Sublime Text Navigation History Plugin

Ever wanted to be able to jump between files or functions in sublime text and easily jump back to where you were before? Well worry no longer ­čÖé

Over the past 6 months I’ve been using a navigation script from http://www.sublimetext.com/forum/viewtopic.php?f=5&t=2738┬áto make jumping around code faster. For some reason no one has put this into package control, so I added it today, pull request is pending and once it’s merged you can search for “Navigation history” to find it.

I also made one slight improvement so that when you use Sublime Text 3’s new goto functionality you can easily get back to exactly where you were before.

The github repository is here: https://github.com/timjrobinson/SublimeNavigationHistory

Enjoy, and if you encounter any bugs or problems please create an issue for it on Github.

 

Multiplayer online Tower Defense incoming :)

The past few months I’ve been working on a browser based multiplayer tower defense game called Tower Storm, because it’s something I’ve been wanting to build for years.

I had originally planned for it to be PvE where players work together to kill monsters similar to Azure Tower Defense, however we soon realised while PvE is easier for most people to understand it doesn’t have enough replayability without constantly adding new content.

So I’m focusing on PvP first in the style of Wintermaul Wars┬ábecause I absolutely love it’s gameplay.

I’ve been play testing with friends on the home lan for a while, hopefully will have a version online soon.

 

How to stop NodeJS Mocha unit testing console beeping

Thought I’d create this post to save others the 20 minutes I wasted wondering why NodeJS and Mocha Tests were making my console bleep over and over.

The problem isn’t with node, it’s with windows console beeping whenever the console.error command is sent to it (I believe).

You can disable the bleeping by following the instructions here:

http://superuser.com/questions/10575/turning-off-the-cmd-window-beep-sound

The instructions are also below in case this link is ever broken in the future:

┬áThe Windows command line command “net stop beep” will turn off the beeping, and “net start beep” will turn on the beeping.

And how to disable it permanently:

  1. Right-click My Computer and select Manage.
  2. Expand System Tools and select Device Manager.
  3. From the View menu, select Show hidden devices.
  4. Expand Non-Plug and Play Drivers.
  5. Right-click Beep, and select Properties.
  6. Select the Drivers tab.
  7. Click Stop. You can also change the start-up type to Disabled so the beep service never starts.
 

How to market technology

I was flicking through the jb-hifi magazine while eating breakfast this morning and was seriously amazed that it’s now 2012 and Apple is still the only company that understands how to market technology.

Here’s a hint: 95% of people don’t care about the specs of their phone/tablet (and they didn’t care about laptop specs either). Almost every non geek I’ve ever talked to about computers has no idea what the difference is between AMD and Intel, Ram sizes of even CPU Speeds. All they know and care about are the drive size so they can figure out how much music and movies they can fit on their device and with the rest of the specs they just presume that the bigger number is better.

Seriously apple changed the game way back in 2001 when instead of saying “we have a mp3 player with 128mb of space which runs on a 16Mhz cpu blah blah”, they told people “Fit 1000 songs in your pocket” and showed how much fun they would have using their mp3 players.

Guess what? The iPod went on to become the biggest selling mp3 player ever (It also helped that it was a great product, but so was the Zune and we all know how that ended up).

Now they’re doing the same with phones and tablets and still almost every other manafacturer has their head in the sand.

Samsung figured it out recently too, I saw an awesome ad for the Galaxy III last night about what it could do not what the tech specs were, and do you know who now leads sales in smartphones around the world? Nope not apple, it’s samsung!┬áhttp://www.bgr.com/2012/05/01/apple-samsung-idc-market-share/

Wow look at that, the companies that sell on emotion and benefits instead of specs make the most money! Nah must be a coincidence better go back to selling our 10% faster cpu’s…

 

A Distributed, Open Source, Peer to Peer, Encrypted Data Store

The thing I love and hate most about Facebook is that it has ALL my data. It’s fantastic that third party programs such as AirTime are able to link into Facebook and get all my data to personalize their site experience to me, but it’s bad that Facebook is the one in control of all this data, and one company having a monopoly over everyone’s information is a really bad idea.

What I’d love to see created is something similar to Bitcoin but for data. An open source network of computers that allow you to store any arbitrary data in the network encrypted with your own private key, then┬áretrieve┬áthat data at any time anywhere. I’d imagine it’d be a key-value library system similar to Redis. Apps could then easily integrate with this network to either store or retrieve any data when you give them the key for it. You could possibly have different keys for different types of data or sections of data.

Basically it would allow everything that Facebook does currently but with a data store that no one controls and no one can access unless you give them explicit permission to.

