I'm recently upgrading to OSX 10.11 El Captain and something went wrong with my Crystal compiler. Libraries are not linked properly and the following message bumped up when I wanted to compile or run Crystal programs: ld: library not found for -levent It turns out that people
Rubocop is powerful, but it is a pain in the ass if you take over an existing project. There might be hundreds of files that is badly formatted and you can't find a way to start. Here's how I find a starting point: 1. List all
Crystal code formatter comes with 0.9.0 release. It is a tool for automatically checking and correcting the style of code in a project. Like Ruby, Crystal does not force styling in format, but following a specific way of formatting code will make your project more accessible to others.
I've been working on building a web framework in Crystal called Iceberg. It aims to be a full-stack MVC web framework like Rails. However, I keep running into problems that make me think: Is it worth to build a Rails clone in Crystal? Rails is highly productive The
We love using Crystal, but a compiled language is hard to be as dynamic as Ruby. This makes developers hard to test out basic ideas with REPL or tools like Ruby irb. However, we can use a well-known C++ tool fswatch to watch and auto-execute the file for us. Without
Crystal official website offers a simple example on how to initiate an http server. This post brings it a little further by implementing basic routing functionality. Fetching Request Path The idea of routing is based on the requested path. Thus we can make use of request parameter in the block
Crystal is a new programming language started in 2012. The creators listed several features: * Ruby-like Syntax * Static Type * Compiled * Self-hosted Also, the purpose of this language is simple: * Syntax is as friendly as Ruby * Performance is as great as C There are more features listed on the official website. However,
Rails offers various ways to implement methods, but implementing global variables is not as straightforward. Currenly, there are several approaches. Constants One Solution on Stackoverflow is to put them in config/application.rb as follow: module MyAppName class Application < Rails::Application MY_CONSTANT = "test" end end It
In a Rails project, we use Capybara for feature (end to end) testing. However, Capybara is also good for crawling a page without Rails. Any data within a specific pattern can be obtained with ease. We can create a simple web crawler within a single file with Capybara DSL. How
更新 演講錄影連結 投影片 本文 RubyConf 2015 Taiwan即將在9/11、9/12登場，這次超多講者，議程也非常豐富，很多A、B場次分開的場合，實在也不知道要怎麼選。 官網上有列出所有議程，以下幾個幾個議程是我非常期待的： 李智樺：未來的專案開發 The future of project development 在專案開發來說，目前軟體界普遍盛行的應該多數還是一般瀑布式和敏捷式。儘管許多企業打著招牌說他們都是採用敏捷開發，但根據本人經驗，真正實際執行，還是「說什麼做什麼」也就是說整體規劃還是把要做的1,2,3列出來，交辦下去給不同團隊的成員處理。現在市場上最困難的還是「變」，也就是系統開發到一半，結果因為一些不明原因，導致規格大幅翻修，如果沒有特別的專案管理模式，這樣的問題會超難解決。敏捷式開發已經內含了許多能夠解決這些問題的運作模式，但在公司實際的實踐上還是需要一些心力。 林鈺翔：Need for Speed: Boost ruby
目標 利用Google AdWords API讀取AdWords帳戶內的廣告活動成效資料。 1. 選定一個帳號 選定一個你要存取Google AdWords API的帳號，由於申請API需要人工審核，因此需要使用這個帳號提出申請，以下皆稱此帳號為「選定的帳號」。 2. 註冊Google Cloud憑證 英文流程在Github上有記錄 簡單來說： 1. 在Developer Console當中建立一個新的專案 2. 在「憑證」項目底下建立一個用戶端ID 3. 選擇「已安裝的應用程式」，並選擇「其他」 最後會取得畫面上出現的「用戶端ID」和「用戶端密碼」，記好，晚點會用。 3. 註冊AdWords使用者權杖 1. 進入AdWords 2. 點擊右上角的齒輪，選擇「帳戶設定」 3. 如果你的權限可以管理此帳戶的所有廣告，左邊bar會出現一個「AdWords API中心」選項，
在Linkedin上的社團有篇討論，講到如何區分Rails的資深和資淺開發者，條列出許多「實作過」及「應該了解」的項目。簡單來說，資淺的Rails開發者只摸過皮毛，但資深的Rails開發者有確實操作且了解所有相關的套件及Rails本身的歷史及優缺點。 要區分所有Web技術開發者是資深與否，其實大同小異。以下我編修原文的說法，並補充一些自己的看法： Scaling及效能 資淺開發者並未接觸過擴大規模(scaling)的問題，尤其Rails在scaling的問題上會比其他例如PHP的部分框架來得更難處理。 資深開發者不會隨意進行scaling，而會先從效能方面著手，他們知道如何測試效能、碰到效能問題時知道從何下手、在實際線上的應用程式中知道該如何改善效能。雖然Rails社群常常有老手說「Rails根本不用管scaling」，但那只是玩笑話，實際使用必定會碰到效能問題。 佈署 資淺開發者可能只使用過一種佈署工具，或是完全沒碰過。 資深開發者使用過多種佈署方式，例如Capistrano、Mina等等工具，以及Heroku、一般VPS等佈署環境，並且了解各個工具和環境之間
