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  2. Command-line argument parsing - Wikipedia

    en.wikipedia.org/wiki/Command-line_argument_parsing

    Node.js programs are invoked by running the interpreter node interpreter with a given file, so the first two arguments will be node and the name of the JavaScript source file. It is often useful to extract the rest of the arguments by slicing a sub-array from process.argv .

  3. Shebang (Unix) - Wikipedia

    en.wikipedia.org/wiki/Shebang_(Unix)

    The loader executes the specified interpreter program, passing to it as an argument the path that was initially used when attempting to run the script, so that the program may use the file as input data. [8] For example, if a script is named with the path path/to/script, and it starts with the line #! /bin/sh, then the program loader is ...

  4. Here document - Wikipedia

    en.wikipedia.org/wiki/Here_document

    In computing, a here document (here-document, here-text, heredoc, hereis, here-string or here-script) is a file literal or input stream literal: it is a section of a source code file that is treated as if it were a separate file.

  5. xargs - Wikipedia

    en.wikipedia.org/wiki/Xargs

    One might be dealing with commands that can only accept one or maybe two arguments at a time. For example, the diff command operates on two files at a time. The -n option to xargs specifies how many arguments at a time to supply to the given command. The command will be invoked repeatedly until all input is exhausted.

  6. Unix shell - Wikipedia

    en.wikipedia.org/wiki/Unix_shell

    A Unix shell is a command-line interpreter or shell that provides a command line user interface for Unix-like operating systems. The shell is both an interactive command language and a scripting language , and is used by the operating system to control the execution of the system using shell scripts .

  7. Command pattern - Wikipedia

    en.wikipedia.org/wiki/Command_pattern

    On the other hand, if the code is defined by the command object itself, the target object will be a different object entirely. Command Object, routed event arguments, event object: the object that is passed from the source to the Command/Action object, to the Target object to the code that does the work. Each button click or shortcut key ...

  8. Usage message - Wikipedia

    en.wikipedia.org/wiki/Usage_message

    In computer programming, a usage message or help message is a brief message displayed by a program that utilizes a command-line interface for execution. This message usually consists of the correct command line usage for the program and includes a list of the correct command-line arguments or options acceptable to said program.

  9. Shell script - Wikipedia

    en.wikipedia.org/wiki/Shell_script

    A shell script is a computer program designed to be run by a Unix shell, a command-line interpreter. [1] The various dialects of shell scripts are considered to be command languages . Typical operations performed by shell scripts include file manipulation, program execution, and printing text.