字符串向量上的连接运算符的等价物是什么? [英] What is the equivalent of the join operator over a vector of Strings?

问题描述

我无法在 String 向量上找到join"运算符的 Rust 等效项.我有一个 Vec，我想将它们作为一个 String 加入:

I wasn't able to find the Rust equivalent for the "join" operator over a vector of Strings. I have a Vec<String> and I'd like to join them as a single String:

let string_list = vec!["Foo".to_string(),"Bar".to_string()];
let joined = something::join(string_list,"-");
assert_eq!("Foo-Bar", joined);

相关:

• 什么是惯用语如何在 Rust 中打印由空格分隔的迭代器?

推荐答案

在 Rust 1.3.0 及更高版本中，join 可用:

In Rust 1.3.0 and later, join is available:

fn main() {
    let string_list = vec!["Foo".to_string(),"Bar".to_string()];
    let joined = string_list.join("-");
    assert_eq!("Foo-Bar", joined);
}

在 1.3.0 之前这个方法被称为 connect:

Before 1.3.0 this method was called connect:

let joined = string_list.connect("-");

请注意，您不需要导入任何内容，因为这些方法是由 标准库前奏.

Note that you do not need to import anything since the methods are automatically imported by the standard library prelude.

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