Difference between revisions of "Intermediate C++ Game Programming Tutorial 16"
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* Sorting a (forward) list <code>std::list</code>, using its member function <code>std::list::sort()</code> [https://youtu.be/3J1Pz30IE4Q?t=2m16s 2:16] | * Sorting a (forward) list <code>std::list</code>, using its member function <code>std::list::sort()</code> [https://youtu.be/3J1Pz30IE4Q?t=2m16s 2:16] | ||
* Introducing Concepts / named requirements of types (e.g., the <code>Compare</code> requirement of <code>std::sort</code> [https://youtu.be/3J1Pz30IE4Q?t=2m54s 2:54] | * Introducing Concepts / named requirements of types (e.g., the <code>Compare</code> requirement of <code>std::sort</code> [https://youtu.be/3J1Pz30IE4Q?t=2m54s 2:54] | ||
− | * Modyfing sorting order by passing a comparison function object (functor), like so (vec is a vector of ints):<br /><code>std::sort(vec.begin(),vec.end(),std::greater<int>{});</code> [https://youtu.be/3J1Pz30IE4Q?t=3m17s 3:17] | + | * Modyfing sorting order by passing a comparison function object (functor) as a predicate, like so (vec is a vector of ints):<br /><code>std::sort(vec.begin(),vec.end(),std::greater<int>{});</code> [https://youtu.be/3J1Pz30IE4Q?t=3m17s 3:17] |
* Sort custom types, example code for sorting a custom class object [https://youtu.be/3J1Pz30IE4Q?t=4m07s 4:07] | * Sort custom types, example code for sorting a custom class object [https://youtu.be/3J1Pz30IE4Q?t=4m07s 4:07] | ||
* [WORK-IN-PROGRESS] | * [WORK-IN-PROGRESS] |
Revision as of 21:53, 28 September 2019
In the video we take a look at a couple of bangers from <algorithm>
, and we learn what lambda functions are and how to use them.
Contents
Topics Covered
- Algorithms
std::sort
andstd::remove_if
- Concepts (as in, type concepts like Comparable)
-
<functional>
functors as predicates - Lambda functions
Errata
In the video Chili states that std::remove does not preserve the relative order of elements in the container, but this is fake news! Relative order is preserved: [1]
Video Timestamp Index
- Generic Algorithms: how Templates and Iterators make Algorithms independent of Data Types and Containers 0:17
- The
std::sort
algorithm and its requirements 0:43 - Sorting a (forward) list
std::list
, using its member functionstd::list::sort()
2:16 - Introducing Concepts / named requirements of types (e.g., the
Compare
requirement ofstd::sort
2:54 - Modyfing sorting order by passing a comparison function object (functor) as a predicate, like so (vec is a vector of ints):
std::sort(vec.begin(),vec.end(),std::greater<int>{});
3:17 - Sort custom types, example code for sorting a custom class object 4:07
- [WORK-IN-PROGRESS]
Homework
Solve the problems in Source.cpp attached below using the <algorithm> library and other parts of the standard library as extensively as possible. As a bonus problem, implement the sprite drawing effect shown at the end of the video using a lambda function.
Related Series
For an in-depth look into the <algorithm> library and beyond, check out STD Gems.