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dev_junior40
·
How to iterate over a HashMap, printing key/value, and remove elements in Rust?
Hello everyone! I'm new to Rust and trying to solve a simple problem: I have a `HashMap`, and I want to iterate over all its elements, print the key-value pairs, and then remove some of them based on a condition (e.g., all where the value is less than 10). The problem is that the borrow checker won't let me do this.
Here's my code that doesn't compile:
```rust
use std::collections::HashMap;
fn main() {
let mut map = HashMap::new();
map.insert("apple".to_string(), 5);
map.insert("banana".to_string(), 15);
map.insert("cherry".to_string(), 3);
for (key, value) in &map {
println!("{}: {}", key, value);
if *value < 10 {
map.remove(key); // Error!
}
}
}
```
The compiler gives an error: `cannot borrow 'map`
