simple.util.Console¶
The Console module consists functions and constants to interact with the standard streams. The stream in this modules are:
- stdin The standard input stream stdin is used to accept input from the command line when working in a system environment. In web context such as CGI the stdin holds all the content from POST, PUTS Methods with the exception of GET which is appended to the URL
- stdout The standard output stream stdout is used to display data in the console and act as the document body of a webpage in a web environment.
- stderr The standard output stream stderr is used to display error data in the console. Data written to the stderr can be redirected to the same display as final stdout.
| copyright: | 2018-2019, Azeez Adewale |
|---|---|
| license: | MIT License Copyright (c) 2018 simple |
| author: | Azeez Adewale <azeezadewale98@gmail.com> |
| date: | 5 Febuary 2017 |
| time: | 09 : 29 PM |
| filename: | Console.sim |
Table Of Content¶
| Fields/Blocks/Classes | Summary |
|---|---|
| Called Modules | import simple.util.ConsoleColor which hold all the type of color for the foreground and backgroundof the console. |
| module simple.util | |
| final ConsoleColor | initialized the ConsoleColor variable to enable usage of it Color Fields e.g ConsoleColor.Black |
| final stdout | The standard output stream is the default destination of output for console programs. It is usually directed by default to the text console (generally, on the screen) which can be the terminal. |
| final stderr | The standard error stream is the default destination for error messages and other diagnostic warnings. Like final stdout , it is usually also directed by default to the text console (generally, on the screen). |
| final stdin | The standard input stream is the default source of data for applications. It is usually directed by default to the keyboard. |
| block clearConsole() | Clear the console or terminal that the input output data is currently interacting with. This block is equivalent to using the system function to clear the console, with the platform specific command. |
Called Modules¶
Source: Called Modules Source.
import simple.util.ConsoleColor which hold all the type of color for the foreground and background of the console.
module simple.util¶
Source: module simple.util Source.
final ConsoleColor¶
Source: final ConsoleColor Source.
initialized the ConsoleColor variable to enable usage of it Color Fields e.g ConsoleColor.Black
final stdout¶
Source: final stdout Source.
The standard output stream is the default destination of output for console programs. It is usually directed by default to the text console (generally, on the screen) which can be the terminal.
Although it is commonly assumed that the default destination for stdout is going to be the screen, this may not be the case even in regular console systems, since stdout can generally be redirected on most operating systems at the time of invoking the application. For example, many systems, among them DOS/Windows and most UNIX shells, support the following command syntax :
theprogram > output.txtto redirect the output of theprogram to the file output.txt instead of the console.
Note
The stdout stream cannot be closed in order to prevent error while trying to write to it later, instead of closing the stream the stdout stream will be flushed instead
final stderr¶
Source: final stderr Source.
The standard error stream is the default destination for error messages and other diagnostic warnings. Like final stdout , it is usually also directed by default to the text console (generally, on the screen).
Although in many cases both final stdout and stderr are associated with the same output device (like the console), applications may differentiate between what is sent to final stdout and what to stderr for the case that one of them is redirected. For example, it is frequent to redirect the regular output of a console program (final stdout) to a file while expecting the error messages to keep appearing in the console.
Note
The stderr stream cannot be closed in order to prevent error while trying to write to it later, instead of closing the stream the stderr stream will be flushed instead
final stdin¶
Source: final stdin Source.
The standard input stream is the default source of data for applications. It is usually directed by default to the keyboard.
it is commonly assumed that the source of data for stdin is going to be a keyboard, this may not be the case even in regular console systems, since stdin can generally be redirected on most operating systems at the time of invoking the application. For example, many systems, among them DOS/Windows and most UNIX shells, support the following command syntax :
theprogram < output.txtto use the content of the file output.txt as the primary source of data for theprogram instead of the console keyboard.
Note
The stdin stream cannot be closed
block clearConsole()¶
Source: block clearConsole() Source.
Clear the console or terminal that the input output data is currently interacting with. This block is equivalent to using the system function to clear the console, with the platform specific command. The following command are issued base on the platform
- Windows system(“cls”)
- Others system(“clear”)
This is proven to work in a command line environment but should be avoided in a GUI application as a console or terminal might pop up to execute the system command.
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