useEffect(() => {
})
<>
<Child log1 />
{console.log("log3")}
<Child log2 />
>
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type TextMarks = | |
| { type: "bold" } | |
| { type: "italic" } | |
| { type: "code" } | |
| { type: "strike" } | |
| { type: "textStyle"; attrs: Partial<CSSStyleDeclaration> } | |
| { | |
type: "link"; | |
attrs: { | |
href: string; |
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import { createLiveState, crdtSchema } from "@/lib/live-state"; | |
export type NotebookJSON = { | |
title: string; | |
description: string; | |
cells: TextCell[]; | |
}; | |
const notebookCRDTSchema = { | |
title: crdtSchema.LiveText(), |
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type RafState<Args> = | |
| { type: 'waiting'; latestArgs: Args; rafId: number } | |
| { type: 'idle' }; | |
export const animationFrameThrottle = <Args extends any[]>( | |
callback: (...args: Args) => unknown, | |
): ((...args: Args) => void) & { cancel: () => void } => { | |
let state: RafState<Args> = { type: 'idle' }; | |
const cancel = () => { |
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export function usePrevious<T>(value: T): T | undefined { | |
const ref = React.useRef<T>(); | |
React.useEffect(() => { | |
ref.current = value; | |
}); | |
return ref.current; | |
} |
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import { arg0, Call, Constant, Eval, Fn, Objects, Tuples } from "../src/index"; | |
type Ok<A> = { tag: "Ok"; value: A }; | |
type Err<B> = { tag: "Err"; value: B }; | |
type Result<A, B> = Ok<A> | Err<B>; | |
type ParseError<expected = unknown, encountered = unknown> = { | |
expected: expected; |
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type MergeParameters3<T extends readonly UnknownFunction[]> = H.Pipe< | |
T, | |
[ | |
H.Let<"parametersList", H.Tuples.Map<H.Functions.Parameters>>, | |
H.Let< | |
"longestLength", | |
H.ComposeLeft< | |
[ | |
H.Get<"parametersList">, | |
H.Tuples.Map<H.Tuples.Length>, |
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// a conditional type is just type-level code branching | |
// A extends B means "A is assignable to B" | |
type Test1 = "hello" extends string ? true : false; | |
// ^? | |
type Test2 = 2 extends string ? true : false; | |
// ^? |
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// mapped type version | |
type Fn<T> = { | |
[K in keyof T]: [K, T[K]] /* arbitrary fn using K and T[k] */; | |
}; | |
// distributive union version | |
type Fn2<T> = FromEntries< | |
keyof T extends infer K | |
? K extends keyof T | |
? [K, [K, T[K]] /* arbitrary fn using K and T[k] */] |
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import type { Equal, Expect } from '@type-challenges/utils' | |
type Assign<A, B> = { | |
[K in keyof A | keyof B]: K extends keyof B | |
? B[K] | |
: K extends keyof A | |
? A[K] | |
: never; | |
} |
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