Learn how the STL logical functors provide Boolean logical operators for transform and other functions that require operator functions.
- [Instructor] The logical operator functors,…or standard template functors,…defined in the functional header of the STL.…And there's the functional header there.…Here I have a working copy of logical.cpp…from chapter five of the exercise files.…The transformation function down here is the binary version,…and I have three vectors of ints.…And of course these can be any logical, compatible type,…so any scaler value.…
They could just easily be bool.…If we build and run this,…you see that the results are in ones and zeroes.…If I change all these to bool, it works exactly the same.…And build and run.…The logical and does what you'd expect it to do.…In each of the positions…where both of these values are true,…the result will be true.…The logical or.…
We'll run that.…That is true where you have a one in either place.…And the logical not is actually a unary function.…So I can take this out…and when I build and run,…it gives you the inverse of our V1 vector.…These logical operators are often useful…for simple transformations and other applications…
Author
Released
12/20/2018- Template fundamentals
- STL containers
- Accessing iterators
- Output, forward, and bidirectional iterators
- The transform function
- Transforming strings and types
- Arithmetic, relational, and logical functions
- STL algorithms
Skill Level Intermediate
Duration
Views
Related Courses
-
Learning C++ Pointers
with Peggy Fisher53m 55s Intermediate -
Learning C++
with Erin Colvin2h 26m Beginner
-
Introduction
-
1. Templates
-
What is a template?4m 43s
-
Template syntax1m 48s
-
Template specialization1m 49s
-
Template variables4m 14s
-
Impact on header files3m 13s
-
Type inference6m 45s
-
Argument deduction3m 15s
-
-
2. STL Containers
-
3. STL Iterators
-
Accessing iterators2m 28s
-
Input iterators2m 2s
-
Output iterators1m 27s
-
Forward iterators1m 58s
-
Bidirectional iterators1m 59s
-
Random access iterators2m 2s
-
-
4. Transformations
-
The transform function5m 28s
-
Lambda transformations4m 23s
-
Transforming strings2m 49s
-
Binary transformations3m 7s
-
Transforming types3m 3s
-
-
5. STL Functions
-
About functors1m 46s
-
Arithmetic functors2m 10s
-
Relational functors3m 13s
-
Logical functors1m 31s
-
-
6. STL Algorithm
-
About STL algorithms1m 42s
-
Testing conditions2m 36s
-
Searching and counting4m 38s
-
Replacing and removing4m 14s
-
Modifying algorithms5m 46s
-
Partitions2m 52s
-
Sorting3m 42s
-
Merging sequences2m 4s
-
Binary searches3m 57s
-
-
Conclusion
-
Goodbye1m 29s
-
- Mark as unwatched
- Mark all as unwatched
Are you sure you want to mark all the videos in this course as unwatched?
This will not affect your course history, your reports, or your certificates of completion for this course.
CancelTake notes with your new membership!
Type in the entry box, then click Enter to save your note.
1:30Press on any video thumbnail to jump immediately to the timecode shown.
Notes are saved with you account but can also be exported as plain text, MS Word, PDF, Google Doc, or Evernote.
Share this video
Embed this video
Video: Logical functors