scope-methods

A collection of Kotlin-inspired scope methods for JavaScript/TypeScript, implemented using safe module augmentation. These methods enhance the readability and maintainability of your code by providing a more expressive way to work with objects and values within specific scopes.

Available Methods

• pipe: Executes a provided function with this value as its argument and returns its result.
• also: Executes a provided function with this value as its argument and returns this value.
• keepIf: Returns this value if it satisfies the given predicate or undefined if it does not.

Usage

import { also, keepIf, pipe } from "scope-methods";

({ a: 6, b: 7 })
  [also](console.log) // Logs: { a: 6, b: 7 }
  [pipe](({ a, b }) => (a * b))
  [keepIf]((value) => value > 15); // Returns: 42

Which is roughly equivalent to:

const input = { a: 6, b: 7 };
console.log(input); // Logs: { a: 6, b: 7 }
const { a, b } = input;
const value = a * b;
value > 15 ? value : undefined; // Returns: 42

Note that with "scope-methods", the intermediate variables are avoided, leading to more concise and readable code.