Tasks for interview of programmer(Javascript)

interview

// 1. You need to implement function that return array of powers for the number (10min)

const getPowersOfNumber = (number, until) => {
  return 'not implemented';
};

// test
const answer = [1, 3, 9, 27];

console.log(
  `${JSON.stringify(answer)}` === `${JSON.stringify(getPowersOfNumber(3,3))}`
);

// 2. You need to implement function that return aggregate of collections (15min + refactoring 5min)

const getAggregateCollection = (firstCollection, secondCollection) => {
  return 'not implemented';
};

// test
const firstCollection = [
  {
    id: 'h1',
    value1: '123',
  },
  {
    id: 'h2',
    value1: '234',
  },
  {
    id: 'h3',
    value1: '456',
    value2: '43',
    value3: '12',
  }
];
const secondCollection = [
  {
    id: 'h1',
    value1: '678',
  },
  {
    id: 'h2',
    value1: '234',
    value2: '123',
  },
  {
    id: 'h3',
    value1: '56',
  },
  {
    id: 'h4',
    value4: '890',
  },
];
const answer = [
  {
    id: 'h1',
    value1: '678',
  },
  {
    id: 'h2',
    value1: '234',
    value2: '123',
  },
  {
    id: 'h3',
    value1: '56',
    value2: '43',
    value3: '12',
  },
  {
    id: 'h4',
    value4: '890',
  },
];

console.log(
  `${JSON.stringify(answer)}` === `${JSON.stringify(getAggregateCollection(firstCollection, secondCollection))}`
);

// 3. You need to implement function that return diff of collections (20min + refactoring 5min)

const getDiffOfCollections = (firstCollection, secondCollection) => {
  return 'not implemented';
};

// test
const firstCollection = [
  {
    id: 'h1',
    value1: '123',
  },
  {
    id: 'h2',
    value1: '234',
  },
  {
    id: 'h3',
    value1: '456',
    value2: '43',
    value3: '12',
  }
];
const secondCollection = [
  {
    id: 'h1',
    value1: '678',
  },
  {
    id: 'h2',
    value1: '234',
    value2: '123',
  },
  {
    id: 'h3',
    value1: '56',
    value3: '567',
  },
  {
    id: 'h4',
    value4: '890',
  },
];
const answer = {
  h1: {
    value1: ['123', '678'],
  },
  h3: {
    value1: ['456', '56'],
    value3: ['12', '567'],
  },
};

console.log(
  `${JSON.stringify(answer)}` === `${JSON.stringify(getDiffOfCollections(firstCollection, secondCollection))}`
);