如何在Rust中从特定索引开始的子字符串中查找? [英] How to find in a substring starting at a specific index in Rust?

问题描述

Rust的标准库中是否有一个 find 函数，该函数从字符串中的给定索引开始搜索子字符串?就像 indexOf 在JavaScript中.

Is there a find function in Rust's standard library which searches for a substring starting at a given index in the string? Just like indexOf in JavaScript.

推荐答案

您将使用

You would use str::find on a substr and then add the offset back:

let s = "foobarfoo";
let index: Option<usize> = s[4..].find("foo").map(|i| i + 4);
println!("{:?}", index);

Some(6)

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