calculate total bonus and cost if buy all numbers

.gitignore

@@ -0,0 +1 @@
+node_modules

index.js

@@ -1,28 +1,48 @@
-var numeral = require('numeral');
-var Combinatorics = require('js-combinatorics');
+const { Combination } = require('js-combinatorics');
+
+function printProgress(progress) {
+    process.stdout.clearLine(0);
+    process.stdout.cursorTo(0);
+    process.stdout.write(progress);
+}
 
 (function () {
     'use strict';
-    var winnings = []; // NTD
-    winnings.push({m: 6, s: null, bouns: 39299711});
-    winnings.push({m: 5, s: 1, bouns: 3230113});
-    winnings.push({m: 5, s: null, bouns: 49011});
-    winnings.push({m: 4, s: 1, bouns: 11777});
-    winnings.push({m: 4, s: null, bouns: 1655});
-    winnings.push({m: 3, s: 1, bouns: 1000});
-    winnings.push({m: 2, s: 1, bouns: 400});
-    winnings.push({m: 3, s: null, bouns: 400});
+    const costPerTicket = 50; // NTD
+    const randomNumbers = [1, 2, 3, 4, 5, 6];
+    const randomSpecialNumber = 7;
+    const prizes = {}; // NTD			
+    prizes['6:0'] = { name: '頭獎', m: 6, s: null, bonus: 104538797, acc: 0 };
+    prizes['5:1'] = { name: '貳獎', m: 5, s: 1, bonus: 10089281, acc: 0 };
+    prizes['5:0'] = { name: '參獎', m: 5, s: null, bonus: 120323, acc: 0 };
+    prizes['4:1'] = { name: '肆獎', m: 4, s: 1, bonus: 18129, acc: 0 };
+    prizes['4:0'] = { name: '伍獎', m: 4, s: null, bonus: 2000, acc: 0 };
+    prizes['3:1'] = { name: '陸獎', m: 3, s: 1, bonus: 1000, acc: 0 };
+    prizes['2:1'] = { name: '柒獎', m: 2, s: 1, bonus: 400, acc: 0 };
+    prizes['3:0'] = { name: '普獎', m: 3, s: null, bonus: 400, acc: 0 };
+
+    const allNumbers = new Array(49).fill(1).map(function (v, i) {return v + i;});
+    const allCombinations = new Combination(allNumbers, 6);
 
-    var allNumbers = new Array(49).fill(1).map(function (v, i) {return v + i;}),
-        allCombinations = Combinatorics.bigCombination(allNumbers, 6);
+    console.log(`Cost for buying all combinations: NTD ${
+        new Intl.NumberFormat().format(allCombinations.length * BigInt(costPerTicket))
+    }`);
 
-    function hasBalls(nums, matchs) {
-        return matchs.every(function (match) {
-            return nums.indexOf(match) > -1;
-        });
+    let totalBonus = 0n;
+    for(let i = 0n; i < allCombinations.length; i++) {
+        const comb = allCombinations.nth(i);
+        const matchedNumbers = comb.filter(n => randomNumbers.includes(n)).length;
+        const matchedSpecialNumber = comb.includes(randomSpecialNumber) ? 1 : 0;
+        const prizeKey = `${matchedNumbers}:${matchedSpecialNumber}`;
+        const matchedPrize = prizes[prizeKey];
+        if (matchedPrize) {
+            matchedPrize.acc += matchedPrize.bonus;
+            totalBonus += BigInt(matchedPrize.bonus);
+            printProgress(`Progress: ${i + 1n}/${allCombinations.length}`);
+        }
     }
 
-    console.log(allCombinations.filter(function (nums) {
-        return hasBalls(nums, [1, 2, 3, 4, 5, 6]);
-    }));
+    console.log(`Bonus if buying all tickets: NTD ${
+        new Intl.NumberFormat().format(totalBonus)
+    }`);
 }());

package.json

@@ -4,8 +4,7 @@
   "description": "try to analyze the winnings of lottery",
   "main": "index.js",
   "dependencies": {
-    "js-combinatorics": "^0.5.2",
-    "numeral": "^2.0.6"
+    "js-combinatorics": "2.1.1"
   },
   "devDependencies": {},
   "scripts": {