What could be possible using this data store:

  • A radio for your car that via 3G connects to the data store, grabs all your favourite bands / songs / music and streams them + finds and streams related music automatically (like pandora). You could then press if you like or dislike songs and it would save that back to the data store. Then at home on your PC you could load up your favourite music buying site, connect it to the data store, see all the songs you’ve recently enjoyed in your car and purchase them instantly. It would completely disrupt the current radio and music industry and be amazing for the indie music scene.

  • Your fridge auto monitors the food you put into it, and saves out what you’ve consumed to the database, then a shopping list app automatically generates a shopping list based on your personal food preferences and what’s currently missing in your fridge. Taking it one step further it a local grocer (or even farmer!) could tap into the database and auto ship you your weekly food based on what you’ve consumed.

  • Dating sites could grab data for your likes / dislikes, partner preferences and so on to automatically find amazing matches for you (and most people are currently wary of linking dating sites to Facebook).

It would help create an amazingly interconnected world without the need to interface with Facebook or any other companies. Also there are already scripts out there for exporting Facebook data, so it should be easy enough to port your data into this new data store in seconds.

Of course a lot of this is currently possible via Facebook, but most companies are afraid of Facebook and building technology that integrates deeply with it for fear of it not being around in the future or general fear of giving up so much data to another company. With a data store such as this companies are free to integrate as much as they like without worry of anyone taking it away from them, blocking them out or it shutting down.

 

MySQL using SELECT IN (x, y, z) vs one at a time

Finally deployed the Zentester heatmapping re-write today and wanted to share a 3 things I’ve learnt on the way on optimization.

  1. Do “WHERE IN ()” instead of “WHERE =” Wherever possible – The biggest thing I discovered was that when selecting individual rows from a database by doing something like:
SELECT * FROM database WHERE id = 5
SELECT * FROM database WHERE id = 6

It’s much much faster to select them all at once rather than doing it one row at a time. How much faster? In one section of the heatmapping I was grabbing visitor id’s from ipaddresses from the visitors database like so:

SELECT id FROM visitors WHERE ipaddress LIKE 'xxx.xxx.xxx.xxx'

The ipaddress column was a primary key but even then every time I did this query it took approximately 0.1 seconds. I combined all of these into one huge SQL query looking something like this:

SELECT id FROM visitors WHERE ipaddress IN ('xxx.xxx.xxx.xxx', 'yyy.yyy.yyy.yyy', 'zzz.zzz.zzz.zz')

Loading 1000 different rows in this way took just 0.7 seconds. Which equated to a 150 x speed increase over the old approach.

  1. PHP Arrays are really fast – I used to think PHP Associative arrays were slow and It’d be better to just grab everything from MySQL one at a time rather than caching it in php. Oh how wrong I was. I changed the overall code structure of my data processing from the following (psudo code):
while (data) {
$visitorData = SELECT * FROM visitors WHERE ipaddress IN data->ipaddress
$pageData = SELECT * FROM pagedata WHERE page IN data->page
$siteData = SELECT * FROM sitedata WHERE site IN data->site
//Process and insert data into another database
}

To this:

while (data) {
$ipAddressArray[] = $data->ipaddress;
$pageArray[] = $data->page
$siteArray[] = $data->site
}

$ipData = SELECT * FROM visitors WHERE ipaddress IN ($ipAddressArray) 
while ($ipData) {
$ipAddressMap[$ipData->ipaddress] = $ipData->visitorid;
}

$pageData = SELECT * FROM pages WHERE page IN ($pageArray)
while ($pageData) {
$pageMap[$pageData->page] = $pageData->id;
}

$siteData = SELECT * FROM sites WHERE site IN ($siteArray)
while ($siteData) {
$siteMap[$siteData->site] = $siteData->id;
}

while (data) {
//process data using the maps instead of constantly querying the database
}

Instead of looping through all the data to be processed and processing it one at a time It’s figuring out up front every single piece of data that’s going to be needed from the database and grabbing it in just a few queries.

Then all this data is stored in associate php arrays (which actually hash the keys of the array so you can make the array keys literally anything, in one case ip addresses were used as the key). Then everything is processed grabbing the data out of these php associative arrays rather than pulling it from the database every single time.

I’m processing approximately 10,000 rows of data at a time and after implementing this change it went from taking 5 – 10 minutes to process down to 10 – 15 seconds.

  1. Batch your inserts – I also got a small speed increase by combining all my inserts into one large statement, though don’t make this statement too large or MySQL will run out of memory when you try to run it (I discovered about 5000 inserts at once works best for me). Batching inserting took the insert time from about 60 seconds down to about 10, so it wasn’t as huge of an increase as the batched SELECT but it is noticeable especially when you’re dealing with lots of data.
 

