本文介绍了是否有等效于JavaScript的Rust数组的indexOf?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
var fruits = ["Banana", "Orange", "Apple", "Mango"];
var index = fruits.indexOf("Apple");
let fruits = ["Banana", "Orange", "Apple", "Mango"];
let index = fruits.???
如果没有等效项,也许您可以指出正确的方向?我发现了这个,但是它是用于向量的,而不是用于数组的。
If there is no equivalent, maybe you can point me in the right direction? I found this example, but it's for vectors, not arrays.
推荐答案
您可以使用方法在任何迭代器上。您可以使用方法。像这样尝试:
You can use the method position
on any iterator. You can get an iterator over an array with the iter()
method. Try it like this:
let fruits = ["Banana", "Orange", "Apple", "Mango"];
let res1 = fruits.iter().position(|&s| s == "Apple");
let res2 = fruits.iter().position(|&s| s == "Peter");
println!("{:?}", res1); // outputs: Some(2)
println!("{:?}", res2); // outputs: None
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