Search results
Results from the WOW.Com Content Network
In computing, command substitution is a facility that allows a command to be run and its output to be pasted back on the command line as arguments to another command. Command substitution first appeared in the Bourne shell , [ 1 ] introduced with Version 7 Unix in 1979, and has remained a characteristic of all later Unix shells .
Python uses the + operator for string concatenation. Python uses the * operator for duplicating a string a specified number of times. The @ infix operator is intended to be used by libraries such as NumPy for matrix multiplication. [104] [105] The syntax :=, called the "walrus operator", was introduced in Python 3.8. It assigns values to ...
A string homomorphism (often referred to simply as a homomorphism in formal language theory) is a string substitution such that each character is replaced by a single string. That is, f ( a ) = s {\displaystyle f(a)=s} , where s {\displaystyle s} is a string, for each character a {\displaystyle a} .
The replace command first appeared in MS-DOS 3.2 [2] and has been included in most versions of MS-DOS and compatibles such as FreeDOS [3] and PTS-DOS. [4] DR DOS 6.0 includes an implementation of the replace command. [5] The FreeDOS version was developed by Rene Ableidinger and is licensed under the GPL. [6]
The user types in expressions at the command line, or directs the IDE to transmit them to the Lisp system. Lisp reads the entered expressions, evaluates them, and prints the result. For this reason, the Lisp command line is called a read–eval–print loop . The basic operation of the REPL is as follows.
If n is 1, clear from cursor to beginning of the line. If n is 2, clear entire line. Cursor position does not change. CSI n S SU: Scroll Up Scroll whole page up by n (default 1) lines. New lines are added at the bottom. (not ANSI.SYS) CSI n T SD: Scroll Down Scroll whole page down by n (default 1) lines. New lines are added at the top.
In computer software, strings is a program in Unix, Plan 9, Inferno, and Unix-like operating systems that finds and prints the strings of printable characters in files. The files can be of regular text files or binary files such as executables.
PowerShell is a task automation and configuration management program from Microsoft, consisting of a command-line shell and the associated scripting language.Initially a Windows component only, known as Windows PowerShell, it was made open-source and cross-platform on August 18, 2016, with the introduction of PowerShell Core. [9]