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20. Node.js Lessons. Data Streams in Node.JS, fs.ReadStream

20. Node.js Lessons. Data Streams in Node.JS, fs.ReadStream

By Ivan Rastvorov 8,290 Oct 25, 2016

Hey all! Our topic for today is Data Streams In Node.js. We will try to learn all the aspects in details for the reason it turns out that on the one hand, common browser JavaScript development lack streams. And on the other hand, knowing and understanding stream principles is necessary for seamless server development because a stream is a versatile way of work with data sources universally used.

#Programming
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19. Node.js Lessons. Safe Way to a FS File and Path

19. Node.js Lessons. Safe Way to a FS File and Path

By Ivan Rastvorov 28,842 Oct 21, 2016

This article will deal with how to create a web server in Node.js, which will return a file to a user from a public directory. You may wonder: why do we need Node.js here? Why can’t we use another server? You question surely does make sense. Yes, for returning files other servers are generally more effective. From the other side, Node.js works pretty well, too. Second, before returning a file it can also perform some intellectual activities: for example, refer to a database, check out whether a user is permitted to access the file and give the file to him, if it’s permitted.

#Programming
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18. Node.js Lessons. Work With Files. Fs Module

18. Node.js Lessons. Work With Files. Fs Module

By Ivan Rastvorov 5,866 Oct 20, 2016

Dear friends! The key goal of our today’s lesson is to learn how to work with binary data and file system. Node.js contains fs module to work with files, which includes a number of functions for various operations with files and directories.

#Programming
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20. Уроки Node.js. Потоки данных в Node.JS, fs.ReadStream

20. Уроки Node.js. Потоки данных в Node.JS, fs.ReadStream

By Pavel Bragin 6,461 Oct 19, 2016

Всем привет! Тема этого занятия: Потоки данных в Node.js. Мы постараемся разобраться в этой теме более подробно, поскольку, с одной стороны, так получается, что потоки в обычной браузерной JavaScript разработке отсутствуют, а с другой стороны, уверенное владение потоками необходимо для грамотной серверной разработки, поскольку поток является универсальным способом работы с источниками данных, которые используются повсеместно.

#Programming
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19. Уроки Node.js. Безопасный Путь к Файлу в fs и path.

19. Уроки Node.js. Безопасный Путь к Файлу в fs и path.

By Pavel Bragin 3,911 Oct 19, 2016

В этой статье мы рассмотрим, как при помощи Node.js создать веб-сервер, который будет возвращать файл пользователю из директории public. Может возникнуть вопрос: зачем здесь Node.js? почему бы не сделать это на другом сервере? Вопрос совершенно уместен. Да, для отдачи файлов, как правило, другие сервера будут более эффективны. С другой стороны, Node.js, во-первых, тоже работает весьма неплохо, а во-вторых, перед отдачей файла может совершить какие-то интеллектуальные действия, например, обратиться к базе данных, проверить, имеет ли пользователь право на доступ к данному файлу, и только если имеет, тогда уже отдавать.

#Programming
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18. Уроки Node.js. Работа с Файлами, Модуль fs

18. Уроки Node.js. Работа с Файлами, Модуль fs

By Pavel Bragin 15,543 Oct 18, 2016

Всем привет! Цель этого занятия – научиться работать с бинарными данными и с файловой системой. В Node.js для работы с файлами существует модуль fs, и в нем есть множество функций для самых различных операций с файлами и директориями.

#Programming
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Why Startups Fail? Part 2

Why Startups Fail? Part 2

By Ivan Rastvorov 4,414 Oct 5, 2016

Let's continue our list! 11. Lose Focus (13%) The basic idea of a startup is almost always changing. Sometimes startups are doing a full project's restart using new ideas. And when you think over the possibility to add some secondary functions, which "would not hurt." That’s where the main and unique idea gets lost among others.

#Startups
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Why Startups Fail? Part 1

Why Startups Fail? Part 1

By Ivan Rastvorov 5,041 Oct 5, 2016

CB Insights interviewed startup founders about why they failed, and sorted these reasons into 20 distinct categories. You’ll notice that the sum of the percentages exceeds 100%, because many startups fail for more than one reason. This is not a complete list of the causes of failure, just those you can control, we hope that you'll find some necessary items that will help you in the future.

#Startups
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14. Node.js Lessons. Script Debugging pt. 2

14. Node.js Lessons. Script Debugging pt. 2

By Ivan Rastvorov 3,993 Oct 4, 2016

Let's continue our debug lesson. Let us learn another essential debugging scenario, in particular – debugging with errors in JavaScript. For example, while handling a request:

#Startups
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14. Node.js Lessons. Script Debugging pt 1.

14. Node.js Lessons. Script Debugging pt 1.

By Pavel Bragin 5,411 Sep 30, 2016

Our next lesson is devoted to Node.JS debugging. First of all, we will explore the simplest built-in debugger that is called by the node debug command. It looks just like that. Imagine, we’ve got the script:

#Programming
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