[JavaSpecialists 230] - String Substring
230String SubstringAuthor: Dr. Heinz M. KabutzDate: 2015-06-30Java Version: 8Category: Tips and Tricks Abstract: Java 7 quietly changed the structure of String. Instead of an offset and a count, the String now only contained a char[]. This had some harmful effects for those expecting substring() would always share the underlying char[]. Welcome to the 230th edition of The Java(tm) Specialists' New
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Index of / NameLast modifiedSizeDescription LICENSE.txt2016-04-27 23:56 11K README.md2016-04-27 23:56 7.9K bower.json2016-04-27 23:56 424 demo-inlined.html2016-04-27 23:56 12K demo-two-column-inlined.html2016-04-27 23:56 14K demo-two-column.html2016-04-27 23:56 5.5K demo.html2016-04-27 23:56 2.9K src/2017-01-13 14:11 - tools/2017-01-13 14:12 - Apache/2.4.29 (Ubuntu) Server at imgur.kosiru.com Port
Patterns for Research in Machine Learning | Ali Eslami
18 Jul 2012 Here I list a handful of code patterns that I wish I was more aware of when I started my PhD. Each on its own may seem pointless, but collectively they go a long way towards making the typical research workflow more efficient. And an efficient workflow makes it just that little bit easier to ask the research questions that matter. My guess is that these patterns will not only be useful
FTL: WebKit’s LLVM based JIT
Over the past year, the WebKit project made tremendous progress on the ability to optimize JavaScript applications. A major part of that effort was the introduction of the Fourth Tier LLVM (FTL) JIT. The Fourth Tier JIT targets long-running JavaScript content and performs a level of optimization beyond WebKit's interpreter, baseline JIT, and high-level optimizing JIT. See the FTL Optimization Stra
Learn SQL the Hard Way
Learn the SQL basics fast. Learn SQL The Hard Way is a crash course in the basics of SQL to store, structure, and analyze data. With this book you can understand what is going on in your database, whether you use an ORM or direct access. It covers all the introductory commands and includes videos demonstrating every exercise. If you need to learn SQL quick, this is the book for you. Get the course
Erlang · How I Start.
Intro Erlang releases are a bit like magnets. Everyone who thinks about them shares the same thought: f**king releases, how do they work? Fortunately, since the years of Emakefiles, reltool and systools, the Erlang community has stood up and improved its tooling continuously. Rebar has been improving non-stop and keeps getting better for many functions. The newest generation, Rebar3, tries to prov
Ergonomics of the Symbolics Lisp Machine
Context: the article describes a historical system initially designed starting in 1973 at the MIT AI Lab (Massachusetts Institute of Technology Artificial Intelligence Laboratory) for AI software development with LISP. The specific hardware / software combination described here was further developed and sold by Symbolics, Inc. starting in 1981/82 until 1993. The specific user interface (Dynamic Wi
Practical Machine Learning Problems - MachineLearningMastery.com
What is Machine Learning? We can read authoritative definitions of machine learning, but really, machine learning is defined by the problem being solved. Therefore the best way to understand machine learning is to look at some example problems. In this post we will first look at some well known and understood examples of machine learning problems in the real world. We will then look at a taxonomy
16500- & 16700-series Platform/Module Compatibility
The page you are looking for is no longer available. Because we continually update our website, pages are often moved or replaced. Let us help you find the content you want. Check your country — use the globe icon above. Search — use the search icon, top right. Link — use any of the navigation links above. Go to the Keysight home page. Still didn't find what you need? Request assistance through Si
ssコマンドはバグと地雷の塊なのでnetstatの代わりにならない - ろば電子が詰まつてゐる
既に有名な話ですが、CentOS 7およびRed Hat Enterprise Linux 7からはifconfigコマンドやnetstatコマンドが非推奨となり、デフォルトインストールすらされなくなりました。代替として、ifconfigコマンドはipコマンド、netstatコマンドはssコマンドが用意されています。 というわけでさっそくssコマンドを試していたのですが、明らかに動きがおかしなところがあり、少し調べてみました。 そして、「netstatコマンドの代替と思って安易にssコマンドを使うと、これは痛い目に遭うな……」ということが分かったので、不幸になる人を少なくするためにこのエントリを書きました。 概要 結論から先に言うと、CentOS 7/ RHEL 7のssコマンドには「UDPの開放ポートがTCPと報告される」というひどいバグがあり、使うべきではありません。 また、ssコマン
Wikipedia
Mars is the fourth planet from the Sun. It was formed approximately 4.5 billion years ago, is a terrestrial planet and is the second smallest of the Solar System's planets with a diameter of 6,779 km (4,212 mi). A Martian solar day (sol) is 24.5 hours and a Martian solar year is 1.88 Earth years (687 Earth days). Mars has two small and irregular natural satellites: Phobos and Deimos. Carbon dioxid
Skiena's Audio Lectures
Below are audio, video and lecture sides for 1997 and 2007. Since the lectures are 10 years apart some of the topics covered by the course have changed. The 1997 lectures have a better quality video and audio than the 2007, although the 2007 covers the newer material and has better lecture notes. If you found this useful also check out the video lectures of my Discrete Mathematics, Computational B
