Learn how to write a simple request parser that passes your initial unit test, using pattern matching on arrays and date/time parsing.
- [Instructor] But of course we haven't got a parse function…so we're going to go ahead and make that.…Parse, let Parse, we might as well call the parameter,…text, so text is a string.…And what's that going to return?…Well it needs to return an instance or query.…So let's just do a failing test…by returning some trivial stuff from there.…So once again, I'm going to copy that code there…and just return empty strings just so we've got a compiling…but failing test.…
DateTime.MinValue is quite a good one to use…for failing tests.…Oh and we've got a failing test here.…By the way, you'll sometimes find that visual studio's…editor compilation lags somewhat.…So although we're getting a syntax error there…or an error there because it's saying value…or constructor parse is not allowed,…we know this code is compilable…because n crunch compiled it and ran the test…so you can safely just ignore that.…What's the error?…Well, you'd expect an error wouldn't you…because we aren't actually parsing the data.…
Let's have a look.…Here.…
- Defining values and calling functions in F#
- Defining and identifying discriminated unions
- Working with if-else expressions
- Writing unit test
- Using type providers to access data
- Analyzing data with collection functions
- Plotting data using the R type provider
- Using railway-oriented programming to handle errors
- Integrating with Twitter
- Deploying an F# application to Azure
Skill Level Intermediate
Visual Studio Essential Training: 05 Code Editorswith Walt Ritscher3h 25m Intermediate
1. Get Started with F#
2. Build a Simple Parser with Unit Testing
3. Use F# CSV Type Provider to Get Data
4. Analyze Data with F# Collection Functions
5. Use RStats Provider and ggplot2 to Plot Data
6. Use BoxKite with Twitter
7. Deploy a Working Bot
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