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 in WEB”. 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 knuth literate programming than programs programmkng are written only in a high-level language.
These arbitrary explanatory phrases become precise new operators, created on the fly by the programmer, forming a meta-language on top of the underlying programming language.
Journal of Statistical Software. The articles have been revised, extended, and brought up to date. However, because these tools do not implement 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 machine-imposed sequence to one convenient to the human mind, they cannot properly be called literate programming tools in the sense intended by Knuth.
The literate programming paradigmas conceived by Knuth, represents a move away from writing programs in the manner and order imposed by knuth literate programming computer, and instead enables programing to develop programs in the order demanded by the logic and flow of their thoughts.
The documentation for a literate program is produced as part of writing the program.
Literate programming: Knuth is doing it wrong
This approach was implemented at Stanford university as literxte part of knuht on algorithms and digital typography. Knuth literate programming page was last edited on 26 Julyknuth literate programming Schulte, Eric January The same example was later rewritten for the noweb literate programming tool.
The main idea is to treat a program as literaet piece of literature, addressed to human beings rather than to a computer. Furthermore, several errors were unfortunately introduced on the cover of the printing: A hierarchical structure is present, knuth literate programming the most important thing about a program is its structural relationships.
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. Please send suggested corrections to knuth-bug cs. The present chunkwhich does the countingwas actually one of the simplest to write.
These macros are similar to the algorithms in pseudocode typically used knuth literate programming teaching computer science. This book received the Productivity Award from Computer Language magazine,pdogramming to products that significantly increase programmer productivity. This differs from traditional documentation, in which a programmer is presented with source code that follows a compiler-imposed order, and must decipher the thought process behind the program from the code and its associated comments.
Literate programming is writing out the program logic in a human language with included separated by a knuth literate programming markup code snippets and macros. Literate programming Computer-related introductions in Macros in a literate source file are simply title-like or explanatory phrases in a human language that describe human abstractions created while solving the programming problem, and hiding chunks of code knuth literate programming lower-level macros.
Knuth had privately used a literate programming lrogramming called DOC litedate early as The first published knuth literate programming programming environment was WEBintroduced by Donald Knuth knuth literate programming for his TeX typesetting system; it uses Pascal as its underlying programming language and TeX for typesetting of the documentation.
And the fact that there’s no need to be hung knuth literate programming 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.
My original idea was that Litedate would be merely a tool for documentation, but I actually found that my WEB programs were better than the programs I had been writing in other knuth literate programming.
I may not be able to read your message until many months have knuth literate programming by, because I’m working intensively on The Art of Computer Programming. Actually, writing out the expanded source code can be done from any section or subsection i.
The program is also viewed as a hypertext document, proyramming like the World Wide Web. But after gaining experience with WEB, I have literzte to realize that there is no need to choose once and for all between top-down and bottom-up, because a program is best thought of as a web instead of a tree. Retrieved from ” https: We look at each character and change state if it begins or ends a word.
A classic example of literate programming is the literate implementation of the standard Unix wc word counting program. Macros are not the same as “section names” in standard documentation.
Views Read Edit View history. 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 is best for human comprehension not in some rigidly determined order like top-down or bottom-up. The meta-language capabilities of literate programming are knuth literate programming claimed to facilitate thinking, giving a higher “bird’s eye view” of the code and increasing the number of concepts the mind can knuth literate programming retain and process.
Webarchive template wayback knuth literate programming CS1 errors: 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 pfogramming to which you have contributed.
The snippets of the literate wc above show how an explanation of the program and its source code are interwoven.