check if using the new methods helps

.github/workflows/build.yml

@@ -24,7 +24,7 @@ jobs:
     - name: Use Node.js
       uses: actions/setup-node@v4
       with:
-        node-version: 'lts/*'
+        node-version: '>=22'
         cache: yarn
 
     - run: yarn install

CHANGELOG.md

@@ -4,6 +4,10 @@ Note: Many earlier versions are not specified, that's too much work.
 
 When a `@types` dependency updates, they almost always don't affect anything.
 
+## v0.36.2
+
+- (code) Use new Set methods, simplifies code. This shouldn't break support for old browsers.
+
 ## v0.36.1
 
 - (css) Fix explanation changing the size of Aside

README.md

@@ -53,6 +53,6 @@ You can run `yarn install` and then `yarn npm audit` for the full report.
 
 ## Node version
 
-This project does not seem to use node, but just in case, this uses `String.prototype.replaceAll`, so your node version must be `>=15.0.0`.
+This project does not seem to use node, but just in case, this uses `Set.prototype.isSubsetOf`, so your node version must be `>=22.0.0`.
 
 Also, `@types/node` is usually on one of the latest versions, since github actions eventually deprecates old versions of node. If `@types/node` is incompatible with an earlier version of node, you can try downgrading the dependency, or post an issue if it doesn't work. Alternatively, if you're on gitpod run `nvm install 16` or higher.

package.json

@@ -1,6 +1,6 @@
 {
   "name": "solver",
-  "version": "0.36.1",
+  "version": "0.36.2",
   "private": true,
   "homepage": "https://icecream17.github.io/solver",
   "dependencies": {
@@ -17,7 +17,7 @@
   },
   "devDependencies": {
     "@types/jest": "^27.0.2",
-    "@types/node": "^20.0.0",
+    "@types/node": "^22.0.0",
     "@types/react": "^17.0.34",
     "@types/react-dom": "^17.0.11",
     "eslint-plugin-jest-dom": "^4.0.0",
@@ -39,10 +39,7 @@
   },
   "browserslist": {
     "production": [
-      "supports prefers-color-scheme",
-      "not ios_saf < 14.5",
-      "not safari < 14.1",
-      "not firefox < 90",
+      "last 1 year",
       "not dead"
     ],
     "development": [
@@ -52,7 +49,7 @@
     ]
   },
   "engines": {
-    "node": ">=15.0.0"
+    "node": ">=22.0.0"
   },
   "packageManager": "[email protected]"
 }

src/Api/Strategies/pairCoversGroup.ts

@@ -25,15 +25,15 @@ function _checkPair(
             //     ^ group [sees A or B] [has A or B]
             // Avoid eliminating everything
             if (group_A.size === 0) {
-                const [groupIndex] = groupInfo(prop, [...group_A])
+                const [groupIndex] = groupInfo(prop, group_A)
                 window._custom.alert(`${prop} ${GRP_NAMES[prop][groupIndex]} has no possibilities for ${candidateA} !`)
                 return "error"
             }
 
             // Condition 2: The two cells see all cells in the group that have A.
-            if (isSubset(group_A, affectsEitherAorB)) {
+            if (group_A.isSubsetOf(affectsEitherAorB)) {
                 // Elimination type A
-                const [, allOfGroup, remaining] = groupInfo(prop, [...group_A])
+                const [, allOfGroup, remaining] = groupInfo(prop, group_A)
 
                 // Strategy does not work when X or Y is in the group
                 if (allOfGroup.includes(cellA) || allOfGroup.includes(cellB)) {

src/Api/Strategies/twoMinusOneLines.ts

@@ -1,6 +1,6 @@
 import { ALL_CANDIDATES, IndexToNine, INDICES_TO_NINE, SudokuDigits } from "../../Types";
 import PureSudoku from "../Spaces/PureSudoku";
-import { affects, CellID, setDifference, sharedInArrays } from "../Utils";
+import { affects, CellID, sharedInArrays } from "../Utils";
 import { colorGroup } from "../Utils.dependent";
 import { __incrementMapValue } from "./skyscraper";
 
@@ -101,7 +101,7 @@ export function _innerGroupSubtractionLogic(
 
    if (successcount) {
       const nonExtraLineCells = __inLine(sumLines, nonExtraLine as IndexToNine, pendLineProp)
-      const extraCells = setDifference(sumLines, nonExtraLineCells)
+      const extraCells = sumLines.difference(nonExtraLineCells)
       colorGroup(sudoku, extraCells, candidate, "orange")
       colorGroup(sudoku, nonExtraLineCells, candidate)
       return {

src/Api/Utils.ts

@@ -168,22 +168,32 @@ export function getIDFromIndexWithinBox(indexOfBox: IndexToNine, indexInBox: Ind
    return id(boxRow * 3 + withinRow as IndexToNine, boxColumn * 3 + withinColumn as IndexToNine)
 }
 
