Chain iterators in Rust by calling adapter methods like filter and map sequentially on an iterator, finishing with a consumer method.
Chain iterators in Rust by calling iterator adapter methods directly on the result of the previous one, ending with a consumer method like collect or for_each.
let numbers = vec![1, 2, 3, 4, 5];
let doubled: Vec<i32> = numbers
.iter()
.filter(|&&x| x % 2 == 0)
.map(|&x| x * 2)
.collect();
Chaining iterators lets you process a list of items by string together multiple steps, like filtering and transforming, into a single readable line. It works like an assembly line where each step passes the result to the next one without creating temporary lists in between. You use this to clean up code that would otherwise require multiple loops or intermediate variables.