chore: ESLint

Upgrade ESLint to `v9`

Author: marcobiedermann

eslint.config.js

@@ -0,0 +1,15 @@
+import js from '@eslint/js';
+import globals from 'globals';
+import tseslint from 'typescript-eslint';
+
+export default tseslint.config(
+  { ignores: ['dist'] },
+  {
+    extends: [js.configs.recommended, ...tseslint.configs.recommended],
+    files: ['**/*.ts'],
+    languageOptions: {
+      ecmaVersion: 2020,
+      globals: globals.browser,
+    },
+  },
+);

kata/5 kyu/perimeter-of-squares-in-a-rectangle/index.ts

@@ -1,5 +1,3 @@
-/* eslint-disable no-param-reassign */
-
 function fibonacci(n: number, cache: number[] = []): number {
   if (cache[n]) {
     return cache[n];

kata/6 kyu/array-dot-diff/index.test.ts

@@ -1,5 +1,3 @@
-/* eslint-disable camelcase */
-
 import assert from 'node:assert/strict';
 import { describe, it } from 'node:test';
 import array_diff from './index.ts';

kata/6 kyu/array-dot-diff/index.ts

@@ -1,5 +1,3 @@
-/* eslint-disable camelcase */
-
 function array_diff(a: number[], b: number[]): number[] {
   return a.filter((val) => !b.includes(val));
 }

kata/6 kyu/can-you-keep-a-secret/index.ts

@@ -1,5 +1,4 @@
 function createSecretHolder(secret: number) {
-  // eslint-disable-next-line no-underscore-dangle
   let _secret = secret;
 
   return {

kata/6 kyu/pokemon-damage-calculator/index.ts

@@ -1,6 +1,8 @@
+import type { Any } from '../../@types/types.ts';
+
 type Type = 'electric' | 'fire' | 'grass' | 'water';
 
-type EffectivenessTable = Record<Type, any>;
+type EffectivenessTable = Record<Type, Any>;
 
 const effectivenessTable: EffectivenessTable = {
   electric: {

kata/6 kyu/prefill-an-array/index.ts

@@ -1,4 +1,6 @@
-function prefill<T>(n: any, v: T): T[] {
+import type { Any } from '../../@types/types.ts';
+
+function prefill<T>(n: Any, v: T): T[] {
   const parsed = parseInt(n, 10);
 
   if (parsed !== Math.abs(n)) {

kata/6 kyu/rectangle-into-squares/index.ts

@@ -1,5 +1,3 @@
-/* eslint-disable no-shadow */
-
 function sqInRect(lng: number, wdth: number): number[] | null {
   if (lng === wdth) {
     return null;

kata/6 kyu/roman-numerals-encoder/index.ts

@@ -1,6 +1,4 @@
-/* eslint-disable */
-
-const symbols = {
+const letters = {
   M: 1000,
   CM: 900,
   D: 500,
@@ -16,16 +14,16 @@ const symbols = {
   I: 1,
 };
 
-type Symbol = keyof typeof symbols;
+type Letter = keyof typeof letters;
 
 function solution(num: number): string {
   let roman = '';
-  let i: Symbol;
+  let i: Letter;
 
-  for (i in symbols) {
-    while (num >= symbols[i]) {
+  for (i in letters) {
+    while (num >= letters[i]) {
       roman += i;
-      num -= symbols[i];
+      num -= letters[i];
     }
   }
 

kata/6 kyu/sum-of-digits-slash-digital-root/index.test.ts

@@ -1,5 +1,3 @@
-/* eslint-disable camelcase */
-
 import assert from 'node:assert/strict';
 import { describe, it } from 'node:test';
 import digital_root from './index.ts';

kata/6 kyu/sum-of-digits-slash-digital-root/index.ts

@@ -1,5 +1,3 @@
-/* eslint-disable camelcase */
-
 function digital_root(n: number): number {
   return ((n - 1) % 9) + 1;
 }

kata/6 kyu/valid-braces/index.ts

@@ -1,3 +1,5 @@
+import type { Any } from '../../@types/types.ts';
+
 interface Matches {
   [key: string]: string;
 }
@@ -17,7 +19,7 @@ function validBraces(braces: string): boolean {
     if (matches[currentBrace]) {
       stack.push(currentBrace);
     } else {
-      const lastBrace: any = stack.pop();
+      const lastBrace: Any = stack.pop();
 
       if (currentBrace !== matches[lastBrace]) {
         return false;

kata/7 kyu/area-of-a-circle/index.ts

@@ -1,8 +1,8 @@
-function isNumber(n: any): n is number {
+function isNumber(n: unknown): n is number {
   return typeof n === 'number';
 }
 
