How Can I Efficiently Iterate Over Multiple Containers Simultaneously in C 11?

Efficiently Iterating Over Multiple Containers Simultaneously

In C 11, various methods exist for traversing collections. However, challenges arise when iterating over containers of equal size concurrently.

Addressing this issue, the recommended approach involves iterating over indices instead of using a traditional for loop:

for (unsigned i : indices(containerA)) {
    containerA[i] = containerB[i];
}

The indices function produces a range for the indices, enabling efficient iteration. For detailed implementation, refer to GitHub.

This method offers comparable performance to manual for loops while providing a more concise and elegant solution.

Alternatively, you can employ the zip function, which generates a range of tuples representing pairs from both containers:

for (auto& [a, b] : zip(containerA, containerB)) {
    a = b;
}

In case you require this pattern frequently, consider adopting this approach or customizing the indices and zip functions to suit your specific requirements.

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