- [Instructor] Let's do another lambda example.…This time we'll create a special function,…which we'll call Incrementer.…So we'll come up here, above the main.…We'll do auto space incrementer.…And we will set this equal to lambda.…And this time the lambda's not going to take…any parameters.…And then on the inside we'll say auto increment equal zero.…Then what this function returns is another lambda.…
And then we want to capture increment,…and once again we take no values,…and now we need to use a special keyword…which is called mutable.…Any time you want to modify a value…that's in the closure, you have to say mutable…in order to be able to change it.…And what we're going to do is we're going to say return…increment plus plus.…And then a semicolon.…And we need semicolons here, and here.…
So we have our little function called incrementer,…it is going to start off at zero,…and every time you call it, it's going to increase…its value by one.…And so let's comment this code back in.…Here we call increment the first time,…
Author
Released
12/11/2018- Unit testing and functional programming
- Binding
- Function and Lambda functions
- C++ templates
- Working with the Standard Template Library and Boost.Hana
- Functional reactive programming
Skill Level Intermediate
Duration
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Introduction
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1. Overview
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2. Functional Programming in Modern C++
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Enabling C++ 174m 24s
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transform instead of map5m 30s
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copy_if instead of filter2m 59s
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accumulate instead of reduce2m 51s
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bind4m 56s
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Functions6m 54s
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Lambda functions: Curry3m 38s
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Lambda functions: Closures2m 20s
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3. Template Metaprogramming
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C++ templates4m 36s
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Factorial5m 23s
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Boost.Hana5m 31s
-
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4. Functional Reactive Programming
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RxCpp library5m 21s
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Conclusion
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Next steps41s
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Video: Lambda functions: Closures