Switch to monorepo setup

packages/lib/Tools.ts

@@ -0,0 +1,35 @@
+export const now = () => Math.round(Date.now() / 1000)
+
+export const nth = (i: number) => <T>(xs: T[]) => xs[i]
+
+export const first = <T>(xs: T[]) => xs[0]
+
+export const last = <T>(xs: T[]) => xs[xs.length - 1]
+
+export const identity = <T>(x: T) => x
+
+export const between = (low: number, high: number, n: number) => n > low && n < high
+
+export const flatten = <T>(xs: T[]) => xs.flatMap(identity)
+
+export const uniq = <T>(xs: T[]) => Array.from(new Set(xs))
+
+export const shuffle = <T>(xs: T[]): T[] => xs.sort(() => Math.random() > 0.5 ? 1 : -1)
+
+export const isIterable = (x: any) => Symbol.iterator in Object(x)
+
+export const toIterable = (x: any) => isIterable(x) ? x : [x]
+
+export const stripProtocol = (url: string) => url.replace(/.*:\/\//, "")
+
+// https://github.com/microsoft/TypeScript/issues/4628#issuecomment-1147905253
+export type OmitStatics<T, S extends string> =
+    T extends {new(...args: infer A): infer R} ?
+        {new(...args: A): R}&Omit<T, S> :
+        Omit<T, S>;
+
+// https://github.com/microsoft/TypeScript/issues/4628#issuecomment-1147905253
+export type OmitAllStatics<T extends {new(...args: any[]): any, prototype: any}> =
+    T extends {new(...args: infer A): infer R, prototype: infer P} ?
+        {new(...args: A): R, prototype: P} :
+        never;