Scaling Apache Storm - Strata + Hadoop World 2014
Badai Aqrandista, Confluent, Senior Technical Support Engineer This session will be about a common issue in the Kafka Producer: producer batch expiry. We will be discussing the Kafka Producer internals, its common causes, such as a slow network or small batching, and how to overcome them. We will also be sharing some examples along the way! https://www.meetup.com/apache-kafka-sydney/events/2796519
SRFI 1: List Library
by Olin Shivers Status This SRFI is currently in final status. Here is an explanation of each status that a SRFI can hold. To provide input on this SRFI, please send email to srfi-1 @nospamsrfi.schemers.org. To subscribe to the list, follow these instructions. You can access previous messages via the mailing list archive. Received: 1998-11-08 Draft: 1998-12-22--1999-03-09 Revised: several times Fi
hopl-may.dvi
Evolving a language in and for the real world: C++ 1991-2006 Bjarne Stroustrup Texas A&M University www.research.att.com/~bs Abstract This paper outlines the history of the C++ programming lan- guage from the early days of its ISO standardization (1991), through the 1998 ISO standard, to the later stages of the C++0x revision of that standard (2006). The emphasis is on the ideals, constraints, pro
Folds and parallelism
Folds and parallelism A Monday recap Someone asked a thoughtful question on Monday about folds, specifically about foldr vs foldl and foldl'. I wasn't very happy with the answers I came up with, because I was in a bit of a rush. Always be suspicious of teachers who get into a muddle if you spring an unexpected question! Do they really know what they're talking about, or are they just good at readi
How we've made Phusion Passenger 5 ("Raptor") up to 4x faster than Unicorn, up to 2x faster than Puma, Torquebox
Phusion Passenger 5 (codename "Raptor") is a web server that's up to 4x faster than Unicorn, and up to 2x faster than Puma and Torquebox. Learn more about Phusion Passenger 5 here. This blog post is part of a series of posts on how we've implemented Phusion Passenger 5. How we’ve made Phusion Passenger 5 (“Raptor”) up to 4x faster than Unicorn, up to 2x faster than Puma, Torquebox The following pe
Kubernetes + Go = Crazy Delicious
What is Kubernetes? And what kind of name is that? Kubernetes is a container cluster management system. Modeled after Google’s internal systems, Kubernetes (or k8s for short) allows users to schedule the running of Docker containers over a cluster of machines. It is a toolset for starting, tracking and finding what work you have running and where it is running. In fact, Kubernetes has been off to
How to Write a Roguelike in 15 Steps - RogueBasin
This is a rough route map for the creators of roguelikes. I'm well aware that there are many possible routes and that no two journeys are the same -- this is a description of one of possibilities and maybe will help you to plan your own. Please add your comments -- maybe we could make this article really helpful. What are your own routes? There is a school of thought in programming that data struc
The Byzantine Generals Problem - Microsoft Research
I have long felt that, because it was posed as a cute problem about philosophers seated around a table, Dijkstra’s dining philosopher’s problem received much more attention than it deserves. (For example, it has probably received more attention in the theory community than the readers/writers problem, which illustrates the same principles and has much more practical importance.) I believed that th
MinGW + mintty -> Windows8.1 - Qiita
モチベーション カッコいいターミナルを使えばカッコいいアレが出来ると思っている Unixコマンドで生きていきたい Windows環境でどうにかしたい Windowsネイティブのターミナル(cmd, PowerShell)は残念だと色々な人が言うけれど，だってWindowsなんだからしょうがないじゃんと思っていた． とはいえ日常的にLinux環境を使うようになると， Win上でもdirではなくlsを打ちたくなる． というかDOSのコマンドを覚えられない cygwinは超重たいので他のはないかな？ minttyというのがカッコいいらしい． 入れてみます． やること Windows8.1上にMinGWとminttyインストールの上， シェルをminttyにしてその他諸々の環境作り 環境 Surface Pro2, Windows8.1 Pro 64bit 参照 Windows に MinGW と
6.828 Fall 2014 Lab 1: PC Bootstrap and GCC Calling Conventions
Lab 1: Booting a PC Handed out Wednesday, September 3, 2014 Due Thursday, September 11, 2014 Introduction This lab is split into three parts. The first part concentrates on getting familiarized with x86 assembly language, the QEMU x86 emulator, and the PC's power-on bootstrap procedure. The second part examines the boot loader for our 6.828 kernel, which resides in the boot directory of the lab tr
Improving Parser Performance using SSE Instructions (in case of PicoHTTPParser)
PCMPxSTRx is a SIMD instruction that can be used for parsing text. In _SIDD_CMP_RANGES mode, it checks at most 16 bytes at once, if each byte is within given set of ranges. Herumi and I have created a wrapper function for the instruction named findchar_fast that iterates though every 16 bytes of a given buffer to find the first occurrence of a byte within a set of given ranges. And the function is
Comprehensive Overview of Storage Scalability in Docker
Try Red Hat products and technologies without setup or configuration fees for 30 days with this shared Openshift and Kubernetes cluster.
