E0599 rust type_error ai_generated true

错误[E0599]:在当前作用域中,结构体`HashMap<String, i32>`没有名为`find`的方法

error[E0599]: no method named `find` found for struct `HashMap<String, i32>` in the current scope

ID: rust/e0599-no-method-named-find-for-struct-hashmap

其他格式: JSON · Markdown 中文 · English
90%修复率
88%置信度
1证据数
2023-07-01首次发现

版本兼容性

版本状态引入弃用备注
rustc 1.68.0 active
rustc 1.72.0 active
rustc 1.78.0 active

根因分析

调用了该类型不存在的方法,通常是由于将方法名与另一种类型混淆(例如,在HashMap上直接使用迭代器的`find`方法)。

English

Calling a method that doesn't exist on the type, often due to confusing the method name with another type (e.g., using `find` from iterators on a HashMap directly).

generic

官方文档

https://doc.rust-lang.org/error_codes/E0599.html

解决方案

  1. 在HashMap上调用`.iter()`获取迭代器,然后在迭代器上使用`.find()`。
  2. 使用`HashMap::get`或`HashMap::contains_key`进行基于键的查找,而不是使用`find`。

无效尝试

常见但无效的做法:

  1. 90% 失败

    HashMap itself doesn't implement Iterator; you need to call `.iter()` first.

  2. 80% 失败

    Dereferencing a HashMap doesn't give you an iterator; it gives you the inner type, which also doesn't have `find`.

  3. 95% 失败

    HashMap does not have a static `find` method; it's an iterator method.