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Back when I was an undergraduate, as part of a class called “Computer Systems Engineering”, we read numerous classic papers of systems design. I enjoyed and learned a great deal from many of these papers, but one that paper that has stuck with me in particular was Saltzer et al’s “End-to-End Arguments in Systems Design”. The paper is a very general tract on systems design – it does explore several examples of concrete systems or application..
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In this tutorial, we will learn how to effectively use Anki flashcards for learning mathematics. For this, we are going add a little bit of magic to our cards by using MathJax and LaTeX .
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In this tutorial, we will learn how to effectively use Anki flashcards for learning mathematics. For this, we are going add a little bit of magic to our cards by using MathJax and LaTeX .
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I'm typing this up as I'm sitting at the airport, on my way to St Petersburg, Russia to speak at pitercss conference and it still seems slightly surreal to me.…
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Like many other parents, I’ve struggled to make sense of the current president in the context of parenthood. How do you even talk about it? But I’ve realized that much can be taught by studying the commander-in-clown’s example. After all he’s the perfect anti-role model for young kids, teens, and adults of all ages: someone we should all aspire not to be when we grow up. Here are the top five lessons we can learn from our president. ....
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안녕하세요 너무 늦게 답변드린것같습니다 디버그관련해서 서버설정을 어떻게하는지 몰라서 시간날때마다 고민중이였는데 이제 디버그 내역이 활성화됬네요 [09-Jun-2017 15:20:10 UTC] PHP Fatal error: Uncaught Error: Cannot use object of type WP_Error as array in /var/www/html/wordpress/wp-content/plugins/cosmosfarm-members/class/Cosmosfarm_Members_Security.class.php:265 Stack trace: #0 /var/www/html/wordpress/wp-content/plugins/cosmosfarm-members/class/Cosmosfarm_Members_Security.class.php(124): Cosmosfarm....
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At Localytics , one of the tools we use for data processing is the Snowflake data warehouse. We connect to Snowflake in a couple different ways, but our main data retrieval application is a Ruby on Rails API. To accomplish this we use a combination of unixODBC (an open-source implementation of
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There often comes a time in an open-source project’s lifecycle when the original maintainer needs to move on. Today, that person is me, and…
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Measuring Performance Improvements in .NET Core with BenchmarkDotNet (Part 1)
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aakinshin.net
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9 years ago
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eng
A few days ago Stephen Toub published a great post at the Microsoft .NET Blog : Performance Improvements in .NET Core . He showed some significant performance changes in .NET Core 2.0 Preview 1 (compared with .NET Framework 4.7). The .NET Core uses RyuJIT for generating assembly code. When I first tried RyuJIT (e.g., CTP2 , CTP5 , 2014), I wasn’t excited about this: the preview versions had some bugs, and it worked slowly on my applic....
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Measuring Performance Improvements in .NET Core with BenchmarkDotNet (Part 1)
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aakinshin.net
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9 years ago
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eng
A few days ago Stephen Toub published a great post at the Microsoft .NET Blog : Performance Improvements in .NET Core . He showed some significant performance changes in .NET Core 2.0 Preview 1 (compared with .NET Framework 4.7). The .NET Core uses RyuJIT for generating assembly code. When I first tried RyuJIT (e.g., CTP2 , CTP5 , 2014), I wasn’t excited about this: the preview versions had some bugs, and it worked slowly on my applic....
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Serverless v1.15 - CLI autocomplete & Cognito User Pool trigger events added
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www.serverless.com
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9 years ago
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eng
CLI autocomplete, Cognito User Pool Trigger event source, KMS Key support and more in the Serverless Framework v1.15 release.
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A massive amount of reporting queries, whether really intensive data analysis, or just basic insights into your business involving looking at data over a certain time period. Postgres has really rich support for dealing with time out of the box, something that’s often very underweighted when dealing with a database. Sure, if you have a time-series database it’s implied, but even then how flexible and friendly is it from a query perspective?....
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A massive amount of reporting queries, whether really intensive data analysis, or just basic insights into your business involving looking at data over a certain time period. Postgres has really rich support for dealing with time out of the box, something that’s often very underweighted when dealing with a database. Sure, if you have a time-series database it’s implied, but even then how flexible and friendly is it from a query perspective?....
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It’s been over 10 years since Cross Site Scripting (XSS) became big news, awareness has grown and defenses have become much more sophisticated. But, as we show in this post, recent data indicates XSS attacks are only increasing.
