use a set to only show unique links

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "leth"
-version = "0.1.1"
+version = "0.1.2"
 authors = ["fcd <[email protected]>"]
 edition = "2018"
 

src/main.rs

@@ -1,6 +1,7 @@
 extern crate regex;
 extern crate skim;
 
+use std::collections::HashSet;
 use std::io::Cursor;
 use std::io::{self, Read};
 use std::process::Command;
@@ -20,16 +21,17 @@ pub fn main() {
     io::stdin().read_to_string(&mut buffer).unwrap();
     let lines = buffer.split("\n");
 
-    let mut matches: Vec<&str> = Vec::new();
+    let mut matches: HashSet<&str> = HashSet::new();
 
     for line in lines {
         for capture in re.captures_iter(line) {
             let url_match = capture.get(1).unwrap().as_str();
-            matches.push(url_match);
+            matches.insert(url_match);
         }
     }
 
-    let items = matches.join("\n");
+    let unique_items: Vec<&str> = matches.into_iter().collect();
+    let items = unique_items.join("\n");
     // `run_with` would read and show items from the stream
     let selected_items = Skim::run_with(&options, Some(Box::new(Cursor::new(items))))
         .map(|out| out.selected_items)