![]() ![]() The simplest way of retrieving arguments in Node.js is via the process.argv array. ![]() In this section we'll show you how to use arguments via the built-in way ( process.argv), as well as with the popular packages minimist and yargs. By default Node will handle accepting the arguments for you, but there are also some great third party packages that add some very useful features. Like many other languages, Node.js applications also accept command line arguments. Passing Command Line Arguments in Node.js Command line applications can be difficult to use unless you're using a desktop or laptop computer, so they're not typically used on smaller devices like phones or tablets.The biggest disadvantage of passing information via the command line is that interface has steep learning curve, so it's difficult for most people to use unless they have a good deal of experience using CLI tools.Command line arguments are used in conjunction with scripts and batch files, which is particularly useful for automated testing.Īnd here are some of the disadvantages of using them:.You can pass unlimited number of arguments via the command line.String data types can easily be converted to other data types within an application, making the arguments very flexible. Command line arguments are passed as strings to your program.This is particularly useful if you want to perform large number configuration settings. You can pass information to an application before it starts.The following are some of the major benefits of using command line arguments: ![]() Also, depending on the program, you can pass arguments in the form of key-value pairs, which we'll see later in this article. The arguments are usually separated by a space - however there are some runtimes that use commas to distinguish between multiple command line arguments. Here runtime can be anything that executes a program/script e.g. An example of the syntax of command line arguments looks like this: $ In most cases the arguments are passed after the program name in your prompt. #53 /var/Command line arguments typically include information used to set configuration or property values for an application. #52 /var/www/html/vendor/laravel/framework/src/Illuminate/Foundation/Http/Kernel.php(111): Illuminate\Foundation\Http\Kernel->sendRequestThroughRouter() #51 /var/www/html/vendor/laravel/framework/src/Illuminate/Foundation/Http/Kernel.php(142): Illuminate\Pipeline\Pipeline->then() #4 /var/www/html/vendor/laravel/framework/src/Illuminate/Database/Query/Builder.php(2907): Illuminate\Database\Query\Builder->Illuminate\Database\Query\() #3 /var/www/html/vendor/laravel/framework/src/Illuminate/Database/Query/Builder.php(2373): Illuminate\Database\Query\Builder->runSelect() #2 /var/www/html/vendor/laravel/framework/src/Illuminate/Database/Query/Builder.php(2385): Illuminate\Database\Connection->select() #1 /var/www/html/vendor/laravel/framework/src/Illuminate/Database/Connection.php(376): Illuminate\Database\Connection->run() #0 /var/www/html/vendor/laravel/framework/src/Illuminate/Database/Connection.php(672): Illuminate\Database\Connection->runQuer圜allback() ? SQLSTATE: Base table or view not found: 1146 Table 'tutorial_new.blogs' doesn't exist (SQL: select * from `blogs` where (`post_name` = node-js-parsing-arguments) limit 1) Illuminate\Database\QueryException: SQLSTATE: Base table or view not found: 1146 Table 'tutorial_new.blogs' doesn't exist (SQL: select * from `blogs` where (`post_name` = node-js-parsing-arguments) limit 1) in file /var/www/html/vendor/laravel/framework/src/Illuminate/Database/Connection.php on line 712
0 Comments
Leave a Reply. |