grokking-algorithms-js's Introduction

Грокаем Алгоритмы

О коде

Реализация примеров и задач из книги Грокаем Алгоритмы на Javascript

О книге

Алгоритмы — это всего лишь пошаговые алгоритмы решения задач, и большинство таких задач уже были кем-то решены, протестированы и проверены. Можно, конечно, погрузиться в глубокую философию гениального Кнута, изучить многостраничные фолианты с доказательствами и обоснованиями, но хотите ли вы тратить на это свое время?

Откройте великолепно иллюстрированную книгу, и вы сразу поймете, что алгоритмы — это просто. А грокать алгоритмы — это веселое и увлекательное занятие.

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grokking-algorithms-js's Issues

Chapter 3, task 2. It is necessary to count a list, not an array.

Hello!

In chapter 3 of the book, in problem number 2, which sounds like "Напишите рекурсивную функцию для подсчета
элементов в списке", you need to count the number of elements in the list, not in the array.

It is possible that such lists are not often used in JavaScript, but at the same time they are used constantly when building a data tree.

Problem in "grokking-algorithms-js/03_recursion/src/count.js"

Before:

const count = (list) => {
    if (list.length === 0) {
        return 0;
    }
    list.shift();
    return 1 + count(list);
}

export default count;

Solution:

const count = (list) => {
  if (!list.next) return 0;
  return 1 + count(list.next);
}

Example:

const list = {
  next: {
      next: {
          next: {
          },
      },
  },
};
console.log(count(list)); // return 3

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