Monthly Archives: May 2013

“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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