How can I avoid memory reallocation in a variadic function wrapper?

Avoiding Memory Reallocation in Variadic Function Wrapper

To address the issue of avoiding extra memory allocation when appending items to a variadic function wrapper, consider using append as a concise solution. Here's an updated code snippet:

<code class="go">func Debug(a ...interface{}) {
    if debug {
        fmt.Fprintln(out, append([]interface{}{prefix, sep}, a...)...)
    }
}</code>

This approach utilizes the append function to create a new slice by appending the prefix and separator to the existing slice of interface values a. The ... syntax expands the slice into individual elements, effectively passing them to Fprintln.

By leveraging append, you not only eliminate the need for explicit loop iterations and manual memory allocation, but also ensure that the resulting slice only contains the necessary elements, avoiding unnecessary memory overhead. This approach maintains the functionality of the wrapper while optimizing its performance and memory usage.

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