done 8th step of the project

Author: Michael57e

README.md

@@ -11,3 +11,7 @@
 
 ## Brain GCD
 [![asciicast](https://asciinema.org/a/nP0uI7dz54y5BVvA2rY9Fk58g.svg)](https://asciinema.org/a/nP0uI7dz54y5BVvA2rY9Fk58g)
+
+## Brain Progression
+[![asciicast](https://asciinema.org/a/FwJq0UlMtfHyl7DVNShYaGBFR.svg)](https://asciinema.org/a/FwJq0UlMtfHyl7DVNShYaGBFR)
+

bin/brain-progression.js

@@ -0,0 +1,4 @@
+#!/usr/bin/env node
+import runProgressionGame from '../src/games/progression.js'
+
+runProgressionGame()

demo.cast5

@@ -0,0 +1,57 @@
+{"version": 2, "width": 80, "height": 24, "timestamp": 1758535058, "env": {"SHELL": "/bin/bash", "TERM": "xterm-256color"}}
+[0.223326, "o", "\u001b[?2004h\u001b]0;michael@michael-Nitro-ANV15-51: ~/qa-auto-engineer-javascript-project-44\u0007\u001b[01;32mmichael@michael-Nitro-ANV15-51\u001b[00m:\u001b[01;34m~/qa-auto-engineer-javascript-project-44\u001b[00m$ "]
+[2.171645, "o", "\u001b[7mbrain-p\u001b[27m\u001b[7mr\u001b[27m\u001b[7mogression\u001b[27m"]
+[2.925325, "o", "\u001b[A\r\u001b]0;michael@michael-Nitro-ANV15-51: ~/qa-auto-engineer-javascript-project-44\u0007\u001b[01;32mmichael@michael-Nitro-ANV15-51\u001b[00m:\u001b[01;34m~/qa-auto-engineer-javascript-project-44\u001b[00m$ brain-progression\r\n"]
+[2.925482, "o", "\u001b[?2004l\r"]
+[2.971889, "o", "Welcome to the Brain Games!\r\n"]
+[2.971993, "o", "What number is missing in the progression?\r\n"]
+[2.97278, "o", "May I have your name? "]
+[4.887767, "o", "M"]
+[5.157917, "o", "i"]
+[5.37143, "o", "c"]
+[5.633196, "o", "h"]
+[5.742113, "o", "a"]
+[5.968377, "o", "e"]
+[6.191171, "o", "l"]
+[6.823202, "o", "\r\n"]
+[6.824584, "o", "Hello, Michael!\r\n"]
+[6.82467, "o", "Question: 2 .. 6 8 10 12 14 16 18 20\r\n"]
+[6.824896, "o", "Your answer: "]
+[9.52151, "o", "4"]
+[10.642465, "o", "\r\n"]
+[10.643201, "o", "Correct!\r\nQuestion: .. 21 25 29 33 37 41 45 49 53\r\n"]
+[10.643303, "o", "Your answer: "]
+[19.235123, "o", "1"]
+[19.371739, "o", "8"]
+[20.163127, "o", "\r\n"]
+[20.163484, "o", "'18' is wrong answer ;(. Correct answer was '17'.\r\n"]
+[20.163555, "o", "Let's try again, Michael!\r\n"]
+[20.171226, "o", "\u001b[?2004h\u001b]0;michael@michael-Nitro-ANV15-51: ~/qa-auto-engineer-javascript-project-44\u0007\u001b[01;32mmichael@michael-Nitro-ANV15-51\u001b[00m:\u001b[01;34m~/qa-auto-engineer-javascript-project-44\u001b[00m$ "]
+[25.384141, "o", "\u001b[7mbrain-p\u001b[27m\u001b[7mr\u001b[27m\u001b[7mogression\u001b[27m"]
+[27.251469, "o", "\u001b[A\r\u001b]0;michael@michael-Nitro-ANV15-51: ~/qa-auto-engineer-javascript-project-44\u0007\u001b[01;32mmichael@michael-Nitro-ANV15-51\u001b[00m:\u001b[01;34m~/qa-auto-engineer-javascript-project-44\u001b[00m$ brain-progression\r\n\u001b[?2004l\r"]
+[27.286314, "o", "Welcome to the Brain Games!\r\nWhat number is missing in the progression?\r\n"]
+[27.287316, "o", "May I have your name? "]
+[29.241781, "o", "S"]
+[29.577165, "o", "a"]
+[29.762741, "o", "m"]
+[30.580905, "o", "\r\n"]
+[30.581754, "o", "Hello, Sam!\r\n"]
+[30.581826, "o", "Question: 14 .. 20 23 26 29 32 35 38 41\r\n"]
+[30.582079, "o", "Your answer: "]
+[35.260902, "o", "1"]
+[35.672464, "o", "7"]
+[37.222301, "o", "\r\n"]
+[37.223142, "o", "Correct!\r\nQuestion: 14 18 22 26 30 34 38 .. 46 50\r\n"]
+[37.223362, "o", "Your answer: "]
+[42.656471, "o", "4"]
+[42.729159, "o", "2"]
+[44.865058, "o", "\r\n"]
+[44.865478, "o", "Correct!\r\n"]
+[44.865716, "o", "Question: .. 16 18 20 22 24 26 28 30 32\r\nYour answer: "]
+[50.317323, "o", "1"]
+[50.421276, "o", "4"]
+[51.396913, "o", "\r\n"]
+[51.397303, "o", "Correct!\r\n"]
+[51.397477, "o", "Congratulations, Sam!\r\n"]
+[51.404156, "o", "\u001b[?2004h\u001b]0;michael@michael-Nitro-ANV15-51: ~/qa-auto-engineer-javascript-project-44\u0007\u001b[01;32mmichael@michael-Nitro-ANV15-51\u001b[00m:\u001b[01;34m~/qa-auto-engineer-javascript-project-44\u001b[00m$ "]
+[57.294476, "o", "\u001b[?2004l\r\r\nexit\r\n"]

package.json

@@ -21,7 +21,8 @@
     "brain-games": "bin/brain-games.js",
     "brain-even": "bin/brain-even.js",
     "brain-calc": "bin/brain-calc.js",
-    "brain-gcd": "bin/brain-gcd.js"
+    "brain-gcd": "bin/brain-gcd.js",
+    "brain-progression": "bin/brain-progression.js"
   },
   "dependencies": {
     "readline-sync": "^1.4.10"

src/games/progression.js

@@ -0,0 +1,31 @@
+import runEngine from '../index.js'
+import getRandomNumber from '../utils.js'
+
+const rule = 'What number is missing in the progression?'
+
+const getProgression = (start, step, length = 10) => {
+  const progression = []
+  for (let i = 0; i < length; i += 1) {
+    progression.push(start + i * step)
+  }
+  return progression
+}
+
+  const makeRound = () => {
+    const start = getRandomNumber(1, 20)
+    const step = getRandomNumber(1, 5)
+    const length = 10
+    const progression = getProgression(start, step, length)
+
+    const hiddenIndex = getRandomNumber(0, length - 1)
+    const correctAnswer = String(progression[hiddenIndex])
+
+    progression[hiddenIndex] = '..'
+
+    const question = progression.join(' ')
+    return [question, correctAnswer]
+  }
+
+const runProgressionGame = () => runEngine(rule, makeRound)
+
+export default runProgressionGame