Events

I published today's A-to-Z post a little late because I've had a lot going on this week, between the Apollo Chorus benefit tomorrow, rehearsals, and taking care of Parker. Yesterday Parker got his sutures out. The vet said he's healing very well, no signs of infection or re-injury, and good progress on using the injured leg. He can go without the Cone of Shame while someone is observing him, and on Friday, he can have it off permanently. Both he and I really, really, really want that to happen. They...

Posting day 17 of the Blogging A-to-Z challenge just a little late because of stuff (see next post). Apologies. Today's topic is querying, which .NET makes relatively easy through the magic of LINQ. Last week I showed how LINQ works when dealing with in-memory collections of things. In combination with Entity Framework, or another object-relational mapper (ORM), LINQ makes getting data out of your database a ton easier. When querying a database in a .NET application, you will generally need a database...

So far, this April ranks as the 2nd coldest in Chicago history. We had snow this past weekend, and we expect to have snow tonight—on April 18th. So it may come as a surprise to people who confuse "weather" and "climate" that, worldwide, things are pretty hot: The warm air to our north and east has blocked the cold air now parked over the midwestern U.S. Europe, meanwhile, feels like August. And Antarctica feels like...well, Antarctica, but unusually warm. Note that the temperature anomalies at the...

We're now past the half-way point, 16 days into the Blogging A-to-Z challenge. Time to go back to object-oriented design fundamentals. OO design has four basic concepts: Inheritance Encapsulation Abstraction Polymorphism All four have specific meanings. Today we'll just look at polymorphism (from Greek: "poly" meaning many and "morph" meaning shape). Essentially, polymorphism means using the same identifiers in different ways. Let's take a contrived but common example: animals. Imagine you have a class...

A couple stories of interest: CityLab has a good explanation about why New York stopped building subways 80 years ago, and how that has caused epic transit problems today. Developers plan to build a new skyscraper in Chicago for $1 bn. At 433 m, it would be the second-tallest building in Chicago, just 9 m shorter than Willis Tower. Credit-card signatures are finally going away in the U.S. OK, back to being really too busy to breathe this week...

For day 15 of the Blogging A-to-Z challenge I want to talk about something that computer scientists use but application developers typically don't. Longtime readers of the Daily Parker know that I put a lot of stock in having a liberal arts education in general, and having one in my profession in specific. I have a disclosed bias against hiring people with computer science (CS) degrees unless they come from universities with rigorous liberal arts core requirements. Distilled down to the essence, I...

Day 14 of the Blogging A-to-Z challenge brings us to namespaces. Simply put, a namespace puts logical scope around a group of types. In .NET and in other languages, types typically belong to namespaces two or three levels down. Look at the sample code for this series. You'll notice that all of the types have a scope around them something like this: namespace InnerDrive.Application.Module { } (In some languages it's customary to use the complete domain name of the organization creating the code as part...

Two weeks ago I started writing my A-to-Z posts and got all the way to today's before my life became nuts—as I knew it would—with 4 chorus-related events and a huge increase in my work responsibilities. And with the Apollo After Hours benefit this coming Friday, this weekend will be pretty full as well. I use my email inbox as a to-do list, and right now it has 35 messages, 30 of which relate to the benefit. I'm very glad the A-to-Z Challenge gives us Sundays off, because I don't know how I'm going to...

Alphabetical order doesn't actually put topics in the best sequence for learning, so we've had to wait until Day 13 of the Blogging A-to-Z challenge to talk about one of the most basic parts of an object-oriented program: methods. A method takes a message from an object and does something with it. It's the behavior part of the behavior-plus-data pairing that orients your objects in the OO universe. In .NET, even though you define fields, events, properties, and methods on your classes, under the hood...

Of 19 Trump-branded product lines available in 2015, only 2 remain on the market. One wonders why: In recent weeks, only two said they are still selling Trump-branded goods. One is a Panamanian company selling Trump bed linens and home goods. The other is a Turkish companyselling Trump furniture. Of the rest, some Trump partners quit in reaction to campaign-trail rhetoric on immigrants and Muslims. Others said their licensing agreements had expired. Others said nothing beyond confirming that they’d...