Smalltalk with James Robertson

I had a brain cramp in the editing process for episode 4 - I've reposted all three audio files.

Technorati Tags: skyrim

Today's Smalltalk 4 You looks at installing GlorpDBX into Pharo. Yes, I did this screencast just recently, but: there were installation issues then. They've been fixed since, so I didn't want that one hanging out there as "authoritative". If you have trouble viewing it here in the browser, you can also navigate directly to YouTube. To watch now, click on the image below:

If you have trouble viewing that directly, you can click here to download the video directly. If you need the video in a Windows Media format, then download that here.

You can also watch it on YouTube:

Technorati Tags: smalltalk, pharo, glorp

Today's Javascript 4 You looks at the context() function in JQuery. If you have trouble viewing it here in the browser, you can also navigate directly to YouTube. Join the Facebook Group to discuss the tutorials. You can view the archives here.

To watch now, click on the image below:

If you have trouble viewing that directly, you can click here to download the video directly. If you need the video in a Windows Media format, then download that here.

You can also watch it on YouTube:

Technorati Tags: javascript, jquery, tutorial

Today's Smalltalk 4 You starts making use of of the Glorp code we wrote here. If you have trouble viewing it here in the browser, you can also navigate directly to YouTube. To watch now, click on the image below:

.

If you have trouble viewing that directly, you can click here to download the video directly. If you need the video in a Windows Media format, then download that here.

You can also watch it on YouTube:

Today we'll start using our basic Glorp setup to insert and query data from Oracle. To start out, we need to login and get a session (this uses code we created in the last screencast).

login := Login new
database: OracleODBCPlatform new;
username: username;
password: password;
connectString: 'orcl11g';
yourself.

"login and logout"
accessor := DatabaseAccessor forLogin: login.
accessor login.

"create a session"
session := GlorpSession new.
session system: (EmpSystem forPlatform: login database).
session accessor: accessor.

Now we can create an instance and have it inserted into the database. In the code below, ou would normally use #register: - I used #registerAsNew: to ensure that Glorp would treat my object as a new one bound of the database:

"Now insert one"
emp := Emp new.
emp firstName: 'Fred'.
emp lastName: 'Flintstone'.

"insert"
session beginUnitOfWork.
session registerAsNew: emp.
session commitUnitOfWork.

Note the beginning and ending of the transaction. Now, let's use a query to get the data back:

"login"
accessor := DatabaseAccessor forLogin: login.
accessor login.

"query"
emps := session readManyOf: Emp.

It's worth looking at class GlorpSession for the full API range of what you can do; we'll be exploring some of that in future screencasts. Below are two images - a screencap of the inspector on the queried data, and a sqlplus wind showing the same thing:

Need more help? There's a screencast for other topics like this which you may want to watch. Questions? Try the "Chat with James" Google gadget over in the sidebar.

Technorati Tags: smalltalk, va smalltalk, glorp

Welcome to episode 5 of "Thu'umcast" - a podcast where Michael Lucas-Smith, Scott Dirk, Austin Haley, Makahlua and I document our trials and tribulations in Elder Scrolls V: Skyrim Today we were joined by Madjinn, who has logged an impressive number of hours in the game (averaging 10 per day since it was released :) ). We talked about some of the more glaring quest glitches (including the nasty one for Jagged Crown/Season Unending). We also talked about monster leveling, followers, and how we've been playing our characters. If you liked our work on That Podcast, you'll probably like this. We intend to stay with the same idea - a gameplay podcast. If you don't want spoilers, don't listen - we are going to be talking about how we play the game, and what we ran across as we played.

You can subscribe in iTunes (or any podcatcher) using this feed, or this one for the AAC edition. We'll add the iTunes specific links as soon as they are available. In the meantime, join the Facebook Group and follow us on Twitter. If you play on Steam, join the Steam Group. Like the music? Pay Sbeast a visit, we thank him for letting us use it!

Links to all episodes and other information can be found on the Thu'umcast page

If you want to download the podcast directly, we've provided it in three formats:

• MP3 Edition
• AAC Edition
• Ogg Vorbis Edition

Got feedback? Tweet us!. Enjoy the podcast, and we'll see you in Skyrim!

