Скачать или смотреть Building multi-threaded applications with NodeJS child_process module

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In this video, we will learn how to use the child_process module in Node.js. This module allows us to spawn child processes, which are new processes that run alongside the parent process. We can use child processes to run system commands, execute JavaScript code, and communicate with each other.

The first part of the video shows how to use the exec and execFile methods to run system commands. These methods take a command as an argument and return the output of the command as a string. The execFile method is generally considered to be safer than the exec method because it doesn't create a shell.

The next part of the video shows how to use the spawn method to create a child process that executes JavaScript code. The spawn method takes a command as an argument and returns a child process object. We can use this object to listen for events from the child process, such as the data event, which is emitted when the child process writes data to its standard output stream.

The final part of the video shows how to use the fork method to create a child process that is a copy of the parent process. The fork method takes a path to a file as an argument and returns a child process object. We can use this object to send messages to the child process and receive messages from the child process.

In this video, we learned how to use the child_process module to spawn child processes, run system commands, execute JavaScript code, and communicate with child processes. These techniques can be used to build a variety of applications in Node.js.

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The child_process module is a powerful tool that can be used to do a variety of things, such as running system commands, executing JavaScript code, and communicating with child processes.

The exec and execFile methods are the simplest way to run system commands. However, they are not as safe as the spawn method because they create a shell.

The spawn method is a more flexible way to run system commands. It allows us to pass arguments to the command, capture thel output of the command, and listen for events from the child process.

The fork method is used to create a child process that is a copy of the parent process. This can be useful for communicating between parent and child processes.

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