Implements own times func instead of ramda (#7)

Author: rgbabaev

src/core/helpers.js

@@ -1,4 +1,4 @@
-import { times } from "ramda";
+import times from '../lib/times.mjs';
 
 /*
      mines  opened
@@ -32,7 +32,6 @@ export const getCellNeighborMines = (cell = 0) => cell >> 3;
 // export const unflagCell = (cell = 0) => cell & (~CELL_FLAGGED);
 export const toggleCellFlag = (cell = 0) => cell ^ CELL_FLAGGED;
 
-
 export function getFreeRandomCell([width, height], flatBusyCells) {
   const sortedBusyCells = flatBusyCells
     .slice(0)
@@ -88,7 +87,7 @@ export const getNeighborCells = ([width, height], i) => {
 export const calcHeatMap = ([width, height], mines = []) => {
   const map = [];
 
-  mines.forEach(cell => {
+  mines.forEach((cell) => {
     const col = cell % width;
     const row = Math.floor(cell / width);
 
@@ -114,7 +113,7 @@ export function genCells(arena, minesCount, clicked) {
   const heatMap = calcHeatMap(arena, mines);
 
   const cells = times(
-    i => (heatMap[i] << 3) + (+mines.includes(i) << 1),
+    (i) => (heatMap[i] << 3) + (+mines.includes(i) << 1),
     arena[0] * arena[1]
   );
 

src/lib/times.mjs

@@ -0,0 +1,9 @@
+export default function times(fn, n) {
+  const result = new Array(n);
+
+  for (let i = 0; i < n; i++) {
+    result[i] = fn(i);
+  }
+
+  return result;
+}

src/lib/times.test.mjs

@@ -0,0 +1,27 @@
+import { describe, it } from 'node:test';
+import assert from 'node:assert';
+import times from './times.mjs';
+// import { times } from 'ramda';
+
+describe('Runs function', () => {
+  it('0 times', ({ mock }) => {
+    const fn = mock.fn((i) => i * 2);
+    const result = times(fn, 0);
+    assert.strictEqual(fn.mock.callCount(), 0);
+    assert.deepStrictEqual(result, []);
+  });
+
+  it('1 time', ({ mock }) => {
+    const fn = mock.fn((i) => i * 2);
+    const result = times(fn, 1);
+    assert.strictEqual(fn.mock.callCount(), 1);
+    assert.deepStrictEqual(result, [0]);
+  });
+
+  it('8 times', ({ mock }) => {
+    const fn = mock.fn((i) => i * 2);
+    const result = times(fn, 8);
+    assert.strictEqual(fn.mock.callCount(), 8);
+    assert.deepStrictEqual(result, [0, 2, 4, 6, 8, 10, 12, 14]);
+  });
+});