@nox_wave/hexlet-braingames/dist/games/progression.js

Brain Games. A set of mini-games.

'use strict';

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

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

var _ = require('..');

var _2 = _interopRequireDefault(_);

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

var _utils2 = _interopRequireDefault(_utils);

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

function _toConsumableArray(arr) { if (Array.isArray(arr)) { for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) { arr2[i] = arr[i]; } return arr2; } else { return Array.from(arr); } }

var progressionLength = 10;

exports.default = function () {
  var addNumberToSequence = function addNumberToSequence(sequence, maxSequenceLength, commonDiff) {
    if (sequence.length === maxSequenceLength) return sequence;
    var lastElement = sequence[sequence.length - 1];
    var nextElement = lastElement + commonDiff;
    return addNumberToSequence([].concat(_toConsumableArray(sequence), [nextElement]), maxSequenceLength, commonDiff);
  };
  var getGameData = function getGameData() {
    var firstElement = (0, _utils2.default)(2, 100);
    var commonDiff = (0, _utils2.default)(2, 100);
    var sequence = addNumberToSequence([firstElement], progressionLength, commonDiff);
    var elementIndex = (0, _utils2.default)(0, sequence.length - 1);
    var question = sequence.map(function (digit, index) {
      return index === elementIndex ? '..' : digit;
    }).join(' ');
    var answer = '' + sequence[elementIndex];
    return (0, _hexletPairs.cons)(question, answer);
  };
  (0, _2.default)({
    instruction: 'What number is missing in this progression?',
    getGameData: getGameData
  });
};
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