newbymikhail/dist/games/progression.js

brain-games project for student

'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});

var _hexletPairs = require('hexlet-pairs');

var _game = require('../game');

var _game2 = _interopRequireDefault(_game);

var _utils = require('../utils');

var _utils2 = _interopRequireDefault(_utils);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

var descriptionGame = 'What number is missing in this progression?';
var progressionLength = 10;
var max = 20;
var maxStep = 5;
var minStep = 1;

var getProgression = function getProgression() {
  var firstElement = (0, _utils2.default)(max);
  var step = (0, _utils2.default)(maxStep, minStep);
  var progression = [firstElement];
  while (progression.length <= progressionLength) {
    progression.push(firstElement + step * progression.length);
  }
  return progression;
};

var questionAndAnswer = function questionAndAnswer() {
  var progression = getProgression();
  var indexOfAnswer = (0, _utils2.default)(progressionLength);
  var answer = progression[indexOfAnswer];
  progression[indexOfAnswer] = '..';
  var question = progression.reduce(function (acc, element) {
    return '' + acc + element + ' ';
  }, '');
  return (0, _hexletPairs.cons)(question, '' + answer);
};

exports.default = function () {
  return (0, _game2.default)(descriptionGame, questionAndAnswer);
};
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