How to Iterate Over String Fields in a Struct Using Reflection?

Iterating Over String Fields in a Struct

In data manipulation scenarios, it often becomes necessary to iterate over the string fields of a struct for operations like cleanup or validation.

Using Reflection

For such tasks, reflection provides a valuable approach. Reflection allows us to inspect and modify the structure and values of objects at runtime.

Implementing the Iteration

To iterate over the string fields in a struct:

1. Get the Element Value: Acquire the reflect.Value of the struct. Note that pointers are needed for modifying values.
2. Iterate over Fields: Call NumFields() to determine the number of fields in the struct. Iterate over the fields using Field(i).
3. Check Field Type: Use Type() on the value to check if it's of type string.
4. Modify String: For string fields, extract the value using Interface(), trim it using strings.TrimSpace, and set it back using SetString.

Error Handling

If necessary, implement custom error handling by creating a slice of type error, e.g., type FormError []string, and add error messages as needed.

Example Code

Here's an example of the provided code with these concepts applied:

<code class="go">type Listing struct {</code>

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