代码结构优化

src/prehandle.rs

@@ -17,12 +17,8 @@ fn filter_by_string(reader: Vec<String>, filter_str: &str) ->Vec<String>{
     }
     let mut result: Vec<String> = Vec::new();
     result.push(reader[0].clone());
-    for line in reader[1..].iter(){
-        if line.contains(filter_str){
-            result.push(line.to_string());
-        }
-    }
-    return result;
+    result.extend(reader.into_iter().skip(1).filter(|line| line.contains(filter_str)));
+    result
 }
 
 fn take(reader: &mut Vec<String>, start_index: u32, end_index: u32) -> Vec<String> {