The AI Programmer's Bookshelf
The AI Programmer's Bookshelf A list of useful books for game AI programming. (you might also be interested my General Exams Reading List) AI Game Programming Wisdom - Edited by Steve Rabin AI Game Programming Wisdom 2 - Edited by Steve Rabin AI Game Programming Wisdom 3 - Edited by Steve Rabin AI Game Programming Wisdom 4 - Edited by Steve Rabin Programming Game AI by Example - Mat Buckland AI Te
Download Anaconda Distribution | Anaconda
Distribution Register to get everything you need to get started on your workstation Distribution installation on Windows, MacOS, or Linux Easily search and install thousands of data science, machine learning, and AI packages Manage packages and environments from a desktop application or work from the command line Deploy across hardware and software platforms Commercial use at a company of more tha
Command-line tools can be 235x faster than your Hadoop cluster | Adam Drake
I help boards and executives at growth-stage technology companies continue (or resume) rapid acceleration by advising them on improving their leadership capabilities, operations, and technology. While I specialize in executive advising on leadership and process, I can also dive into deep technical problems with Data Science or Software Engineering departments. Feel free to contact me directly to l
Neat Algorithms - Paxos - Will You Harry Me
This is an explanation and demonstration of an extraordinarily neat algorithm called Paxos. Paxos is a family of algorithms for teaching a whole bunch of decidedly unreliable processes to reliably decide on stuff. More formally: it allows a group of unreliable processors to deterministically and safely reach consensus if some certain conditions can be met, while ensuring the group remains consiste
研究方法
■心構え（研究室配属） 研究室リテラシー (島田 伸敬) 増井研でこの先生きのこるには（慶応大学増井研究室・@shokai）…大学の研究室の生活についての解説． 伊藤研究室への配属志望学生の皆さんへ (お茶の水女子大学 伊藤研究室) アカデミックマナーの心得 (東京大学大学院 情報学環・学際情報学府) 研究が進まないとき，どうするかー「研究が何であるか」まだわかっていない言語研究者の卵のための助言ー (黒田 航) ■心構え（大学院進学・留学） 博士課程の誤解と真実 ー進学に向けて、両親を説得した資料をもとにー (小野田 淳人) （2015年版）博士進学が決まったあなたが今すぐに始めるべきこと (発声練習)…ここで書かれていることは，アカデミックポストに応募するだけに限らず，一般的な院生の就職活動にも非常に重要です． 企業での博士・海外での博士 〜IT業界を例にして〜 (お茶の水女子大学 伊
Mastering Concurrent Processes with core.async | Clojure for the Brave and True
One day, while you are walking down the street, you will be surprised, intrigued, and a little disgusted to discover a hot dog vending machine. Your scalp tingling with guilty curiosity, you won’t be able to help yourself from pulling out three dollars and seeing if this contraption actually works. After accepting your money with a click and a whir, it pops out a fresh hot dog, bun and all. The ve
A Quick Comparison of Nim vs. Rust
EDIT (Jan-13): Use Nim’s -d:release instead of --opt:speed flag. Use Rust’s regex! macro, and collections::HashMap instead of BTreeMap. EDIT (Jan-15): Add Rust results with regular expression r"[a-zA-Z0-9_]+". EDIT (Jan-17): Refine Rust code for Zachary Dremann’s pull requests. Edit Rust’s strengths list. EDIT (Mar-12): Merge Zachary Dremann’s pull request for the newest version of Rust. Rust and
AWS(Amazon Web Services)技術資料メモ(2015年3月版) - hiroshixの日記
