brain-games-irastypain/dist/games/progression.js

This package is implementation of first project at Hexlet

'use strict';

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

var _ = require('..');

var _qa = require('../lib/qa');

var _math = require('../lib/math');

exports.default = function () {
  var description = 'What number is missing in this progression?';
  var generateQA = function generateQA() {
    var minNumber = 1;
    var maxNumber = 1000;
    var startNumber = (0, _math.getRandomInt)(minNumber, maxNumber);

    var gain = 2;
    var countItems = 10;
    var progressionItems = (0, _math.genArithmeticProgression)(startNumber, gain, countItems);

    var startIndex = 0;
    var missingItemIndex = (0, _math.getRandomInt)(startIndex, countItems - 1);

    var question = progressionItems.map(function (item, index) {
      if (index === missingItemIndex) {
        return '..';
      }
      return String(item);
    }).join(' ');

    var answer = progressionItems[missingItemIndex];

    return (0, _qa.makeQA)(question, answer);
  };

  (0, _.runGame)(description, generateQA);
};
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