In this article I will model a lock on a river or canal. As well as going into the specifics of the model, I’ll touch on more general topics about modelling. These are things like diagrams to represent the model, tools, models as conversation starters, iterating models etc. A lock has a model that is … Continue reading Modelling a river lock
Category: Computer theory
Computer science while doing the laundry 2: Bin sort
This is part of a short series of articles about computer science while doing the laundry: Merge sortBin sort In the previous article I used doing a lot of laundry to illustrate merge sort, which is probably an impractical way of doing the laundry. In this article I will suggest a way that might actually … Continue reading Computer science while doing the laundry 2: Bin sort
Computer science while doing the laundry 1: Merge sort
This is part of a short series of computer science involving laundry: Merge sortBin sort In this article I will explain merge sort, which is a way of sorting things when there are so many of them it’s awkward or impossible to use other approaches. I’ll use doing the laundry as a way of explaining … Continue reading Computer science while doing the laundry 1: Merge sort
Connecting Azure Data Factory code to an external database table
In this article I will talk about how to connect Azure Data Factory (ADF) to a database table. This can be surprisingly complex, so I will start with the simplest version and work towards more complex versions. I won't go into connecting ADF to other types of data store such as APIs, blob storage etc, … Continue reading Connecting Azure Data Factory code to an external database table
An introduction to parameterised types
This article is about parameterised types, which are also known as generics or parametric polymorphism. I first came across them in the functional programming language ML, but they have spread beyond the functional programming world, to languages like Java, C#, and TypeScript. Parameterised types let you define a family of similar but different types What … Continue reading An introduction to parameterised types
Encapsulation
This is the second of the things requested by Jesper. To me, the software engineering term encapsulation is part of the bigger term modularisation. Modularisation is chopping a big lump of code into smaller parts or modules. It’s important to get the boundaries between parts in the right place. Once there are modules, they can … Continue reading Encapsulation
Modularisation – cohesion at many levels
This article builds on the previous article, so if you are new to the terms coupling and cohesion as they apply to software, please look at that first. In this article I’m going to look at cohesion as it applies to methods (or functions, if that’s what you call such things). Specifically, I’m going to … Continue reading Modularisation – cohesion at many levels
Modularisation – coupling and cohesion
This is related to the second of the things requested by Jesper, which was encapsulation. Encapsulation is a tool to use when designing software. It’s a bit abstract, and I don’t think people always agree on what it means. To me, encapsulation is part of the bigger term modularisation, which doesn’t immediately help because it’s … Continue reading Modularisation – coupling and cohesion
Exceptions 4: Finishing up
This is the last article in a series about exceptions: BasicsTypes and filteringWhere to put catch blocks and handle exceptionsFinishing up Exceptions are an example of the Chain of Responsibility pattern.Image credit Finally If the code in the try block needs tidying up (e.g. it opens files, that will need closing at some point), then … Continue reading Exceptions 4: Finishing up
Exceptions 3: Where to put catch blocks and handle exceptions
This is the third article in a series about exceptions: BasicsTypes and filteringWhere to put catch blocks and handle exceptionsFinishing up Where your catch blocks are and where exceptions are dealt with matters - probably best to avoid sticking a pin into your code randomly to choose the spot.Image credit The location of catch blocks … Continue reading Exceptions 3: Where to put catch blocks and handle exceptions
Random Tech Thoughts 