-function circleArea(radius: any): number | false {
+function circleArea(radius: unknown): number | false {
   if (!isNumber(radius) || radius <= 0) {
     return false;
   }

kata/7 kyu/deodorant-evaporator/index.ts

@@ -1,5 +1,3 @@
-/* eslint-disable camelcase */
-
 function evaporator(_content: number, evap_per_day: number, threshold: number): number {
   return Math.ceil(Math.log(threshold / 100) / Math.log(1 - evap_per_day / 100));
 }

kata/7 kyu/fixme-get-full-name/index.ts

@@ -1,5 +1,3 @@
-/* eslint-disable no-useless-constructor */
-
 class Dinglemouse {
   private firstName: string;
   private lastName: string;

kata/7 kyu/flatten-1/index.ts

@@ -1,4 +1,6 @@
-function flatten(arr: any[]): any[] {
+import type { Any } from '../../@types/types.ts';
+
+function flatten(arr: Any[]): Any[] {
   return [].concat(...arr);
 }
 

kata/7 kyu/fun-with-es6-classes-number-2-animals-and-inheritance/index.ts

@@ -1,5 +1,3 @@
-/* eslint-disable max-classes-per-file */
-
 class Animal {
   public name: string;
   public age: number;

kata/7 kyu/gauss-needs-help-sums-of-a-lot-of-numbers/index.ts

@@ -1,4 +1,6 @@
-function f(n?: any): number | boolean {
+import type { Any } from '../../@types/types.ts';
+
+function f(n?: Any): number | boolean {
   if (!Number.isInteger(n) || n < 1) {
     return false;
   }

kata/7 kyu/last/index.ts

@@ -1,5 +1,7 @@
+import type { Any } from '../../@types/types.ts';
+
 function last<T>(...list: T[] | T[][]): T {
-  const lastElement: any = list[list.length - 1];
+  const lastElement: Any = list[list.length - 1];
 
   return lastElement[lastElement.length - 1] || lastElement;
 }

kata/7 kyu/list-filtering/index.test.ts

@@ -1,5 +1,3 @@
-/* eslint-disable camelcase */
-
 import assert from 'node:assert/strict';
 import { describe, it } from 'node:test';
 import filter_list from './index.ts';

kata/7 kyu/list-filtering/index.ts

@@ -1,6 +1,6 @@
-/* eslint-disable camelcase */
+import type { Any } from '../../@types/types.ts';
 
-function filter_list(l: any[]): number[] {
+function filter_list(l: Any[]): number[] {
   return l.filter(Number.isInteger);
 }
 

kata/7 kyu/santaclausable-interface/index.test.ts

@@ -1,5 +1,3 @@
-/* eslint-disable no-console */
-
 import assert from 'node:assert/strict';
 import { describe, it } from 'node:test';
 import isSantaClausable from './index.ts';

kata/7 kyu/shorter-concat-reverse-longer/index.test.ts

@@ -1,5 +1,3 @@
-/* eslint-disable camelcase */
-
 import assert from 'node:assert/strict';
 import { describe, it } from 'node:test';
 import shorter_reverse_longer from './index.ts';

kata/7 kyu/shorter-concat-reverse-longer/index.ts

@@ -1,5 +1,3 @@
-/* eslint-disable camelcase */
-
 function shorter_reverse_longer(a: string, b: string): string {
   const shorter = a.length < b.length ? a : b;
   const longer = a.length >= b.length ? a : b;

kata/7 kyu/sum-of-odd-cubed-numbers/index.ts

@@ -1,4 +1,6 @@
-function cubeOdd(arr: any[]): number | undefined {
+import type { Any } from '../../@types/types.ts';
+
+function cubeOdd(arr: Any[]): number | undefined {
   let sum = 0;
 
   for (let i = 0; i < arr.length; i += 1) {

kata/8 kyu/a-needle-in-the-haystack/index.ts

@@ -1,4 +1,6 @@
-function findNeedle(haystack: any[]): string {
+import type { Any } from '../../@types/types.ts';
+
+function findNeedle(haystack: Any[]): string {
   const position = haystack.indexOf('needle');
 
   return `found the needle at position ${position}`;

kata/8 kyu/basic-subclasses-adam-and-eve/index.ts

@@ -1,5 +1,3 @@
-/* eslint-disable max-classes-per-file */
-
 class Human {}
 
 class Man extends Human {}
@@ -14,4 +12,4 @@ class God {
 
 export default God;
 
