Safest Ways to Iterate Through Perl Hash Keys

When working with Perl hashes, choosing the right way to iterate through keys is essential for avoiding unexpected behavior and ensuring efficient memory usage. Here are the most common methods, their advantages, and the potential pitfalls associated with each.

Iterating with each

The each function retrieves one key-value pair at a time. This is memory-efficient and works well for large hashes or tied hashes.

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