3 Oct Literate programming: Knuth is doing it wrong. Literate programming advocates this: Order your code for others to read, not for the compiler. Literate Programming (Lecture Notes) [Donald E. Knuth] on *FREE * shipping on qualifying offers. This anthology of essays from Donald Knuth, the. The book Literate Programming, Donald E. Knuth is published by Center for the Study of Language and Information.

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Literate programming is a methodology that combines a programming language with knuth literate programming documentation language, thereby making programs more robust, more portable, more easily maintained, and arguably more fun to write than programs that are written only in a high-level language. Knuth says that when he realized this, he began to think of a program as a web of various parts.

Instead of comments provided as side notes to source code a literate program contains the explanation of concepts on each level, with lower level concepts deferred knuth literate programming their appropriate place, which allows for better communication of thought.

The literate programming paradigmas conceived by Knuth, knuth literate programming a move away from writing programs in the manner and order imposed by the computer, and instead enables programmers to develop programs in knuth literate programming order demanded by the logic and flow of their thoughts. Literate programming Computer-related introductions in Please send suggested corrections to knuth-bug cs.

Literate programming

But sigh it probably isn’t. KnuthLiterate Programming [1]. The present chunkwhich does the countingwas actually one of the simplest lterate write. I may not be able to read your message until many months have gone by, because I’m working intensively on The Art of Computer Programming.

The main idea is to treat a program as a piece of literature, addressed to human beings rather than to a computer. The grand totals must be initialized to zero at the beginning knuth literate programming the program.

A preprocessor is used to substitute arbitrary hierarchies, or rather “interconnected ‘webs’ of macros”, [4] to produce the compilable source code with one command “tangle”and documentation with another “weave”.

Knuth literate programming, Eric January The following snippet of the wc literate program [10] shows how arbitrary descriptive phrases in a natural language are used in a knuth literate programming program to create macros, which act as new “operators” in the literate programming language, and hide chunks of code or other macros.

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Furthermore, several errors were unfortunately introduced on the cover of the printing: Actually, writing out the expanded source code can be done from any section or subsection i. The articles have been revised, extended, and brought up to date. Literate programming is a programming paradigm introduced by Donald Knuth in which a program is given as an explanation of the program logic in a natural knuth literate programming, such as English, interspersed with snippets of macros and traditional source code, from which a compilable source code can be generated.

Such exposition of ideas creates the flow of thought that is like a literary work.

Literate Programming

The main intention behind this approach was to treat program as a literature understandable to knuth literate programming beings.

In other words, the name of one macro can usefully be a parameter to another macro. In fact, macros knuth literate programming stand for any arbitrary chunk of code or other macros, and are thus more general than top-down or bottom-up “chunking”, or than subsectioning. Literat page was last edited on 26 Julyat And the fact that there’s no need to be hung up on the question of top-down versus bottom-up, since a programmer can now view a large program as a web, to be explored in a psychologically correct order is perhaps the greatest lesson I have learned from my recent experiences.

The same example was later rewritten for the noweb literate liiterate tool. A complex piece of software consists of simple parts and simple relations between those parts; the knuth literate programming task is to state those parts and those relationships, in whatever order is best for human comprehension knuth literate programming in some rigidly determined order like top-down or bottom-up.

Literate programming LP tools are used to obtain two representations from a literate source file: Retrieved from ” https: This book is an anthology of essays including my early papers on related topics such as structured programming, as well as the article in The Computer Journal that launched Literate Programming itself.

According to Knuth, [5] [6] literate programming provides higher-quality programs, since it knuth literate programming programmers to explicitly state the thoughts behind the program, making poorly thought-out design decisions more obvious. Knuth wrote a “novel” which explains the code of the interactive fiction game Colossal Cave Adventure.

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Knuth had knut used a literate programming system called DOC as early as This differs from traditional documentation, in which a programmer knuth literate programming presented with source code that follows a compiler-imposed order, and must decipher the thought process behind the program from the code and its knuth literate programming comments.

Literate programming

But as time went on, I’ve become extremely pleased with the name, because I think that a complex piece of software is, indeed, best regarded as a web that has been delicately pieced knuth literate programming from simple materials. A classic example of literate programming is the literate knuth literate programming literare the standard Unix wc word counting program.

However, it correctly resembles the complicated nature of software delicately pieced together from simple materials. There are various other implementations of the literate programming concept some of them knuth literate programming have macros and hence violate Order of human logic knuth literate programming. Views Read Edit View history. Macros are not the same as “section names” in standard documentation. The program is also knuty as a hypertext document, rather like the World Wide Web.

We understand a complicated system by understanding its simple parts, and by understanding the simple relations between those parts and their ;rogramming neighbors.

Literate programming: Knuth is doing it wrong

Journal of Statistical Software. Literate Programming in WEB”.

From Wikipedia, knuyh knuth literate programming encyclopedia. The preprocessor also provides an ability to write out the content of the macros and to add to already created macros in any place in the text of the literate program source file, thereby disposing of the need to keep in mind the restrictions imposed by traditional programming languages or to interrupt the flow of thought.

For example, suppose that you want to define something like A hierarchical structure is present, knuth literate programming the most important thing about a program is its structural relationships.