2015-03-16 AWS(Amazon Web Services)技術資料メモ(2015年3月版) 2015年3月版に更新。 技術資料はココにあるんだけど、散らかってるのでまとめてみた。全体的に資料の日付をチェックした方がいいかも。資料公開からアップデートがある場合も。あとどの資料も最初に概要入っててごめんなさい。 概要的なやつ スタートアップならおさえておきたいAWS入門サービス概要と基礎知識編 スタートアップならおさえておきたいAWS入門サービス概要と基礎知識編 from Hiroshi Takayama →つまづきやすいポイントや不安点など WebサービスStartUP向け AWSスケーラブルな構成例 WebサービスStartUP向け AWSスケーラブルな構成例 from Amazon Web Services Japan →構成例・代表的なサービスの一言紹介・課金関連・サポ
Top 10 Career-Changing Programming Books » Rod Hilton
This post previously appeared on my blog, 'Absolutely No Machete Juggling'. When I graduated with a Computer Science degree ten years ago, I was excited to dive into the world of professional programming. I had done well in school, and I thought I was completely ready to be employed doing my dream job: writing code. What I discovered in my very first interview, however, was that I was massively un
Mesos, Omega, Borg: A Survey : umbrant
Google recently unveiled one of their crown jewels of system infrastructure: Borg, their cluster scheduler. This prompted me to re-read the Mesos and Omega papers, which deal with the same topic. I thought it'd be interested to do a compare and contrast of these systems. Mesos gets credit for the groundbreaking idea of two-level scheduling, Omega improved upon this with an analogy from databases,
Leveraging AWS to Build a Scalable Data Pipeline - High Scalability -
« Sponsored Post: Datadog, Tumblr, Power Admin, Learninghouse, MongoDB, Internap, Aerospike, SignalFx, InMemory.Net, Couchbase, VividCortex, MemSQL, Scalyr, AiScaler, AppDynamics, ManageEngine, Site24x7 | Main | Gone Fishin' 2015 » While at Netflix and LinkedIn Siddharth "Sid" Anand wrote some great articles for HS. Sid is back, this time as a Data Architect at Agari. Original article is here. Dat
VLDB 2015
_ VLDB is a premier annual international forum for data management and database researchers, vendors, practitioners, application developers, and users. The conference will feature research talks, tutorials, demonstrations, and workshops. It will cover current issues in data management, database, and information systems research. Data management and databases remain among the main technological cor
Bottled Water: Real-time integration of PostgreSQL and Kafka | Confluent
Summary: Confluent is starting to explore the integration of databases with event streams. As part of the first step in this exploration, Martin Kleppmann has made a new open source tool called Bottled Water. It lets you transform your PostgreSQL database into a stream of structured Kafka events. This is tremendously useful for data integration. Writing to a database is easy, but getting the data
Prof. Sussman's Reading List
Serving as a TA for Professor Sussman will get you three things: great advice, spectacular reading recommendations, and lots of high quality tea. I can't share the advice or the tea, but I can compile a reading list. Some of the materials on this list represent research paths that lead to unexplored territory. Some are textbooks that express concepts so clearly they will change your life and make
Kaggle Ensembling Guide | MLWave
Model ensembling is a very powerful technique to increase accuracy on a variety of ML tasks. In this article I will share my ensembling approaches for Kaggle Competitions. For the first part we look at creating ensembles from submission files. The second part will look at creating ensembles through stacked generalization/blending. I answer why ensembling reduces the generalization error. Finally I
Redundancy vs dependencies: which is worse?
