Type alias IsArray<T, $O>

🎭 predicate

Validate that T is an array.

Example

type R = IsArray<number[]> // true
type R = IsArray<[1]> // true

type R = IsArray<number> // false
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🔢 customize

Filter to ensure T is an array, otherwise returns never.

Example

type R = IsArray<number[], { selection: 'filter' }> // number[]
type R = IsArray<number, { selection: 'filter' }> // never
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🔢 customize

Disable distribution of union types.

Example

type R = IsArray<number[] | 1> // boolean
type R = IsArray<number[] | 1, { distributive: false }> // false
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🔢 customize

Check if T is exactly an array, excluding tuple.

Example

type R = IsArray<[]> // true
type R = IsArray<[], { exact: true }> // false
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🔢 customize

Use unique branch identifiers to allow precise processing of the result.

Example

type R = IsArray<number[], IsArray.$Branch> // $Then
type R = IsArray<number, IsArray.$Branch> // $Else
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