Atlas7

How to find out when the mouse been eating my KitKat? A Mouse Detector built with Light Sensor and LEDs - just another fun project using Intel Edison Board, Arduino, Groove Light Sensor, Groove LEDs. See link below for NodeJS Script (to be run via Intel XDK IoT IDE).

I essentially started from the Groove LED script template and Groove Light Sensor script template, and combined the two ideas together. And we have a Light-sensor triggering LEDs mechanism! :)

See this YouTube demo.

/*jslint node:true, vars:true, bitwise:true, unparam:true */
/*jshint unused:true */
// Leave the above lines for propper jshinting

Atlas7

Like Master Wong says, "this move, basic and simple". (Simple Button-triggered LED device, made with: Intel Edison Board, Groove Button and LED, Intel XDK IoT Edition, NodeJS.).

See this YouTube Demo.

/*jslint node:true, vars:true, bitwise:true, unparam:true */
/*jshint unused:true */
// Leave the above lines for propper jshinting
//Type Node.js Here :)

Atlas7

a Smart Alerting System leveraging Touch Sensor and LED. (Intel Edison Board, Arduino, Grove Touch Sensor and LED, Intel XDK IoT Edition IDE, NodeJS).

See this YouTube demo.

/*jslint node:true, vars:true, bitwise:true, unparam:true */
/*jshint unused:true */
// Leave the above lines for propper jshinting
//Type Node.js Here :)

Atlas7

Quick JavaScript demo:

• parsing function as an argument
• assigning a function as a variable (essentially making a copy of the function under a different name)

function sumIt (a, b) {
	console.log("sumIt...")
	return a + b;
};

Atlas7

Learnt a new type of syntax around function today, so thought I would make a quick note here!

The following two examples are equivalent:

Example 1

var i = 1;
console.log( function (j) {return j+100} (i) ) ;
// return 101

Atlas7

Follow this Udacity Instruction to put create a simple web app via Google App Engine.

Youtube Link here.

Install the Python App Engine SDK (for Mac, in my case).

After installation some new symbolic links are created under /usr/local/bin - taken a snapshot for future refernce (just in case!)

Atlas7

Learnt something new today. If we are to perform an inline commenting within a Jinja2 HTMl template...

The following will be rendered as a comment - via the {# and #} tags.

{# {{ Hello World }} #}

The following however may cause problem - because Jinja2 will try to parse the Python variable Hello and World, which may not exist.

Atlas7

Learnt about Hashing via Udacity Web Development CS253 Course. Some notes...

What is hashing

Hashing is good for:

• encrypting clear-text messages.
• verifying files.

Use case

Atlas7

Dan Rodney has some great Mac shortcuts at his blog here. Below are some of my favorites.

shortcut	description
cmd + tab	switch apps
cmd + alt + left/right arrow	switch tab within an app
cmd + ` (backtick)	switch windows within the same app

Atlas7

Some simple iPython scripts to illustrate the use of Python urllib2 library. e.g. to interact with the web.

Unknown:apps johnny$ ipython
Python 2.7.10 |Anaconda 2.4.0 (x86_64)| (default, Oct 19 2015, 18:31:17) 
Type "copyright", "credits" or "license" for more information.

IPython 4.0.0 -- An enhanced Interactive Python.
?         -> Introduction and overview of IPython's features.
%quickref -> Quick reference.