A library of composable functions for the type-level! Transform your TypeScript types in any way you want using functions you already know.
A library of composable functions for the type level!
Transform your TypeScript types in any way you want using functions you already know.
Tuples.Map, Tuples.Filter, Objects.MapValues, etc).Match.Numbers.Add, Numbers.Sub, Numbers.Mul, Numbers.Div, etc).🚧 work in progress 🚧
You can find HotScript on npm:
npm install -D hotscript
HotScript is a work-in-progress library, so expect breaking changes in its API.
Run this as a TypeScript Playground
import { Pipe, Tuples, Strings, Numbers } from "hotscript";
type res1 = Pipe<
// ^? 62
[1, 2, 3, 4],
[
Tuples.Map<Numbers.Add<3>>, // [4, 5, 6, 7]
Tuples.Join<".">, // "4.5.6.7"
Strings.Split<".">, // ["4", "5", "6", "7"]
Tuples.Map<Strings.Prepend<"1">>, // ["14", "15", "16", "17"]
Tuples.Map<Strings.ToNumber>, // [14, 15, 16, 17]
Tuples.Sum // 62
]
>;
Run this as a TypeScript Playground
import { Call, Fn, Tuples } from "hotscript";
// This is a type-level "lambda"!
interface Duplicate extends Fn {
return: [this["arg0"], this["arg0"]];
}
type result1 = Call<Tuples.Map<Duplicate>, [1, 2, 3, 4]>;
// ^? [[1, 1], [2, 2], [3, 3], [4, 4]]
type result2 = Call<Tuples.FlatMap<Duplicate>, [1, 2, 3, 4]>;
// ^? [1, 1, 2, 2, 3, 3, 4, 4]
Run this as a TypeScript Playground
import { Pipe, Objects, Booleans } from "hotscript";
// Let's compose some functions to transform an object type:
type ToAPIPayload<T> = Pipe<
T,
[
Objects.OmitBy<Booleans.Equals<symbol>>,
Objects.Assign<{ metadata: { newUser: true } }>,
Objects.SnakeCaseDeep,
Objects.Assign<{ id: string }>
]
>;
type T = ToAPIPayload<{
id: symbol;
firstName: string;
lastName: string;
}>;
// Returns:
type T = {
id: string;
metadata: { new_user: true };
first_name: string;
last_name: string;
};
Run this as a TypeScript Playground
https://user-images.githubusercontent.com/2315749/222081717-96217cd2-ac89-4e06-a942-17fbda717cd2.mp4
import { Pipe, Objects, Strings, ComposeLeft, Tuples, Match } from "hotscript";
type res5 = Pipe<
// ^? { id: string, index: number }
"/users/<id:string>/posts/<index:number>",
[
Strings.Split<"/">,
Tuples.Filter<Strings.StartsWith<"<">>,
Tuples.Map<ComposeLeft<[Strings.Trim<"<" | ">">, Strings.Split<":">]>>,
Tuples.ToUnion,
Objects.FromEntries,
Objects.MapValues<
Match<[Match.With<"string", string>, Match.With<"number", number>]>
>
]
>;
Pipe<Input, Fn[]>PipeRight<Fn[], Input>Call<Fn, ...Arg>Apply<Fn, Arg[]>PartialApply<Fn, Arg[]>Compose<Fn[]>ComposeLeft<Fn[]>ReturnType<Fn>Parameters<Fn>Parameter<N, Fn>Create<X> -> [X]Partition<Tuple>IsEmpty<Tuple>Zip<...Tuple[]>ZipWith<Fn, ...Tuple[]>Sort<Tuple>Head<Tuple>Tail<Tuple>At<N, Tuple>Last<Tuple>FlatMap<Fn, Tuple>Find<Fn, Tuple>Drop<N, Tuple>Take<N, Tuple>TakeWhile<Fn, Tuple>GroupBy<Fn, Tuple>Join<Str, Tuple>Map<Fn, Tuple>Filter<Fn, Tuple>Reduce<Fn, Init, Tuple>ReduceRight<Fn, Init, Tuple>Reverse<Tuple>Every<Fn, Tuple>Some<Fn, Tuple>SplitAt<N, Tuple>ToUnion<Tuple>ToIntersection<Tuple>Prepend<X, Tuple>Append<X, Tuple>Concat<T1, T2>Min<Tuple>Max<Tuple>Sum<Tuple>Readonly<Obj>Mutable<Obj>Required<Obj>Partial<Obj>ReadonlyDeep<Obj>MutableDeep<Obj>RequiredDeep<Obj>PartialDeep<Obj>Update<Path, Fn | V, Obj>Record<Key, Value>Keys<Obj>Values<Obj>AllPaths<Obj>Create<Pattern, X>Get<Path, Obj>FromEntries<[Key, Value]>Entries<Obj>MapValues<Fn, Obj>MapKeys<Fn, Obj>Assign<...Obj>Pick<Key, Obj>PickBy<Fn, Obj>Omit<Key, Obj>OmitBy<Fn, Obj>CamelCase<Obj>CamelCaseDeep<Obj>SnakeCase<Obj>SnakeCaseDeep<Obj>KebabCase<Obj>KebabCaseDeep<Obj>Map<Fn, U>Extract<T, U>ExtractBy<Fn, U>Exclude<T, U>ExcludeBy<Fn, U>NonNullable<U>ToTuple<U>ToIntersection<U>Length<Str>TrimLeft<Str>TrimRight<Str>Trim<Str>Join<Sep, Str>Replace<From, To, Str>Slice<Start, End, Str>Split<Sep, Str>Repeat<N, Str>StartsWith<S, Str>EndsWith<E, Str>ToTuple<Str>ToNumber<Str>ToString<Str>Prepend<Start, Str>Append<End, Str>Uppercase<Str>Lowercase<Str>Capitalize<Str>Uncapitalize<Str>SnakeCase<Str>CamelCase<Str>KebabCase<Str>Compare<Str, Str>Equal<Str, Str>NotEqual<Str, Str>LessThan<Str, Str>LessThanOrEqual<Str, Str>GreaterThan<Str, Str>GreaterThanOrEqual<Str, Str>Add<N, M>Multiply<N, M>Subtract<N, M>Negate<N>Power<N, M>Div<N, M>Mod<N, M>Abs<N>Compare<N, M>GreaterThan<N, M>GreaterThanOrEqual<N, M>LessThan<N, M>LessThanOrEqual<N, M>And<Bool, Bool>Or<Bool, Bool>XOr<Bool, Bool>Not<Bool>Extends<A, B>Equals<A, B>DoesNotExtend<A, B>FAQs
A library of composable functions for the type-level! Transform your TypeScript types in any way you want using functions you already know.
The npm package hotscript receives a total of 0 weekly downloads. As such, hotscript popularity was classified as not popular.
We found that hotscript demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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