-export function groupInfo(type: GrpTyp, cells: CellID[]) {
+function elementInIterable<T>(iter: Iterable<T>): T | undefined {
+   for (const elem of iter) {
+      return elem
+   }
+}
+
+/**
+ * @param cells A nonempty iterable of `CellID`
+ */
+export function groupInfo(type: GrpTyp, cells: Iterable<CellID>) {
    let groupIndex: IndexToNine
    let cellsInGroup
+   const arbitraryCell = elementInIterable(cells) as CellID // If it is undefined, it will error at runtime
    switch (type) {
       case "row": {
-         groupIndex = cells[0].row
+         groupIndex = arbitraryCell.row
          cellsInGroup = INDICES_TO_NINE.map(indice => id(groupIndex, indice))
          break
       }
       case "column": {
-         groupIndex = cells[0].column
+         groupIndex = arbitraryCell.column
          cellsInGroup = INDICES_TO_NINE.map(indice => id(indice, groupIndex))
          break
       }
       case "box": {
-         groupIndex = boxAt(cells[0].row, cells[0].column)
+         groupIndex = boxAt(arbitraryCell.row, arbitraryCell.column)
          cellsInGroup = INDICES_TO_NINE.map(indice => getIDFromIndexWithinBox(groupIndex, indice))
          break
       }

src/Elems/Version.tsx

@@ -9,7 +9,7 @@ import StaticComponent from './StaticComponent';
  * <Version />
  */
 function Version () {
-   return <span className="Version">v0.36.1</span>
+   return <span className="Version">v0.36.2</span>
 }
 
 export default StaticComponent(Version)

yarn.lock

@@ -3822,12 +3822,12 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@types/node@npm:^20.0.0":
-  version: 20.16.5
-  resolution: "@types/node@npm:20.16.5"
+"@types/node@npm:^22.0.0":
+  version: 22.5.5
+  resolution: "@types/node@npm:22.5.5"
   dependencies:
     undici-types: ~6.19.2
-  checksum: f38b7bd8c4993dcf38943afa2ffdd7dfd18fc94f8f3f28d0c1045a10d39871a6cc1b8f8d3bf0c7ed848457d0e1d283482f6ca125579c13fed1b7575d23e8e8f5
+  checksum: 1f788966ff7df07add0af3481fb68c7fe5091cc72a265c671432abb443788ddacca4ca6378af64fe100c20f857c4d80170d358e66c070171fcea0d4adb1b45b1
   languageName: node
   linkType: hard
 
@@ -5335,17 +5335,10 @@ __metadata:
   languageName: node
   linkType: hard
 
-"caniuse-lite@npm:^1.0.0, caniuse-lite@npm:^1.0.30001259, caniuse-lite@npm:^1.0.30001272, caniuse-lite@npm:^1.0.30001280":
-  version: 1.0.30001651
-  resolution: "caniuse-lite@npm:1.0.30001651"
-  checksum: c31a5a01288e70cdbbfb5cd94af3df02f295791673173b8ce6d6a16db4394a6999197d44190be5a6ff06b8c2c7d2047e94dfd5e5eb4c103ab000fca2d370afc7
-  languageName: node
-  linkType: hard
-
-"caniuse-lite@npm:^1.0.30001646":
-  version: 1.0.30001653
-  resolution: "caniuse-lite@npm:1.0.30001653"
-  checksum: 289cf06c26a46f3e6460ccd5feffa788ab0ab35d306898c48120c65cfb11959bfa560e9f739393769b4fd01150c69b0747ad3ad5ec3abf3dfafd66df3c59254e
+"caniuse-lite@npm:^1.0.0, caniuse-lite@npm:^1.0.30001259, caniuse-lite@npm:^1.0.30001272, caniuse-lite@npm:^1.0.30001280, caniuse-lite@npm:^1.0.30001646":
+  version: 1.0.30001662
+  resolution: "caniuse-lite@npm:1.0.30001662"
+  checksum: 7a6a0c0d9f7c4a1c51de02838eb47f41f36fff57a77b846c8faed35ba9afba17b9399bc00bd637e5c1663cbc132534085d91151de48edca2ad8932a5d87e23af
   languageName: node
   linkType: hard
 
@@ -13394,7 +13387,7 @@ resolve@^2.0.0-next.3:
     "@testing-library/react": ^12.1.2
     "@testing-library/user-event": ^13.5.0
     "@types/jest": ^27.0.2
-    "@types/node": ^20.0.0
+    "@types/node": ^22.0.0
     "@types/react": ^17.0.34
     "@types/react-dom": ^17.0.11
     eslint-plugin-jest-dom: ^4.0.0