Howard Lee Cloud

軟體工程 No routes matches ‘/users/sign_out’ of Devise gem using jquery-migrate-min.js in Rails 4

By Howard Lee 19 April 2016

Situation: After trying to use slick plugin of jquery using log-in user, I want to sign out. The screen shows 'No routes matches '/users/sign_out' ' when I click the link of sign-out. Before trying slick plugin, /users/sign_out route of devise gem works as normal. Cause: The addtional js jquery-migrate-min, which required for slick plugin, makes rails misunderstood original route for /users/sign_out . Environment: Rails 4.2.5.1, Devise 3.5.5, Jquery-migrate-rails 1.2.1 Solution:

軟體工程 Configurations and programming examples about Grape, Doorkeeper and Wine_bouncer in a rails 4 app

By Howard Lee 17 April 2016

This article works for both of production and development environment and not like other articles only work for development. The tested environment are Rails 4.2.5.1, Ruby 2.3.0, Doorkeeper 3.1.0, Grape 0.14.0, Grape-kaminari 0.1.8, Wine_Bouncer 0.5.1 and Devise 3.5.5 . 1. Sample configuration for Grape gem in Rails app projects. 列出Grape gem的設定檔範例 In config/application.rb, add below two

軟體工程 Position No Captcha reCaptcha to center

By Howard Lee 11 April 2016

From this link: http://stackoverflow.com/questions/27411581/centering-no-captcha-recaptcha/29836372?sgp=2#29836372, I have learned how to use css to position No Captcha reCaptcha at horizonal center inside a page. Belows are sass-syntax code. .your-recaptcha-class display: inline-block text-align: center inline-block means to represent your element to be text-feature and block-feature. Its format wouldn’t generate a new line with other elements itself and it’s also to be configured with padding, width, heigth, background-image attributes, …, etc. Extra reference about

軟體工程 Using Coffeescript to classify objects based on their value of attributes

By Howard Lee 29 March 2016

We could classify objects of javascript or JSON ones to different groups based on their attributes' values. I modified original example as below coffeescript code from Reference link. Suppose you have an array-variable of JSON objects and a variable of Object, and you want to classify or group them based on values of their date attributes. warehouseOfClassifiedJSONObj = new Object(); arrayOfJSONObj = [ {name:"taro", date:"1996-01-01", total_average_price: 50}, {name: "flower", date:

軟體工程為 Postgres 全文搜尋加速 - 在表格加上 tsvector

By Howard Lee 24 March 2016

寫了一陣子的英文部落格文章，這篇用中文書寫調劑一下。Postgres 在 8.3 版之後的版本開始提供全文搜尋功能，資料表上若沒加上 tsvector 的欄位，每次查詢

軟體工程 How do I use tools to debug CoffeeScript/Javascript files

By Howard Lee 23 March 2016

I use following codes and tools to debug files of CoffeeScript/JavaScript: Safari browser’s developer tool set breakpoints at debugger tab of javascript files responsive design mode of developer tool can help us to see what a web page is rendered. coffeescript code if myVariable? # this statement can check whether this variable has its value(s), null or undefined. If it has value, this statement would return true, otherwise false. alert

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