How Not To Sort By Average Rating
By Evan Miller February 6, 2009 (Changes) Translations: Dutch Estonian German Russian Ukrainian PROBLEM: You are a web programmer. You have users. Your users rate stuff on your site. You want to put the highest-rated stuff at the top and lowest-rated at the bottom. You need some sort of “score” to sort by. WRONG SOLUTION #1: Score = (Positive ratings) − (Negative ratings) Why it is wrong: Supp
Cuckoo Filters
My take on computer science -- algorithms, networking, information theory -- and related items. An upcoming paper appearing at CoNext will be of interest to any Bloom Filter user or aficionado: Cuckoo Filter: Practically Better than Bloom (Bin Fan, David Andersen, Michael Kaminsky, Michael Mitzenmacher) Let me describe a cuckoo filter and some of what's in the paper for you. If you want to avoid
Cuckoo filters and their analysis: 11011110
Do you have a software project in which you need a fast and space-efficient approximate set data structure, like a Bloom filter ? Then probably what you want is actually a cuckoo filter , a plug-in replacement for Bloom filters that is faster, more space-efficient, and more versatile (because it allows elements to be deleted as well as inserted). Michael Mitzenmacher has described cuckoo filters i
corte.si
Update See sortvis.org for many more visualisations! I dislike animated sorting algorithm visualisations - there's too much of an air of hocus-pocus about them. Something impressive and complicated happens on screen, but more often than not the audience is left mystified. I think their creators must also know that they have precious little explanatory value, because the better ones are sexed up wi
LEDBAT - Wikipedia
Low Extra Delay Background Transport (LEDBAT) is a way to transfer data on the Internet quickly without clogging the network.[1] LEDBAT was invented by Stanislav Shalunov[2][3] and is used by Apple for software updates, by BitTorrent for most of its transfers[4] and by Microsoft SCCM software distribution points.[5] At one point in time, LEDBAT was estimated to carry 13–20% of Internet traffic.[4]
d.y.d. 2倍だけじゃない
10:01 10/07/20 それでも２倍だ 先日のvectorの伸長度合いの記事に関して 本当に1.5倍のほうがメモリ効率がよいのか という反応をいただきました。とても興味深い。みんな読みましょう。 自分の理解メモ： 「再利用ができるから嬉しい」等の議論をするなら、 今までに確保したメモリ (1 + r^1 + ... + r^k) のうち、 有効に使えてるメモリ r^{k-1} (バッファ拡大直後) や r^k (次のバッファ拡大直前) の割合で評価してみようじゃないかという。 まず簡単のために再利用をしない場合を考えると、この割合はそれぞれ (r-1)/r^2、 (r-1)/r になります（途中計算略）。 この利用率が最悪になる瞬間 (r-1)/r^2 を最善にしよう、 という一つの指標で考えてみると、式を微分なりなんなりしてみると r = 2 で最大(25%)となることがわかります
Sort Benchmark Home Page
New: We are happy to announce the 2023 winners listed below. The new records are listed in green. Congratulations to the winners! Background Until 2007, the sort benchmarks were primarily defined, sponsored and administered by Jim Gray. Following Jim's disappearance at sea in January 2007, the sort benchmarks have been continued by a committee of past colleagues and sort benchmark winners. The Sor
Deciding if a Point is Inside a Polygon - Pure Python
This is not a particularly tricky problem, but there wasn't a Python solution on the net when I went looking. I've simply adapted some C code I found at this excellent page. # determine if a point is inside a given polygon or not # Polygon is a list of (x,y) pairs. def point_inside_polygon(x,y,poly): n = len(poly) inside =False p1x,p1y = poly[0] for i in range(n+1): p2x,p2y = poly[i % n] if y > mi
สล็อตเว็บตรง คืออะไร? ทำไมต้องเลือกเล่นเว็บตรงเท่านั้น
สล็อตเว็บตรง คืออะไร? ทำไมต้องเลือกเล่นเว็บตรงเท่านั้น หนึ่งในคำที่ผู้เล่นมักพบบ่อยคือ สล็อตเว็บตรง ซึ่งหากคุณยังไม่เข้าใจว่าคืออะไร วันนี้เราจะพาไปทำความรู้จักกับสล็อตเว็บตรงอย่างละเอียด เพื่อให้คุณตัดสินใจได้ถูกต้องและเล่นได้อย่างมั่นใจมากขึ้น ทำความรู้จักไปพร้อมกัน คือเว็บไซต์ที่ให้บริการเกมสล็อตออนไลน์เว็บตรง โดยไม่ผ่านตัวแทนหรือคนกลาง ผู้เล่นสามารถเข้าเล่นเกมได้โดยตรงกับผู้ให้บริการที่ได้รับส
Determining Whether A Point Is Inside A Complex Polygon
Point-In-Polygon Algorithm — Determining Whether A Point Is Inside A Complex Polygon © 1998,2006,2007 Darel Rex Finley. This complete article, unmodified, may be freely distributed for educational purposes. Visit the new page which adds spline curves to this technique! Also visit the shortest-path-through-polygon page! Figure 1 Figure 1 demonstrates a typical case of a severely concave polygon wit
List of Algorithms
A complete list of all major algorithms (300), in any domain. The goal is to provide a ready to run program for each one, or a description of the algorithm. Programming languages include Java, JavaScript and PHP, C, C++ either in direct form or generated from a Scriptol source. Automata Artificial intelligence Computer vision Genetic algorithms Neural networks Machine learning Bioinformatics and c
Big-O Algorithm Complexity Cheat Sheet (Know Thy Complexities!) @ericdrowell
Hi there! This webpage covers the space and time Big-O complexities of common algorithms used in Computer Science. When preparing for technical interviews in the past, I found myself spending hours crawling the internet putting together the best, average, and worst case complexities for search and sorting algorithms so that I wouldn't be stumped when asked about them. Over the last few years, I
Controlling Queue Delay - ACM Queue
May 6, 2012 Volume 10, issue 5 PDF Controlling Queue Delay A modern AQM is just one piece of the solution to bufferbloat. Kathleen Nichols, Pollere Inc. Van Jacobson, PARC Nearly three decades after it was first diagnosed, the “persistently full buffer problem,” recently exposed as part of bufferbloat,6,7 is still with us and made increasingly critical by two trends. First, cheap memory and a “mor
The CoDel queue management algorithm
"Bufferbloat" can be thought of as the buffering of too many packets in flight between two network end points, resulting in excessive delays and confusion of TCP's flow control algorithms. It may seem like a simple problem, but the simple solution—make buffers smaller—turns out not to work. A true solution to bufferbloat requires a deeper understanding of what is going on, combined with improved s
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Cuckoo Filter: Simplification and Analysis
Algorithm Visualizer
scrypt.dvi
GitHub - nryoung/algorithms: This repository is not maintained
C Algorithms
Official Google Research Blog: Extra, Extra - Read All About It: Nearly All Binary Searches and Mergesorts are Broken
