In Python, there are 2 ways to extract all the numbers contained in a string. Using List Comprehension List comprehensions provide a concise way to create lists. If you only want to extract only positive integers, try the following: #!/usr/bin/...

In Golang, there are 2 ways to pipe several commands. Using piped commands For example, this function retrieves the CPU model name using piped commands: package main import ( "fmt" "os/exec" ) func main() { cmd := "cat /proc/cpuinfo | eg...

In Python, there are 2 ways to check if an object is of a given type. Using isinstance Method The isinstance(object, classinfo) method returns True if the object argument is an instance of the classinfo argument, or of a (direct, indirect, or virtua...

In Python, there are 3 ways to execute a program or call a system command. Using subprocess Module The subprocess module allows you to spawn new processes, connect to their input/output/error pipes, and obtain their return codes. See the following e...

terminate a process. kill is a command that is used in several popular operating systems to send signals to running processes. The command kill sends the specified signal to the specified process or process group. If no signal is specified, the TE...

Print the first 10 lines of each FILE to standard output. head is a program on Unix and Unix-like operating systems used to display the beginning of a text file or piped data. By default, head will print the first 10 lines of its input to the stand...

search for files and directories based on their permissions, type, date, ownership, size, and more. find is a command-line utility that locates files based on some user-specified criteria and either prints the pathname of each matched object or, if ...

command line tool and library for transferring data with URLs. cURL (pronounced 'curl') is a computer software project providing a library (libcurl) and command-line tool (curl) for transferring data using various network protocols. The name ...

Concatenate FILE(s), or standard input, to standard output. The cat command (short for “concatenate”) lists the contents of files to the terminal window. This is faster than opening the file in an editor, and there’s no chance you can accidentally a...

Generates and/or modifies files based on a schematic.Creates a new, generic NgModule definition in the given or default project. NgModule ng generate module page/edit ng g m page/edit CREATE src/app/page/edit/edit.module.ts (19...