How to Convert a Slice of Anonymous Structs to a Slice of Non-Anonymous Structs in Go?

Type Conversion Between Slices of Structs in Go

Problem:

In an attempt to convert a slice of anonymous structs to a slice of non-anonymous structs, errors occur. This raises questions about the equivalence of structs with and without JSON tags and the compatibility of different slices.

Answer:

Differences Between Struct Types:

Structs with different JSON tags are considered different types because the tags affect the encoding and decoding of JSON data.

Conversion Options:

1. Copy Through Iteration:

This is the recommended method, but it is slower and more verbose. It involves copying each element of the anonymous struct slice into the non-anonymous struct slice.

<code class="go">ls := make(ListSociete, len(res))
for i := 0; i < len(res); i++ {
    ls[i].Name = res[i].Name
}
return ls, nil</code>

2. Unsafe Conversion:

This is an unsafe method that assumes the underlying data structure of both struct types is identical.

<code class="go">return *(*ListSociete)(unsafe.Pointer(&res)), nil</code>

Warning:

The unsafe conversion may result in unpredictable behavior and is not recommended for general use. Using it may lead to memory corruptions or other unexpected errors.

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