Passing Variable Parameters to Sprintf in Go
The Printf function in Go allows for formatting and printing output using a specified format string, followed by a variable number of parameters. However, if you wish to pass an array or slice of values as parameters, you may encounter type errors.
Consider the following example:
<code class="go">s := []string{"a", "b", "c", "d"} // Result from regexp.FindStringSubmatch() fmt.Printf("%5s %4s %3s\n", s[1], s[2], s[3])</code>
Running this code yields the error:
cannot use v (type []string) as type []interface {} in argument to fmt.Printf
To resolve this, you must declare your slice as a type []interface{}. This is because Printf expects parameters of that type.
s := []interface{}{"a", "b", "c", "d"} fmt.Printf("%5s %4s %3s\n", s[1], s[2], s[3])
Another option is to manually convert your []string to []interface{} before passing it to Printf.
<code class="go">ss := []string{"a", "b", "c"} is := make([]interface{}, len(ss)) for i, v := range ss { is[i] = v }</code>
Using this approach allows you to pass the is slice as a variable parameter to Printf.
The above is the detailed content of How to Pass Array or Slice Parameters to Sprintf in Go?. For more information, please follow other related articles on the PHP Chinese website!

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