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Prelude This is the final post in a four part series discussing the mechanics and design behind pointers, stacks, heaps, escape analysis and value/pointer semantics in Go. This post focuses on data and the design philosophies of applying value/pointer semantics in your code. Index of the four part series: Language Mechanics On Stacks And Pointers Language Mechanics On Escape Analysis Language Mechanics On Memory Profiling Design..
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As of this writing there are two major versions of Snapcraft: v1 and v2. Snapcraft v1 creates snaps that target Ubuntu Core 15, and Snapcraft v2 creates snaps that target Ubuntu Core 16. Series 16 snaps are much more widely used, being supported not only in Ubuntu Core 16 but also classic Ubuntu Xenial (desktop and server) and more recently even Trusty! It’s also supported across a range of other Linux distributions.
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With the speed of technological development these days, business agility - the ability to adapt quickly to a changing competitive landscape - is a term that has been repeated often by executives and in company boards. However, when going from XX to XXI century speed is not trivial, leading to innumerous organization transformation initiatives. So much so that many organizations are already feeling transformation fatigue - the sinking feelin..
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Today we are open-sourcing Cogito , an abstraction of AWS IAM syntax. IAM (Identity and Access Management) is AWS’s module that dictates the ability of various users and resources to mutate other resources within the AWS ecosystem. Permissions are described through a JSON-structured policy document that lives within the
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Snyk has launched our next integration with Bitbucket Server, Atlassian’s Git solution for professional teams.
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500 에러가 발생되는 이유를 알아보기 위해서 워드프레스 디버그 모드를 활성화 해서 오류가 없는지 체...
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www.cosmosfarm.com
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9 years ago
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kor
500 에러가 발생되는 이유를 알아보기 위해서 워드프레스 디버그 모드를 활성화 해서 오류가 없는지 체크 해보셔야 할 듯합니다. 워드프레스의 wp-config.php 파일에서 define('WP_DEBUG', false ); -> define('WP_DEBUG', true ); 이렇게 수정해주시면 디버그 모드가 활성화 됩니다. 또는 워드프레스 디버그 모드 대신 아래 플러그인으로 오류 내용을 확인할 수 있습니다. https://ko.wordpress.org/plugins/error-log-monitor/ 오류 내용을 올려주시겠어요? 저희도 플러그인에 버그가 있는지 체크해보겠습니다.
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Storage is one of the big subjects we can delve into and never come out. Even without going into offshoots such as parsing, networking etc. it’s still a pretty huge subject. We tried to simplify a lot of these problems by splitting file system from storage in Codename One but this often caused a different type of confusion. Because I tried to keep the video very simple I also didn’t get into too many samples or variations e.g. no externa..
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Do you think of yourself as a self-inflicted masochist? I doubt it. Yet, I bet you are quite often acting as a such. Give me a few minutes and I’ll find a few things that hurt you, but you keep on doing. You might be drinking alcohol or caffeine, or taking other drugs, mindlessly shopping, getting really stressed about things you can’t change, or smearing hot sauce all over your take-out food which you don’t like. We all do such things.....
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Using Pandas and SQLAlchemy to create a database for your Flask App Flask and SQLAlchemy Magic Change Primary Key Dug deeper into pushing a pandas dataframe into a postgres database via sqlalchemy. The main situation I’m running into is that a postgres table created from a pandas dataframe using the to_sql method does not specifiy a Primary Key. There is no way to specify a primary key using that method, as of now.
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You might have noticed that I haven’t been committing as much code recently. It’s because I’ve been working on 3 new online Codename One courses. One of my main goals with the bootcamp was to improve my video skills and modernize course materials. I’m well on my way with both and created pretty exhaustive materials so far. Since these courses require a lot of work it’s hard to provide a set date for their release but I hope I’ll be able..
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The hypothesis and the setup This blog post has an interactive demo (mostly used toward the end of the post). The source for this demo is available in a Github repository. Last time we saw how the inner product of two vectors gives rise to a decision rule: if $ w$ is the normal to a line (or hyperplane) $ L$, the sign of the inner product $ \langle x, w \rangle$ tells you whether $ x$ is on the same side of $ L$ as $ w$.
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The hypothesis and the setup This blog post has an interactive demo (mostly used toward the end of the post). The source for this demo is available in a Github repository. Last time we saw how the inner product of two vectors gives rise to a decision rule: if $ w$ is the normal to a line (or hyperplane) $ L$, the sign of the inner product $ \langle x, w \rangle$ tells you whether $ x$ is on the same side of $ L$ as $ w$.
