Iterator Chain

Chain multiple iterator operations together.

Difficulty

Intermediate

Code

fn main() {
    let words = vec!["hello", "world", "rust", "is", "awesome"];

    let result: String = words.iter()
        .filter(|w| w.len() > 3)
        .map(|w| w.to_uppercase())
        .collect::<Vec<_>>()
        .join(", ");
    println!("{}", result);

    // fold for aggregation
    let sum: i32 = (1..=100).fold(0, |acc, x| acc + x);
    println!("sum 1..100 = {}", sum);
}

Explanation

Chain operations for data processing pipelines.

Key Concepts

• Read the code carefully and understand the data flow
• Try modifying the example to see how it changes behavior
• Run this code in the Rust Playground

Related Topics

Browse more examples in the iterators category to build a complete understanding of this topic.