Add Prettier (#100)

Author: simonespa

.prettierignore

@@ -0,0 +1,7 @@
+.github
+.nyc_output
+node_modules
+coverage
+pnpm-lock.yaml
+CODE_OF_CONDUCT.md
+LICENSE

.prettierrc

@@ -2,10 +2,18 @@ import js from "@eslint/js";
 import globals from "globals";
 import tseslint from "typescript-eslint";
 import { defineConfig } from "eslint/config";
-
+import eslintConfigPrettier from "eslint-config-prettier/flat";
 
 export default defineConfig([
-  { files: ["**/*.{js,mjs,cjs,ts,mts,cts}"], plugins: { js }, extends: ["js/recommended"] },
-  { files: ["**/*.{js,mjs,cjs,ts,mts,cts}"], languageOptions: { globals: globals.browser } },
+  {
+    files: ["**/*.{js,mjs,cjs,ts,mts,cts}"],
+    plugins: { js },
+    extends: ["js/recommended"],
+  },
+  {
+    files: ["**/*.{js,mjs,cjs,ts,mts,cts}"],
+    languageOptions: { globals: globals.browser },
+  },
   tseslint.configs.recommended,
+  eslintConfigPrettier,
 ]);

eslint.config.js

@@ -7,6 +7,7 @@
     "clean": "rm -rf .nyc_output coverage dist",
     "test": "nyc mocha 'src/**/*.test.ts' --require=tsx",
     "lint": "eslint 'src/**/*.ts'",
+    "prettier": "prettier --write .",
     "coverage": "nyc report --reporter html && open coverage/index.html",
     "coverage:check": "nyc check-coverage --lines 90 --branches 80 --statements 90"
   },
@@ -18,9 +19,11 @@
     "@types/sinon": "^17.0.4",
     "chai": "^5.2.1",
     "eslint": "^9.31.0",
+    "eslint-config-prettier": "^10.1.5",
     "globals": "^16.3.0",
     "mocha": "^11.7.1",
     "nyc": "^17.1.0",
+    "prettier": "3.6.2",
     "sinon": "^21.0.0",
     "tsx": "^4.20.3",
     "typescript": "^5.8.3",

package.json

@@ -1,5 +1,5 @@
-import { expect } from 'chai';
-import fibonacci from './fibonacci.ts';
+import { expect } from "chai";
+import fibonacci from "./fibonacci.ts";
 
 describe("fibonacci", function () {
   const tests = [

pnpm-lock.yaml

@@ -1,7 +1,7 @@
-import { expect } from 'chai';
-import gridTraveller from './grid-traveller.ts';
+import { expect } from "chai";
+import gridTraveller from "./grid-traveller.ts";
 
-describe('gridTraveller', () => {
+describe("gridTraveller", () => {
   const tests = [
     { rows: 0, columns: 0, expected: 0 },
     { rows: 0, columns: 1, expected: 0 },

src/algorithms/dynamic-programming/fibonacci.test.ts

@@ -24,7 +24,11 @@
  * @param buffer the object used for memoisation
  * @returns the total number of ways to travel on a N by M grid
  */
-export default function gridTraveller(rows: number, columns: number, buffer: object = {}): number {
+export default function gridTraveller(
+  rows: number,
+  columns: number,
+  buffer: object = {},
+): number {
   const key = getKey(rows, columns);
   if (key in buffer) return buffer[key];
   if (rows <= 0 || columns <= 0) return 0;

src/algorithms/dynamic-programming/grid-traveller.test.ts

@@ -1,5 +1,5 @@
-import { expect } from 'chai';
-import canSum from './can-sum.ts';
+import { expect } from "chai";
+import canSum from "./can-sum.ts";
 
 describe("canSum", function () {
   const tests = [

src/algorithms/dynamic-programming/grid-traveller.ts

@@ -23,7 +23,11 @@
  * @param buffer the object used for memoisation
  * @returns true if the target sun can be constructed
  */
-export default function canSum(targetSum: number, numbers: number[], buffer: object = {}): boolean {
+export default function canSum(
+  targetSum: number,
+  numbers: number[],
+  buffer: object = {},
+): boolean {
   if (targetSum in buffer) return buffer[targetSum];
   if (targetSum === 0) return true;
   if (targetSum < 0) return false;