Technorati Tags: skyrim, elder scrolls

Welcome to episode 5 of "Thu'umcast" - a podcast where Michael Lucas-Smith, Scott Dirk, Austin Haley, Makahlua and I document our trials and tribulations in Elder Scrolls V: Skyrim Today we were joined by Madjinn, who has logged an impressive number of hours in the game (averaging 10 per day since it was released :) ). We talked about some of the more glaring quest glitches (including the nasty one for Jagged Crown/Season Unending). We also talked about monster leveling, followers, and how we've been playing our characters. If you liked our work on That Podcast, you'll probably like this. We intend to stay with the same idea - a gameplay podcast. If you don't want spoilers, don't listen - we are going to be talking about how we play the game, and what we ran across as we played.

You can subscribe in iTunes (or any podcatcher) using this feed, or this one for the AAC edition. We'll add the iTunes specific links as soon as they are available. In the meantime, join the Facebook Group and follow us on Twitter. If you play on Steam, join the Steam Group. Like the music? Pay Sbeast a visit, we thank him for letting us use it!

Links to all episodes and other information can be found on the Thu'umcast page

If you want to download the podcast directly, we've provided it in three formats:

• MP3 Edition
• AAC Edition
• Ogg Vorbis Edition

Got feedback? Tweet us!. Enjoy the podcast, and we'll see you in Skyrim!

Technorati Tags: skyrim, elder scrolls

It's Thanksgiving, so no screencast today or tomorrow - check the archives for now, and new casts will return next week!

No podcast this weekend - too busy with the holiday and birthdays (the entire family has them this month, 2 right around Thanksgiving). We'll be back next week though, so stay tuned :)

Fuel is now available for Squeak.

Technorati Tags: fuel, squeak

Today's Smalltalk 4 You starts executing a few queries against the Emp table we created and mapped here. If you have trouble viewing it here in the browser, you can also navigate directly to YouTube. To watch now, click on the image below:

.

If you have trouble viewing that directly, you can click here to download the video directly. If you need the video in a Windows Media format, then download that here.

You can also watch it on YouTube:

Today we'll execute some queries against Oracle using the descriptor we set up - see this video for details on that. First off, we inserted some data so that there would be something to query for:

"create a few more"
listOfEmps := OrderedCollection new.
1 to: 10 do: [:index | | newEmp |
	newEmp := Emp new.
	newEmp firstName: 'Wilma', index printString.
	newEmp lastName: 'Flintstone', index printString.
	listOfEmps add: newEmp
]

"insert them"
session beginUnitOfWork.
listOfEmps do: [:each | session registerAsNew: each].
session commitUnitOfWork.

Now we can execute a few queries. It's worth taking a look at class GlorpSession to get an idea as to the API that's being used here. First, the simplest query - you can #read: any class that's been described in a descriptor:

"query"
emps := session read: Emp.
emps := session readManyOf: Emp.

Those two queries do the same thing - you should see this if you inspect the results:

You can also include a where clause, but bear in mind the restrictions - in general, you are limited to code that:

• accesses instance variables
• compares instance variables using #=, #<, #>, #<>, #isNIL, #notNIL
• Uses expressions in class ObjectExpression

Note that we use isNIL and notNIL rather than isNil and notNil; Glorp knows how to parse those and create valid SQL (which is what the where block becomes). Here are a few examples:

"where clauses"
session readOneOf: Emp where: [:each | each firstName = 'Fred'].
session readManyOf: Emp where: [:each | each firstName = 'Fred'].
session readManyOf: Emp where: [:each | each firstName = 'Barney'].
session readManyOf: Emp where: [:each | each firstName notNIL].
session readManyOf: Emp where: [:each | each firstName like: 'Wilma%'].

Note the use of #like:, which generates a SQL like statement. Use % rather than * for wildcarding, just as you would with SQL. For that last query, you should see the following results:

That wraps it up for now - we'll look at removing data next time

Need more help? There's a screencast for other topics like this which you may want to watch. Questions? Try the "Chat with James" Google gadget over in the sidebar.

Technorati Tags: smalltalk, va smalltalk, glorp, query