Learn how to integrate all the functions you have written so far into a single reply function. Use the railway-oriented programming style to simplify error handling.
- [Instructor] We're just about on the last lap.…It's time to bring all the functions we wrote earlier…into a bot that actually works.…To do that, I'm going to add some references,…basically to all the useful projects we created earlier.…We don't need the tests,…we don't need the visualization harness.…And I'm also going to use Manage NuGet Packages…for solution…to make sure that BoxKite.Twitter…is installed into StockChartBot.…
And then in the main program file,…of StockChartBot, I'm going to paste some code,…which is going to look pretty scary.…Starts well.…This is going to be a reply function,…and this is going to be the function…that calls everything else we need to call.…In other words, it's when we start the embodiment…of that type signature we wrote at the very beginning.…This is the thing that's going from a tweet to a query,…from a query to data, from data to a summary in a chart,…and from summary in a chart to a tweet.…
So it starts well.…We just have a little logic here just to make sure…that the bot doesn't reply to tweets of its own.…
Author
Released
12/20/2016- 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
Duration
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Introduction
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Welcome59s
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Exercise files41s
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1. Get Started with F#
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Record type and arrays2m 35s
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Forward piping3m 39s
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Array mapping and iteration6m 22s
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If-else expressions2m 9s
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Exception handling2m 40s
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Option types5m 9s
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The bot and type signatures4m 19s
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2. Build a Simple Parser with Unit Testing
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Install NUnit4m 23s
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Write a real test4m 31s
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Write a parser5m 8s
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Refactor tests5m 18s
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Test unhappy paths4m 1s
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Challenge35s
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Solution3m 38s
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3. Use F# CSV Type Provider to Get Data
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Recap and code tidy-up1m 51s
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Introducing Quandl1m 52s
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Challenge1m 14s
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Solution9m 34s
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4. Analyze Data with F# Collection Functions
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5. Use RStats Provider and ggplot2 to Plot Data
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RStats and ggplot21m 38s
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Develop the chart generator5m 45s
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Challenge38s
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Solution2m 21s
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6. Use BoxKite with Twitter
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Create a Twitter application5m 24s
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React to directed tweets4m 47s
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7. Deploy a Working Bot
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Call the reply function1m 17s
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Try the bot running locally1m 53s
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Understanding ROP2m 37s
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Conclusion
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Next steps1m 46s
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Video: Assemble functions into a reply function