Manage episode 239281895 series 27319
We continue our dive into The Pragmatic Programmer and debate when is it text manipulation vs code generation as Joe can’t read his bill, Michael makes a painful recommendation, and Allen’s gaming lives up to Southern expectations.
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- Programmers manipulate text the same way woodworkers shape wood.
- Text manipulation tools are like routers: noisy, messy, brutish.
- You can use text manipulation tools to trim the data into shape.
- Once you master them, they can provide an impressive amount of finesse.
- Alternative is to build a more polished tool, check it in, test it, etc.
- Learn a Text Manipulation Language.
- When you have a repetitive task, why not generate it?
- The generated code takes away complexity and reduces errors.
- And it’s reuse has little to no additional cost.
- Write Code That Writes Code.
There are two types of code generators:
- Passive code generators are run once (scaffolding).
- Active code generators are used each time they are required.
- New files from a template, i.e. the “File -> New” experience.
- One off conversions (one language to another).
- These don’t need to be completely perfect.
- Producing lookup tables and other resources that are expensive to compute.
- Full-fledged source file.
You get to pick how accurate you want the generators to be. Maybe it writes 80% of the code for you and you do the rest by hand.Active code generators
- Active code generators are necessary if you want to adhere to the DRY principle.
- This form is not considered duplication because it’s generated as needed by taking a single representation and converting it to all of the forms you need.
- Great for system boundaries (think databases or web services).
- Great for keeping things in sync.
- Recommend creating your own parser.
- Scaffolding, so it’s a starting off point that you edit.
- System boundaries.
- Some uses work best when built into your build pipeline.
- Think about automatically generating code to match your DB at compile time, like a T4 generator for Entity Framework.
- It’s often easier to express the code to be generated in a language neutral representation so that it can be output in multiple languages.
- Something like System.CodeDom comes to mind.
- These generators don’t need to be complex.
- And the output doesn’t always need to be code. It could be XML, JSON, etc.
- The Pragmatic Programmer by Andrew Hunt, David Thomas (Amazon)
- The Pragmatic Bookshelf (pragprog.com)
- C# and .NET Core scripting with the “dotnet-script” global tool (hanselman.com)
- Using the CodeDOM (docs.microsoft.com)
- Johnny Dangerously (1984) (IMDb)
- Within Visual Studio Code, after you use CTRL+F to find some text in your current document, you can take it a step further by pressing ALT+ENTER to enter into block selection/edit mode.
- Turn learning Vi into a game with VIM Adventures. (vim-adventures.com)
- Never confuse forward Slash with back Slash again.