I believe that there are just two intrinsic forces in programming: You want to minimize redundancy and, ideally, define every piece of knowledge once. You want to minimize dependencies – A should depend on B only if it absolutely must. I think that all other considerations are of the extrinsic real-world kind – domain modeling, usability, schedules, platforms, etc. I also think that I can show how
オンメモリ高速KVSをjavaのstatic変数で実現する - 開発めも２
やりたいことは、メモリの高速さをフルに活かした超シンプルなKVS。 用途は、機械学習アルゴリズムのモデル用。 ・大量のKeyValue値を高速に読み書きできること。 ・モデルはシリアライズを使って、ファイルに保存／読み込みもできるようにしたい。 ・サーバを再起動したり、しばらく使わないときは、ファイルにしておく。 ・モデルを更新したい時もメモリ上のデータに対して高速に操作できる。 そういうシンプルで高速なオンメモリKVSが欲しかった。 しかし、以前にも書いたように、メモリの高速っぷりを活かしたシンプルなKVSはありそうでなかった。 Redisはネットワーク越しに使われることが前提とされているとかなんとかで、その辺りがボトルネックになって素のメモリ処理に比べると桁違いに遅かった。 Tokyo CabinetはTokyo Tyrantと違ってインターナル用途が想定されているものの、レコード数が
OpenBSD on Digital Ocean – Tubsta
For OpenBSD users, it has been pretty disappointing that Digital Ocean didn’t launch other BSDs with introduction of FreeBSD, even though the technical barrier had been removed to allow it. Today, I thought I’d try doing an OpenBSD load again (I have tried before without success due to CPU feature issues) and the results were pleasing – you can now enjoy OpenBSD on Digital Ocean. The key here is u
How parsers and compilers work
1 About this document A few months ago I began a personal project to learn a bit more about how parsers and compilers work. Here are some notes that I made during that project. Maybe they will be of use to you. 1.1 What I want... I'd like to learn how to write parsers and compilers. If I could write my own parsers and compilers, I could do things like: write compilers or parsers for my own little
Swift Functors, Applicatives, and Monads in Pictures
unit and acceptance testing, automation, productivity This is a translation of Functors, Applicatives, And Monads In Pictures from Haskell into Swift. I don't want to take any merit for writing this, I only went through the fun exercise of translating the code snippets in Swift. If you enjoy this post be sure to say thanks to the author of the original version: Aditya Bhargava, @_egonschiele on Tw
Michael O. Church
The literary novel, as far as genres go, is not old: novels have existed in our culture for about three hundred years. If you had a time machine, you could spin the wheel and, upon landing anywhen in that span, utter the sentence, “The novel is dead,” and find as much agreement as dissension. As soon as there was such an institution as the novel, it became fashionable to speculate that it would no
You're in a space of twisty little mazes, all alike :: Strangely Consistent
It started with a mini-challenge on the #perl6 channel. <masak> today's mini-challenge: a 4x4 grid has 24 internal walls. in the power set of these, some of the members are "mazes", by definition grids with a unique path between every two squares. how many mazes exist? For example, here are four randomly selected solution mazes: I have a hidden reason for posing this problem, but that's the subjec
Elixir · How I Start.
Portal Portal is a game that consists of a series of puzzles that must be solved by teleporting the player’s character and simple objects from one place to another. In order to teleport, the player uses the Portal gun to shoot doors onto flat planes, like a floor or a wall. Entering one of those doors teleports you to the other: In this guide we will use the Elixir programming language to build po
Caching object code
In this blog post I want to briefly describe a new feature which landed recently inside Pyston and which also touches one of the most often mentioned feedback we receive: A lot of people are under the impression that LLVM is not ready to be used as a JIT because of the main focus as a static compiler where fast code generation time is not as important as in the JIT usage. While I agree that an LLV
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Game Theory Is Really Counterintuitive
http://www.tkl.iis.u-tokyo.ac.jp/FIRST/pdf/H25FY-5-1.pdf
Pteromys: Interactive Design and Optimization of ree-formed Free-flight Model Airplanes
http://www.cis.upenn.edu/~bcpierce/sf/current/toc.html
Hoare, C. A. R. (1985). ''Communicating Sequential Processes.''
http://www.tkl.iis.u-tokyo.ac.jp/top/modules/newdb/extract/1132/data/ynaga-jip2011.pdf
https://flownet.com/gat/papers/lisp-java.pdf
Your language sucks...
Photo Tourism: Microsoft Research, Interactive Visual Media Group
https://xcalablemp.org/download/publication/2010/HPCC10_XMP.pdf
http://people.csail.mit.edu/bradley/cm5docs/nov06/GettingStartedinStarLisp.pdf
https://www.information-management.com/opinion/complex-event-processing-challenging-real-time-etl
TweetDeck v0.24 Pre-Release: Facebook Integration - TweetDeck's posterous
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2.4. Optimizing code — Scipy lecture notes
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A Word is Worth a Thousand Vectors | Stitch Fix Technology – Multithreaded
All Your IOPS Are Belong To Us - A Pinteresting Case Study in MySQL Performance Optimization
The Fundamental Theorem of Linear Algebra by G. Strang
kmeansicml.pdf
Consistency and Candy Crush: Don't give up on serializability just yet - Neha Narula at dotScale 2015
HPC Industry Leaders Develop Network Communication Framework for Next Generation Programming Models
The hard life of OpenStack application developers - ][ Stefano Maffulli
http://www.dataphoric.com/learn-data-science-the-hard-way/