Netbeans is awesome

If you still can’t find that ‘perfect’ IDE give Netbeans a try. I was recently introduced it and am still blown away by the amount of functionality and features it has. It’s similar to eclipse but I always found eclipse to be too sluggish to use on windows (everything seemed to take half a second to do which adds up and gets frustrating very fast).

The main things I like

  • Plugins for things like CoffeeScript, SCSS, Maven etc which make life a lot easier.
  • Shortcuts for just about everything, so if you’re a keyboard ninja you can get things done really fast.
  • It has everything else you’d expect in an IDE (code completion, jumping to definitions etc).

I’ve been using PHPDesigner for about 2 years now and although it’s great for developing in PHP it doesn’t have the best support for other languages such as Javascript, Coffeescript and Ruby.

If you’re a Windows coder give it a whirl, it’s open source and free.

 

Coffeescript Classes and Public / Private functions

So I’ve seen some coders confused by how they should declare their functions in Coffeescript. Here’s some notes I took while learning on how to make the equivilant of Public and Private functions for your class in Coffeescript. Because of the way javascript works it’s not possible to have private functions in the way you’re used to with C / Java howevever you can come close.

Public Function –┬áThis is your bread and butter function, it is what most coders use by default with coffeescript and is accessible from outside the class. ┬áNotice how it uses a colon after the function name instead of an equals sign.

class SomeClass
functionName: ->
alert('hello world');        

Private function –┬áThis will create a private function as it makes the function a variable inside the class. So the function is a closure and can only be accessed by functions of that class. Notice how it uses an equal sign instead of a colon.

class SomeClass
functionName = ->
alert('hello world');

There are two catches with Private Functions. The first is because they are a completely seperate function the @ (this) variable will not point to the main object (even though it is called from another internal function). If you wish to use @ in a private function whenever you call the private function it you must use .call(this) which will load the function but use the main class object as the @ variable inside it. For example:

class Dog
dogName: "fido"
constructor: (@dogName) ->

doStuff: ->
alert('the dog is walking');
sayHello.call(this);

sayHello = ->
alert("Hi! I'm "+@dogName);

ralph = new Dog("ralph");
ralph.doStuff();

peter = new Dog("peter");
peter.doStuff();

If you run this example yourself you’ll notice both dogs have separate names and have the private function sayName. The sayName function cannot be called from outside the class (if you try and call it you’ll get an error) which is exactly how private functions should work.

The second catch is that this private function is shared for every dog. This isn’t really an issue for private functions as whenever you use @ the @ variables are specific to each dog. Though it is an issue if you wish to create private variables for your dog, as if you create them in this way they will be shared between every dog which is most likely not what you want.

If you have any questions or queries let me know via the contact form.

 

Seeing the future

The best startups are the ones that can see trends and start working on their product before the trend even makes it into the early adopter market. Google did this well, they saw the information in the world was increasing expontentially and realized people need a better way to find things.

There’s a new startup on the block that has seen the future. It’s called zaarly (and there are a few others in this space I believe, but it’s hard to track any down), and it’s going to explode in the next 5 to 10 years, because they see where the world is trending.

The income divide between upper and middle class is growing, everyone knows that. But what most have missed is that the upper class is becoming more and more time poor and cash rich, while the lower classes are becoming more time rich and cash poor.

Do you see the opportunity here?

Traditional freelance systems and craigslist are great if you have a big task you want someone to handle, or want something in a few days. But most of our days are not taken up by big tasks, and we all want things done right this instant. This is what Zaarly delivers,  making it quick and easy to get these little things done faster than ever before.

Zipments is another awesome startup idea along the same lines, focusing on peer to peer couriering.

The second cool thing all these startups are doing is making the world a better place. They’re providing a real way for the huge number of unemployed people to earn some cash and not sit around bored all day, and weaken the stranglehold big corporations currently have on the world. As the income gap increases more and more peer to peer services like these are going to help make the world a better and much more enjoyable place for everyone which is friggin awesome.

 

Resurrection

It’s been a while. Dreamhost deleted all my sites when downgrading my service. Luckily the only site I cared about still hosted with them is this blog.

Here I’ll be sharing thoughts on things that interests me, probably about coding, business, life improvement or learning new things. In fact it’ll probably be a lot like Tim Ferris’s blog, but not as popular (yet).

It’ll be full of geeky stuff like nodejs, hacking (ycombinator style) and why zaarly is the coolest idea around (seriously, this shit is going to go crazy in 5 – 10 years, you’ll see).

I’ll also try and explain some of the crazy ideas that waft around in my brain, mostly psychology related, sometimes business related and somehow they’ll always relate back to women.

I’ll try and keep my posts as short and to the point as possible, as I tend to waffle way too much some times (look I just did it there!)

That enough for now, enjoy.