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Title: Tuples as types for rest ...arguments · Issue #5331 · microsoft/TypeScript · GitHub

Open Graph Title: Tuples as types for rest ...arguments · Issue #5331 · microsoft/TypeScript

X Title: Tuples as types for rest ...arguments · Issue #5331 · microsoft/TypeScript

Description: This feature could be used in observable-like generic classes/interfaces: interface EventSource { observe(listener: (...args: Args)): void; map(mapping: (...args: Args) => T): EventSource<[T]>; } Currently the only...

Open Graph Description: This feature could be used in observable-like generic classes/interfaces: interface EventSource { observe(listener: (...args: Args)): void; map(mapping: (...args: Args) => T)...

X Description: This feature could be used in observable-like generic classes/interfaces: interface EventSource<Args extends any[]> { observe(listener: (...args: Args)): void; map<T>(mapping: (...args:...

Opengraph URL: https://github.com/microsoft/TypeScript/issues/5331

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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Tuples as types for rest ...arguments","articleBody":"This feature could be used in observable-like generic classes/interfaces:\n\n``` ts\ninterface EventSource\u003cArgs extends any[]\u003e {\n  observe(listener: (...args: Args)): void;\n  map\u003cT\u003e(mapping: (...args: Args) =\u003e T): EventSource\u003c[T]\u003e;\n}\n```\n\nCurrently the only way I know of is to fallback to `any`.\n","author":{"url":"https://github.com/g162h3","@type":"Person","name":"g162h3"},"datePublished":"2015-10-19T22:47:46.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":4},"url":"https://github.com/5331/TypeScript/issues/5331"}

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