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The hypothesis and the setup This blog post has an interactive demo (mostly used toward the end of the post). The source for this demo is available in a Github repository. Last time we saw how the inner product of two vectors gives rise to a decision rule: if $ w$ is the normal to a line (or hyperplane) $ L$, the sign of the inner product $ \langle x, w \rangle$ tells you whether $ x$ is on the same side of $ L$ as $ w$.
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Quite a bit of time has passed since my two years of NoFlo post, and it is time to take another look at the state of the NoFlo ecosystem . To start with the basics, NoFlo is a JavaScript implementation of Flow-Based Programming : In computer programming, flow-based programming (FBP) is a programming paradigm that defines applications as networks of “black box” processes, which exchange data across predefined connections by message p....
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BenchmarkDotNet v0.10.7 has been released. In this post, I will briefly cover the following features: LINQPad support Filters and categories Updated Setup/Cleanup attributes Better Value Types support Building Sources on Linux
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Why on earth would anyone want to buy a video game the size of a refrigerator?!? The simple answer: It’s the best bang for your buck! Since the dawn of video games in the 1970s, video game makers have been all about making as much money as they can. Today, a game console will cost you about $500, and the games anywhere from $40-80 each on top of it. - if you go the Nintendo route, expect to sink just as much if not more. A gaming PC i..
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Why on earth would anyone want to buy a video game the size of a refrigerator?!? The simple answer: It’s the best bang for your buck! Since the dawn of video games in the 1970s, video game makers have been all about making as much money as they can. Today, a game console will cost you about $500, and the games anywhere from $40-80 each on top of it. - if you go the Nintendo route, expect to sink just as much if not more. A gaming PC i..
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BenchmarkDotNet v0.10.7 has been released. In this post, I will briefly cover the following features: LINQPad support Filters and categories Updated Setup/Cleanup attributes Better Value Types support Building Sources on Linux
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Leveraging CSS Variable scope improves the size, specificity, and semantics of our stylesheets. This article talks all about what CSS Variables are and how we can leverage scope to improve our styling.
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I did some restructuring today. Figured out that the best approach would be to keep all my main objects in the sps.py file. So I deleted database.py and moved it into a Database class in the sps module. I create a Scraper object and a Database object to use. Now it’s a cleaner interface, yay. import sps scraper = sps.Scraper() database = sps.Database() report = scraper.inventory_report() database.add_report(report) Keep it as simple a..
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So you’re developing a complex application. Maybe it has some really specific dependencies, or requires a lot of setup. In many cases (such as my own), it’s a web application. I have a suite of tests, varying all the way from unit tests through integration tests. The latter typically uses Selenium, and I often integrate it with Sauce Labs. I’ve written an article about this before. However, even those integration tests aren’t testing the re..
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Quite a bit of time has passed since my two years of NoFlo post, and it is time to take another look at the state of the NoFlo ecosystem . To start with the basics, NoFlo is a JavaScript implementation of Flow-Based Programming : In computer programming, flow-based programming (FBP) is a programming paradigm that defines applications as networks of “black box” processes, which exchange data across predefined connections by message p....
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Quite a bit of time has passed since my two years of NoFlo post, and it is time to take another look at the state of the NoFlo ecosystem . To start with the basics, NoFlo is a JavaScript implementation of Flow-Based Programming : In computer programming, flow-based programming (FBP) is a programming paradigm that defines applications as networks of “black box” processes, which exchange data across predefined connections by message p....
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You are the CEO of a company. There is no board of directors. The fate of the company lies solely on you. Every day, you make decisions that determine the success of the company. Some days you might make good decisions, and some days you won’t. You might have some trusted advisors that guide you in your role as CEO. But it’s not their job to lead the company to success, it’s yours. You can take their advice or you can ignore it, but i..
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This is the first of a five-part ‘short story’ series regarding the RAID log. Meet the RAID log “Well, if it is not in her RAID log, I am 99.99% sure it is not happening.” So said one exec to the rest of the executive steering committee. That is the power of a well-maintained RAID log. It brings confidence to your key stakeholders and executives.
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Serverless Framework Engineer Eslam Hefnawy explores creative use cases for using Serverless Variables to optimize and automate operations.
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A common request over the past couple of years has been to add a text field that supports a clear button in the end, we used to have a common answer on how this can be implemented but we didn’t have an actual implementation builtin despite this being a relatively common request. At first I thought this is something we should implement natively but it turns out that this doesn’t exist natively in Android so we just implemented this as a wr..
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