Think/Code

Day three of code refactoring... Trying to start to think this way

My original code:

let mut results: Vec<u32> = engine.search(&input); let total = results.len(); if total > 10 { results.drain(10..); } let mut top_ten: Vec<(u32, String)> = vec![]; for index in results { top_ten.push((index, catalog[index as usize].1.clone())) } let mut answer_vec: Vec<u32> = vec![]; for (i, _) in top_ten.iter() { answer_vec.push(*i) } 

After refactoring and explanations:

let answer_vec: Vec<u32> = engine .search(&input) .into_iter() .take(10) .collect(); 

Both do the same:
1) Send "input" to search function
2) Iterate through it's output
3) Take first 10 elements
4) Collect them into a vector
But look different.

It's important to catch an idea before you start to write code. If you can't - write step by step like in the first example then try to figure out what your idea actually is and try to refactor.