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Author Archives: Antonio Santiago

A Computer Science as profession and hobby. Firm believer of Software Engineering and a lover of Agile methodologies. There is no ring to rule them all, every place needs to forge its own master ring. His main field of experience is the Java ecosystem, and he has also worked actively with many related web technologies while looking to improve the client side of web applications.

The mystery of no flash session variables in Express + Passport auth

Someday I started an application using NodeJS with ExpressJS framework and decided to use passport for authenticate the users. As many other times I wanted to use flash messages so, when user authentication fails, the application shows a message informing about bad credentials. Nothing new on the horizon until…. OMG !!! I can’t see the flash messages !!! Disclaimer: This is ...

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Why OpenLayers3 does not render my GeoJSON?

OpenLayers3 offers the ol.source.GeoJSON class that allows to read data from a GeoJSON source (an URL, a JavaScript object or a text string). Maybe you, like me, has spent some time trying to understand why your GeoJSON data is not rendering properly: projection is fine, your GeoJSON is well formed and validated but OpenLayers3 doesn’t return any features and so ...

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How the JavaScript heatmap implementation works?

A heatmap is a powerful way to visualise data. Given a matrix of data each value is represented by a color. The implementation of the heatmap algorithm is expensive in computation terms: for each grid’s pixel you need to compute its colour from a set of known values. As you can thing, it is not feasible to be implement it on the ...

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7 reasons to use Yeoman’s angular-fullstack generator

For my next project and, after looking for candidates and reading some hundreds of lines of documentation, I finally choose to work with the so called MEAN stack: mongodb, express, angular and node. As with any other technology ecosystem, the great number of frameworks, libraries and tools can make our choice a challenge, and JavaScript is not an exception. But for ...

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Things I learned creating a jQuery Plugin (Part II)

This post is the continuation of the series Things I learned creating a jQuery Plugin. In the first part we have seen how the structure of a jQuery plugin must be, the plugin entry point (so called wrapper function) and how we can control the behavior of a method as a getter or setter. Define default options Your plugin more probably will accept ...

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Things I learnt creating a jQuery Plugin (Part I)

jQuery is one of the most used JavaScript libraries, if not the most used one, which allows to make great things with the big set of little tools it offers to the web developers: HTML/DOM manipulation, CSS manipulation, HTML event methods, effects and animations, AJAX, utilities, … One of the key aspects of jQuery is the possibility to extend it ...

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