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@glideapps/ts-necessities

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@glideapps/ts-necessities

Small utilities to make life with TypeScript easier

  • 2.1.0
  • Source
  • npm
  • Socket score

Version published
Weekly downloads
111K
decreased by-16.97%
Maintainers
8
Weekly downloads
 
Created

What is @glideapps/ts-necessities?

@glideapps/ts-necessities is a utility library for TypeScript that provides a collection of essential types and utility functions to simplify common tasks and improve type safety in TypeScript projects.

What are @glideapps/ts-necessities's main functionalities?

Optional

The `Optional` type allows you to define a type that can either be a specific type or `null` or `undefined`. This is useful for handling optional values in a type-safe manner.

import { Optional } from '@glideapps/ts-necessities';

function getLength(str: Optional<string>): number {
  return str ? str.length : 0;
}

console.log(getLength('hello')); // 5
console.log(getLength(null)); // 0

NonEmptyArray

The `NonEmptyArray` type ensures that an array has at least one element. This is useful for functions that require a non-empty array as input.

import { NonEmptyArray } from '@glideapps/ts-necessities';

function getFirstElement(arr: NonEmptyArray<number>): number {
  return arr[0];
}

console.log(getFirstElement([1, 2, 3])); // 1

assertNever

The `assertNever` function is used in exhaustive type checking. It ensures that all possible cases in a union type are handled, and if not, it throws a compile-time error.

import { assertNever } from '@glideapps/ts-necessities';

type Shape = 'circle' | 'square';

function getArea(shape: Shape): number {
  switch (shape) {
    case 'circle':
      return Math.PI * 1 * 1;
    case 'square':
      return 1 * 1;
    default:
      return assertNever(shape);
  }
}

console.log(getArea('circle')); // 3.141592653589793

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Package last updated on 15 May 2021

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