gistfile1.txt

  // 1. Must only say "ClientError::*" ONCE.
  // 2. Must return Result<usize, ClientError::IndexParseError>
  // 3. No nesting blocks, according to RustFMT
  // 4. Can be no unwrap, or try macro
  //use std::ops::Deref;
  let services = document         
      .select("ul.info")         
      .ok()         
      .and_then( |mut select| select.nth(1) )         
      .as_ref()         
      .map( |ndr| ndr.as_node() )         
      .and_then( |dn| dn.select("li").ok() )         
      .map( |e| e.map( |e| e.text_contents() ).collect::<Vec<String>>() )         
      .ok_or(ClientError::DownloadFailed(listing_url.to_owned()))?;