Copying Maps: Custom Loop or Idiomatic Shortcut?

Copying Map Elements: Idiomatic Approach or Custom Loop?

When working with maps, it's often necessary to copy all elements from one map to another. While a custom loop is a commonly used method, it may leave you wondering if there's a more efficient or idiomatic way.

In this case, the given loop:

for k, v := range src {
    dst[k] = v
}

manually iterates over the source map, copying each key-value pair to the destination map. However, the question remains: is this the most idiomatic approach?

The answer, according to the provided source, is no. The expert suggests that the custom loop is perfectly adequate for this task. Copying one map into another is not a common enough operation to warrant a one-liner solution.

Therefore, when faced with the need to copy elements between maps, it's recommended to opt for the clear and direct approach of using a custom loop as demonstrated.

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