iterator Archives - Page 2 of 4

Why use iterators instead of array indices?

Take the following two lines of code: for (int i = 0; i < some_vector.size(); i++) { //do stuff } And this: for ...

May 20, 2022
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How to correctly implement custom iterators and const_iterators?

I have a custom container class for which I’d like to write the iterator and const_iterator classes. I never did this before and ...

May 18, 2022
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How to pick just one item from a generator?

I have a generator function like the following: def myfunct(): ... yield result The usual way to call this function would be: for ...

May 18, 2022
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How to implement an STL-style iterator and avoid common pitfalls?

I made a collection for which I want to provide an STL-style, random-access iterator. I was searching around for an example implementation of ...

May 12, 2022
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Sorting a vector in descending order

Should I use std::sort(numbers.begin(), numbers.end(), std::greater<int>()); or std::sort(numbers.rbegin(), numbers.rend()); // note: reverse iterators to sort a vector in descending order? Are there any ...

May 11, 2022
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How to avoid “ConcurrentModificationException” while removing elements from `ArrayList` while iterating it? [duplicate]

This question already has answers here: Iterating through a Collection, avoiding ConcurrentModificationException when removing objects in a loop (30 answers) Closed 7 years ...

May 9, 2022
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Get the first item from an iterable that matches a condition

I would like to get the first item from a list matching a condition. It’s important that the resulting method not process the ...

May 5, 2022
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What is the most effective way to get the index of an iterator of an std::vector?

I’m iterating over a vector and need the index the iterator is currently pointing at. AFAIK this can be done in two ways: ...

May 3, 2022
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