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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 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

軟體工程 CoffeeScript gets URL parameters for HTML select tags' multiple options

By Howard Lee 22 March 2016

Use CoffeeScript and JQuery to bind click event at website for getting parameters of a form at URL. In someone.js.coffee file. The following example is modified from reference 1,2,3 and 4 to meet my need. get_parameters_from_url = -> aryParams = {} # Initial an empty object rawVars = window.location.search.substring(1).split("&") #window is used to getting global variables of browsers in coffeescript. location.search is the query string at URL including the question

軟體工程 Event-handling and function with JQuery in CoffeeScript | 在CoffeeScript裡使用JQuery Event-handling

By Howard Lee 17 March 2016

Wanna use functions, which are defined in files of coffeescript language, to change one of CSS attributes such as display when an user clicking a button or element at a web page? You can follow below instructions. At side of web page, for example: Write down a button of HTML 5 for triggering event <button type="button" name="btn-veggie-list" class="btn-veggie-list">Veggie list</button> Target HTML. For example, it’s an unordered list for items in

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