Is there a way to initialize an empty slice?

问题

Something like this?

[String, 0]

Vec::new() is not an option.

回答1:

This creates an empty array:

let thing: [String; 0] = [];

You can also get a slice from the array:

let thing: &[String] = &[];

You can also use as:

some_function([] as [String; 0]);
some_function(&[] as &[String]);

来源：https://stackoverflow.com/questions/45533699/is-there-a-way-to-initialize-an-empty-slice