![]() ![]() When one adopts the Unix philosophy, she/he can compose programs as sequences of executions of programs. Given a set of inputs, it calculates and returns the output. Instead of thinking in programs with multiple features, one can think in program as if it was a subroutine - or an algorithm with a single purpose. The principle of restricting a program to perform a single task efficiently is a powerful one. Write programs to handle text streams, because that is a universal interface."įrom the Portuguese entry, "or, to put it simply, do only one thing and do it well". "Write programs that do one thing and do it well. The following paragraph cites the Wikipedia citation: When one works with the command line, she/he may find worth to know about the Unix philosophy. Programs that are operated using a command line are normally referred as having a command-line interface or CLI. Programs with textual interface have a similar acronym: TUI, meaning text-based user interface. Programs with graphical interface are often referred by the acronym GUI, which means graphical user interface. Henceforth, you will be able to integrate your programs to the efficient command line, once they start receiving values as input from a command line interpreter (shell). The command line is, therefore, still a modern resource for automation. The possibility of storing sequences of commands as macros or in a script allows repeating solutions using multiple programs as if they were subroutines in a programming language. In particular, the command line allows noticing how the operation of graphical interfaces are limited (and inefficient). The efforts required to learn it will be rewarded over time. Instead of fearing or running from the command line, it is worth embracing it as a programming tool. In 2022, the command is still effective and efficient to perform common programming tasks.Īutomation, data exchange, data conversion, and server operations are some examples.Įven in personal projects, the command line is required to use package managers (as the ones presented in Libraries) and source-control management systems. Old School Automation for the Futureįor many people, the command line is an archaic magical artifact an inheritance of the dawning of Computation. In many languages, it suffices to follow the models from the experimentation section to modify syntax, commands and functions from the code blocks.Ĭ and C++ are exceptions, for they require pointers access the memory. ![]() If you want to use another language, the introduction provides links for configure development environments for the C, C++, Java, LISP, Prolog, and SQL (with SQLite) languages. The following example assumes that you know how to run code in your chosen language, as presented in the configuration pages. Thus, if you have an Integrated Development Environment (IDE), or a combination of text editor and an interpreter, you are ready to start. If you need to configure one, you can refer to the following resources. Thus, sooner or later, you will need to set up a development environment. ![]() However, they do not provide all features offered by interpreters for the languages. If you wish to try programming without configuring an environment, you can use of the online editors that I have created: Later, I have commented about GDScript as an option for people who want to program digital games or simulations.įor the introductory programming activities, you will need, at least, a development environment configured for one of the previous languages. This is what I have: while getopts ":n:h" opt doĮcho "script " >&2Įcho "Option -$OPTARG requires an argument.In the introduction to development environments, I have mentioned Python, Lua and JavaScript as good choices of programming languages for beginners. The problem I am having is figuring out how to set this up so that if no options or arguments are supplied, for it to run a separate set of commands. From research I have found that getopts is the best way to do this, and so far it has been simple to figure out and setup. So I am writing a script that mixes options with arguments with options that don't. ![]()
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