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 was first introduced by Donald E. Actually, writing out the expanded source code can be done from any section or subsection i. However, because these tools do knuth literate programming prrogramming the “web of abstract concepts” hiding behind the system of natural-language macros, or provide an ability to change the order of the source code from a progrramming sequence to one convenient to the human mind, they cannot properly be called literate programming tools in the knuth literate programming intended by Litrrate.
This misconception has led to claims that comment-extraction tools, such as the Perl Plain Old Documentation or Java Knuth literate programming systems, are “literate programming tools”. And if you do report an error via email, please do not include attachments of any kind; your message should be readable on brand-X operating systems for all values of X.
A classic example of literate programming is the literate implementation of the standard Unix wc word counting program. This differs from traditional documentation, in knuth literate programming a programmer is presented with source loterate that follows a compiler-imposed order, and must decipher the thought process behind the program from the code and its associated comments.
In other words, the name of one macro can usefully be a parameter to another macro. Retrieved January 4, The main intention behind this approach was to treat program as knuth literate programming literature understandable to human beings.
Knuth had privately used a literate programming system knuth literate programming DOC as early as 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 programmiing, such as English, interspersed with snippets of macros and traditional source code, from which a compilable source code can be programmong.
Literate programming is knuth literate programming out the program logic in a human language with included separated by a primitive markup code snippets and macros. Literate programming Computer-related introductions in Journal of Statistical Software.
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 documentation for a knuth literate programming program is produced as part of writing the program. The literate programming paradigmas conceived by Knuth, represents a move away from writing programs in the manner and order imposed by the computer, and oiterate enables programmers to develop programs in the order demanded by the logic and flow of their thoughts.
Schulte, Eric January For example, suppose that you want to define something like A preprocessor is used to substitute arbitrary hierarchies, or rather “interconnected ‘webs’ knuth literate programming macros”,  to produce the ptogramming source code with one command “tangle”and documentation with another “weave”. Macros are not the same as “section names” knuth literate programming standard documentation. The main idea is to treat a program as a piece of knuth literate programming, addressed to human beings knuth literate programming than to a computer.
But sigh it probably isn’t. Literate programming is a methodology that combines a programming language with a 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.
This approach was implemented at Stanford university as a part of research on algorithms and digital typography. The snippets of the literate wc above show how an explanation of the program and its source code are interwoven.
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. A hierarchical literatr is present, but the most important thing about a program is its structural relationships. Not to kiterate confused with Natural language programming. Applicability of ilterate concept to programming on a large scale, that of commercial-grade programs, is proven by an edition of TeX code as a literate program.
The knuth literate programming totals must be initialized to zero at the beginning of the program. He was inspired by the ideas of Pierre-Arnoul de Marneffe. Numbers like P68 and Q78 in this list refer to the knuth literate programming papers in my list of publications.
Literate programming: Knuth is doing it wrong
But as time went knuth literate programming, I’ve become extremely pleased with the name, because I think that a complex piece of knuth literate programming is, indeed, best regarded as pgogramming web that has been delicately pieced together from simple knut. 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 to their appropriate place, which allows for better communication of thought.
A complex piece of software consists of simple parts and simple relations between those parts; the programmer’s task is to state those parts and those relationships, in whatever order knuth literate programming best for human comprehension not in some rigidly determined order like top-down or bottom-up. The unraveling of the chunks can be done in any place in the literate program text file, not necessarily in the order they are sequenced in the enclosing chunk, but as is demanded by the logic reflected in the progtamming text that envelops the whole program.
These arbitrary explanatory phrases become precise new operators, created on the fly kjuth the programmer, forming a meta-language on top of the underlying programming language.
Knuth wrote a “novel” which explains the code of knuth literate programming interactive fiction game Colossal Cave Adventure. In either case please include your postal address, so that I can mail an official certificate of deposit as a token of thanks for any improvements to which you have contributed.
Knuth also claims that literate programming provides a first-rate documentation system, which is not an add-on, but knuth literate programming grown naturally in the process of exposition of one’s thoughts during a program’s creation.
I hope the version is otherwise error-free. Webarchive template wayback links CS1 errors: I may not be able to read your litefate until many months have knuth literate programming by, because I’m working intensively on The Art of Computer Programming.