How Can I Deep-Copy a Map While Preserving its Supermap Reference?

Deep-Copying Maps

Copying map contents can be a challenge, especially when you want to clear the original map for subsequent iterations. Typically, clearing the original map also clears its reference in the supermap.

To deep-copy a map, follow this process:

1. Create a new map to store the copied values.
2. Iterate over the original map.
3. For each key-value pair in the original map, create a copy in the new map.

Here's an example:

for k, v := range originalMap {
  newMap[k] = v
}

Once you have copied the contents, you can now clear the original map without affecting the supermap's reference to the new map.

Addressing the Pseudo-Code Example

Your pseudo-code attempts to copy the contents of aMap into aSuperMap while clearing aMap. However, it falters because it relies on delete(aMap, x), which modifies both the original and supermap.

To resolve this, you can:

1. Create a new map within the loop, and assign it to aSuperMap[y].
2. Copy the contents of aMap into the new map.
3. Clear aMap.

By following these steps, you can deep-copy a map without losing its reference in the supermap or introducing duplicate data.

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