Tag Archives: coffeescript

“Synchronous” MongoDB Calls with Fibers

Posted on 2013/05/15 by rp8

Here I’m showing an example of converting MongoDB node driver into “synchronous” APIs from callback based asynchronous APIs. We define two new classes to wrap up the native Db and Cursor. Two methods are converted: Db.Open and Cursor.toArray. The “sync” … Continue reading →

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Node-Fibers Example

Posted on 2013/05/15 by rp8

With node-fibers, we can write codes in traditionally synchronous fashion and avoid deep nested callback calls without blocking the Node event loop. Below is an example to generate Fibonacci series. Each run resumes the calculation loop and returns a number … Continue reading →

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Mindful of CoffeeScript Function Return Value

Posted on 2013/05/15 by rp8

Here’s a gotcha if you’re not careful when writing CoffeeScript. Notice the generated js code where constructor now returns this._cursor!! #c.coffee Cursor = (cursor) ->   this._cursor = cursor 0 // c.js 1 // Generated by CoffeeScript 1.6.2 2 (function() … Continue reading →

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Encapsulation in Coffee Script

Posted on 2012/10/21 by rp8

m.coffee ——— publicMethod1 = ->   @publicMember1 = "public member 1"   @publicMember2 = "public member 2"   console.log ‘publicMethod1***’   console.log ‘*’ + @publicMember1 publicMethod2 = ->   console.log ‘publicMethod2***’   @publicMethod1()   console.log ‘*’ + @publicMember2 class Foo … Continue reading →

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Write Module in Coffee Script for Node

Posted on 2012/10/20 by rp8

There are a few ways to write a module in Coffee Script for Node. Below are two ways to contrast their usages. Notice how they share data @url and use function @find. 1. user.coffee ————- class User   constructor: (url) … Continue reading →

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Function call in CoffeeScript

Posted on 2012/09/17 by rp8

Here’s a little hassle in CoffeeScript syntax. Calling a function with parameter but without parentheses is fine. Below sample code works. express = require ‘express’ app = express() app.configure ->   app.use express.bodyParser()   app.use express.methodOverride()   app.use app.router app.get … Continue reading →

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