// typeorm type userFilter = MyParameters<User.find>
![const foo = (arg1: string, arg2: number): void => { }
type MyParameters<T extends (...args: any[]) => any> = T extends (...args: infer P) => any ? P : never;
type FunctionParamsType = MyParameters<typeof foo> // [arg1: string, arg2: number]](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:4vkspshcmybopmi5jufsce6b/bafkreibnrguqg3wbdtqagekdvblebwqwam54npeyt24kccw45t2eey6bly)
const foo = (arg1: string, arg2: number): void => { } type MyParameters<T extends (...args: any[]) => any> = T extends (...args: infer P) => any ? P : never; type FunctionParamsType = MyParameters<typeof foo> // [arg1: string, arg2: number]
With TypeScript’s infer and mapped types, you can extract hidden types to make type-safe helpers for ORMs instead of using any. This helps create safer, smarter filter params. #TypeScript #infer #MappedTypes #TypeSafety #ORM #DevTips
0
0
0
0
![type Signal<T extends object> = T & {
onChange: (callback: Callback<T>) => () => void;
} & {
[K in keyof T as `on${Capitalize<string & K>}Change`]: (callback: (value: T[K], oldValue: T[K]) => void) => () => void;
} & {
[K in keyof T as `${string & K}AsSignal`]: T[K] extends object ? Signal<T[K]> : Signal<{value: T[K]}>;
}](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:4vkspshcmybopmi5jufsce6b/bafkreigvhu4tfvzf2istwdfow6mu4gtmjvbtbigj25q6tdhinzvfq6pmjm)
