string[]; new (...items: string[]): string[]; isArray(arg: any): arg is any[]; readonly prototype: any[]; }
> : ^^^ ^^ ^^^^^^^^^^^^^^^^^ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ^^ ^^^^^^^^^^^^^^^^^^^^^ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ^^ ^^^ ^^^^^^^^^^^^^^^^^^^^^^ ^^^
>Array<string> : { (arrayLength: number): string[]; (...items: string[]): string[]; new (arrayLength: number): string[]; new (...items: string[]): string[]; isArray(arg: any): arg is any[]; readonly prototype: any[]; }
> : ^^^ ^^ ^^^^^^^^^^^^^^^^^ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ^^ ^^^^^^^^^^^^^^^^^^^^^ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ^^ ^^^ ^^^^^^^^^^^^^^^^^^^^^^ ^^^
>A1 : { (arrayLength: number): string[]; (...items: string[]): string[]; new (arrayLength: number): string[]; new (...items: string[]): string[]; isArray<T>(arg: ArrayLike<T>): arg is readonly T[]; isArray(arg: unknown): arg is any[]; readonly prototype: any[]; }
> : ^^^ ^^ ^^^^^^^^^^^^^^^^^ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ^^ ^^^^^^^^^^^^^^^^^^^^^ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ^^ ^^ ^^^ ^^^^^^^^^^ ^^ ^^^ ^^^^^^^^^^^^^^^^^^^^^^ ^^^
>Array<string> : { (arrayLength: number): string[]; (...items: string[]): string[]; new (arrayLength: number): string[]; new (...items: string[]): string[]; isArray<T>(arg: ArrayLike<T>): arg is readonly T[]; isArray(arg: unknown): arg is any[]; readonly prototype: any[]; }
> : ^^^ ^^ ^^^^^^^^^^^^^^^^^ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ^^ ^^^^^^^^^^^^^^^^^^^^^ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ^^ ^^ ^^^ ^^^^^^^^^^ ^^ ^^^ ^^^^^^^^^^^^^^^^^^^^^^ ^^^
>Array : ArrayConstructor
> : ^^^^^^^^^^^^^^^^

const A2 = Array<string, number>; // Error
>A2 : { isArray(arg: any): arg is any[]; readonly prototype: any[]; }
> : ^^^^^^^^^^ ^^ ^^^ ^^^^^^^^^^^^^^^^^^^^^^ ^^^
>Array<string, number> : { isArray(arg: any): arg is any[]; readonly prototype: any[]; }
> : ^^^^^^^^^^ ^^ ^^^ ^^^^^^^^^^^^^^^^^^^^^^ ^^^
>A2 : { isArray<T>(arg: ArrayLike<T>): arg is readonly T[]; isArray(arg: unknown): arg is any[]; readonly prototype: any[]; }
> : ^^^^^^^^^^ ^^ ^^ ^^^ ^^^^^^^^^^ ^^ ^^^ ^^^^^^^^^^^^^^^^^^^^^^ ^^^
>Array<string, number> : { isArray<T>(arg: ArrayLike<T>): arg is readonly T[]; isArray(arg: unknown): arg is any[]; readonly prototype: any[]; }
> : ^^^^^^^^^^ ^^ ^^ ^^^ ^^^^^^^^^^ ^^ ^^^ ^^^^^^^^^^^^^^^^^^^^^^ ^^^
>Array : ArrayConstructor
> : ^^^^^^^^^^^^^^^^
}
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