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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 .
In most of today's popular programming languages and operating systems, a computer program usually only has a single entry point.. In C, C++, D, Zig, Rust and Kotlin programs this is a function named main; in Java it is a static method named main (although the class must be specified at the invocation time), and in C# it is a static method named Main.
[24] [25] Other languages, such as Python, expose operating system specific API (functionality) through sys module, and in particular sys.argv for command-line arguments. In Unix-like operating systems , a single hyphen used in place of a file name is a special value specifying that a program should handle data coming from the standard input or ...
A screenshot of the original 1971 Unix reference page for glob – the owner is dmr, short for Dennis Ritchie.. glob() (/ ɡ l ɒ b /) is a libc function for globbing, which is the archetypal use of pattern matching against the names in a filesystem directory such that a name pattern is expanded into a list of names matching that pattern.
env is a shell command for Unix and Unix-like operating systems.It is used to either print a list of environment variables or run another utility in an altered environment without having to modify the currently existing environment.
The command SET (with no arguments) displays all environment variables and their values. In Windows NT and later set can also be used to print all variables whose name begins with a given prefix by giving the prefix as the sole argument to the command. In Windows PowerShell, the user may type any of the following:
In object-oriented programming, the command pattern is a behavioral design pattern in which an object is used to encapsulate all information needed to perform an action or trigger an event at a later time. This information includes the method name, the object that owns the method and values for the method parameters.
The following commands are equivalent. They list files in the directory /bin. The program is ls, having three flags (l, t, r), and the argument is the directory /bin: ls -l -t -r /bin ls -ltr /bin The following command displays the contents of the files ch1.txt and ch2.txt. The program name is cat, having two file name arguments: cat ch1.txt ...