Learn about the iterator, a template class that acts a lot like a pointer and is used to access elements of a container.
- [Instructor] An iterator is an STL object…that can iterate through the elements of a container.…An iterator acts a lot like a pointer.…It can be incremented and de-referenced…as if it were a pointer.…Here I have a working copy of iterator.cpp…from chapter three of the exercise files.…I've defined a vector of ints and I've defined…an iterator it1.…The iterator class is defined in the scope…of the container class.…So, it's accessed using the scope resolution operator…or the double colons that we've seen elsewhere.…
It's technically called a scope resolution operator.…And the type of iterator is bound to the type of the class.…And so in this case we have a vector int iterator.…So, this type of iterator will only work…with a vector of ints.…It won't work with any other class or templated class.…Begin and end iterators are generally available…from the begin and end member functions.…And so in this case, I've taken an iterator…for the begin position and an iterator for the end position.…
They're exactly the same type as you can see here…
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
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Introduction
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1. Templates
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What is a template?4m 43s
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Template syntax1m 48s
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Template specialization1m 49s
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Template variables4m 14s
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Impact on header files3m 13s
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Type inference6m 45s
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Argument deduction3m 15s
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2. STL Containers
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3. STL Iterators
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Accessing iterators2m 28s
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Input iterators2m 2s
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Output iterators1m 27s
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Forward iterators1m 58s
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Bidirectional iterators1m 59s
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Random access iterators2m 2s
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4. Transformations
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The transform function5m 28s
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Lambda transformations4m 23s
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Transforming strings2m 49s
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Binary transformations3m 7s
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Transforming types3m 3s
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5. STL Functions
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About functors1m 46s
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Arithmetic functors2m 10s
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Relational functors3m 13s
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Logical functors1m 31s
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6. STL Algorithm
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About STL algorithms1m 42s
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Testing conditions2m 36s
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Searching and counting4m 38s
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Replacing and removing4m 14s
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Modifying algorithms5m 46s
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Partitions2m 52s
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Sorting3m 42s
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Merging sequences2m 4s
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Binary searches3m 57s
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Conclusion
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Goodbye1m 29s
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Video: Accessing iterators