donald knuth

-fold increase in some cases. As for other tasks, it may not be that useful. Remember this before you frantically rewrite the Python code with Cython: "We should forget the small efficiency, the premature optimization is the root of all evils, there are 97% of cases." "--donald Knuth In other words, write the program in Python and see if it meets your needs. In most cases, its performance is good enough .

framework has overcome many of the unique limitations of predecessors, no longer need you to spend time developing complex hack programs. These insights are not something that new people can have. Misconception 3 Older programmers are not as flexible as the brains of young programmers Age growth does affect people's brainpower, and older workers do have a slower response than younger ones. But thinking agile is just one aspect of our comparison. It's not always good to think fast. There is an o

VI and Emacs are respectively called editors of God and God Editor. VI Entry proficiency is very difficult, Emacs easy to get started, proficient, VI used to constantly switch mode, and Emacs is constantly ctrl,meta and other key combinations. So the Gartner Master says that manipulating Emacs is like playing the organ. VI is a pattern, so he rarely uses the combination of keys, editing is really efficient, and I am tired of non-stop mode switching. Emacs was selected. Coincidentally, in fore

fulfill the customer's requirements. Young programmers do not experience so many of these situations, so they rarely have the action to rebel against the manager's wrong decision. Managers cannot use their naïve ideas to ask for things. If you want to have a good team that produces good products, allowing people to pull you back from the wrong path will save your project again and again. Of course, this is only true if you have the courage to admit your ignorance. As for the disappearance of

it may be enhanced later (see Resources for Vyper, and its source code.) ）。 I asked Vyper's founder John Max Skaller about the motives for building the Vyper. Skaller: There are two reasons to build Vyper: First, I like Python, especially its simplicity. But I don't like it. Lack of scope certainty, everything needs to make a lot of changes to make progress. So I decided to correct these problems by building a much higher programming language and building some of the concepts of functional pro

Troubleshoot LaTeX formatting challenges, previewing on selected platforms during authoring TeX, published in 1978, is a markup language that Donald Knuth created in order to use it to format its Art of the Computer Programming series books. Tex is soon widely used in science and academia, but direct use of the Tex tag can be tricky. The LaTeX macro language, which was created by computer scientist Leslie

includes the number of d–1 plus the number of neighbors D and the 1 key values in the parent node of both, a total of d–1 + D + 1 = 2d of the number of nodes.Depth (Depth) describes the number of layers (levels) in the tree. The B-Tree maintains the balance of the tree by requiring all leaf nodes to remain at the same depth. Depth usually grows slowly as the key value is added continuously.Definition of B-treeSome of the terms in the B-tree definition are often confusing, such as the definition

In the implementation of SQLite, a file can contain one or multiple independent btrees. Each BTree is identified by its root page index. The keys and data of all entries constitute valid In the implementation of SQLite, a file can contain one or multiple independent btrees. Each BTree is identified by its root page index. The keys and data of all entries constitute valid SQLite is organized by B-Tree in external databases. For details about B-tree, refer****

engineering management personnel. It is best to have object-oriented experience. Although this book is a non-technical book, it will bring you a lot of feeling and practical value. 8. the art of computer programming is written by Donald Ervin knuth. The author won the 1974 Turing Award for three books in the United States, he is one of the top 12 academic monographs in the world. This book combines a large

people (numbered 1 ~ N). Report the number starting from 1, report to 2, and report the number from 1. Calculate the number of the winner. Complexity after mathematical solution optimization: O (log n)For details, refer to the discussion in the related section of "Specific mathematics" by Donald E. knuth. (Click here)At this time, there is a simpler recursive formula:J (1) = 1;J (2n) = 2j (n) −1, when n is

Premature optimization is the source of all evil. Premature optimization is the root of all edevils!-Donald knuth Walking in the water is the same as developing software with a requirement specification, that is, if water or demand cannot be frozen, it will become easy to walk and develop software. Walking onWater and developing software from a specification are easy if both areFrozen-Edward V berard Hofsta

Convention: cs = computer science (department ). In general, the first 20 cs can be divided into three waves: One or four of the best CS program: Stanford, UC. Berkeley, MIT, CMU 2. The first 10 of the six others: uiuc, Cornell, U. of Washington, Princeton, U.Texas-Austin and U. of Wisconsin-Madison, among which uiuc, Cornell, U.Washington and UW-Madison almost never made the top 10. 3. Other excellent Cs: Caltech, U. of Maryland at CP, ulinoleic, brown, Harvard, Yale, git, Purdue, rice, and U.

temptation at this stage. Keep in mind what Donald knuth has said (a little bitJoke): "immature optimization is the root cause of all troubles ". Although optimization is a key factor in some projectsAll optimizations were blind before they were feasible. View all the problems before the final build of the system. Each project has someYou should first focus on this field and create a test program or protot

numbers with different running resultsPublic class randomtest {Public static void main (string [] ARGs ){Java. util. Random r = new java. util. Random ();For (INT I = 0; I System. Out. println (R. nextint ());}}Seed:In this way, no matter how many times the program runs, the returned results are the same.Public static void main (string [] ARGs ){Java. util. Random r = new java. util. Random (10 );For (INT I = 0; I System. Out. println (R. nextint ());}}The difference between the two methods is

The original post address is in stackoverflow.com List of free programming books (Compiled ): How to design programs: An Introduction to computing and Programming 25 free computer science eBooks Free tech Books Mindview Inc (list of free books) Wikibooks: Programming Cheat sheets (free) Codeplex list of free e-books Book training-on video! Sofware program managers network-free eBooks Ebook share @ linw..info Freebooksclub. net Theassayer.org (free onlin

Internet, because it is likely to be intercepted during this process. Don't complain. This is the most basic security requirement. This also means that it is not recognized to send data in plain text, and also does not eliminate our own encryption methods and obfuscation targets. It is difficult to write a secure encryption system-you can see the WEP situation-so we may wish to use a verified standard encryption library.7. Premature code optimization Donald