-export { Man, Woman, Human };
+export { Human, Man, Woman };

kata/8 kyu/calculate-average/index.test.ts

@@ -1,5 +1,3 @@
-/* eslint-disable camelcase */
-
 import assert from 'node:assert/strict';
 import { describe, it } from 'node:test';
 import find_average from './index.ts';

kata/8 kyu/calculate-average/index.ts

@@ -1,5 +1,3 @@
-/* eslint-disable camelcase */
-
 function find_average(array: number[]): number {
   return array.reduce((accumulator, currentValue) => accumulator + currentValue, 0) / array.length;
 }

kata/8 kyu/classic-hello-world/index.test.ts

@@ -1,5 +1,3 @@
-/* eslint-disable no-console */
-
 import assert from 'node:assert/strict';
 import { describe, it, mock } from 'node:test';
 import Solution from './index.ts';

kata/8 kyu/classic-hello-world/index.ts

@@ -1,5 +1,3 @@
-/* eslint-disable no-console */
-
 class Solution {
   static main(): void {
     console.log('Hello World!');

kata/8 kyu/even-or-odd/index.test.ts

@@ -1,5 +1,3 @@
-/* eslint-disable camelcase */
-
 import assert from 'node:assert/strict';
 import { describe, it } from 'node:test';
 import even_or_odd from './index.ts';

kata/8 kyu/even-or-odd/index.ts

@@ -1,5 +1,3 @@
-/* eslint-disable camelcase */
-
 function even_or_odd(number: number): string {
   return number % 2 ? 'Odd' : 'Even';
 }

kata/8 kyu/find-the-smallest-integer-in-the-array/index.ts

@@ -1,5 +1,3 @@
-/* eslint-disable class-methods-use-this */
-
 class SmallestIntegerFinder {
   findSmallestInt(args: number[]): number {
     return Math.min(...args);

kata/8 kyu/lexical-this/index.test.ts

@@ -1,5 +1,3 @@
-/* eslint-disable no-underscore-dangle */
-
 import assert from 'node:assert/strict';
 import { describe, it } from 'node:test';
 import Person from './index.ts';

kata/8 kyu/lexical-this/index.ts

@@ -1,5 +1,3 @@
-/* eslint-disable no-underscore-dangle */
-
 interface Person {
   _name: string;
   _friends: string[];

kata/8 kyu/pillars/index.ts

@@ -1,5 +1,3 @@
-/* eslint-disable camelcase */
-
 function pillars(num_pill: number, dist: number, width: number): number {
   if (num_pill < 2) {
     return 0;

kata/8 kyu/printing-array-elements-with-comma-delimiters/index.ts

@@ -1,4 +1,4 @@
-function printArray(array: any[]): string {
+function printArray<T>(array: T[]): string {
   return array.join(',');
 }
 

kata/8 kyu/repeatit/index.ts

@@ -1,4 +1,6 @@
-function repeatIt(str: any, n: number): string | 'Not a string' {
+import type { Any } from '../../@types/types.ts';
+
+function repeatIt(str: Any, n: number): string | 'Not a string' {
   if (typeof str !== 'string') {
     return 'Not a string';
   }

kata/8 kyu/the-if-function/index.test.ts

@@ -1,5 +1,3 @@
-/* eslint-disable no-console */
-
 import assert from 'node:assert/strict';
 import { describe, it, mock } from 'node:test';
 import _if from './index.ts';

kata/8 kyu/the-if-function/index.ts

@@ -1,5 +1,3 @@
-/* eslint-disable no-underscore-dangle */
-
 function _if(bool: boolean, func1: () => void, func2: () => void): void {
   return bool ? func1() : func2();
 }

kata/8 kyu/training-js-number-1-create-your-first-js-function-and-print-helloworld/index.test.ts

@@ -1,5 +1,3 @@
-/* eslint-disable no-console */
-
 import assert from 'node:assert/strict';
 import { describe, it, mock } from 'node:test';
 import helloWorld from './index.ts';

kata/8 kyu/training-js-number-1-create-your-first-js-function-and-print-helloworld/index.ts

@@ -1,8 +1,5 @@
-/* eslint-disable no-console */
-/* eslint-disable no-var */
-
 function helloWorld(): void {
-  var str = 'Hello World!';
+  const str = 'Hello World!';
 
   console.log(str);
 }

kata/8 kyu/training-js-number-6-basic-data-types-boolean-and-conditional-statements-if-dot-else/index.test.ts

@@ -1,6 +1,4 @@
 /* eslint-disable @typescript-eslint/ban-ts-comment */
-/* eslint-disable no-bitwise */
-
 // @ts-nocheck
 
 import assert from 'node:assert/strict';

kata/@types/types.ts

@@ -0,0 +1,4 @@
+// eslint-disable-next-line @typescript-eslint/no-explicit-any
+type Any = any;
+
+export type { Any };