From 78b7a3718a7d5c1ae75241bce1144fd723de3954 Mon Sep 17 00:00:00 2001
From: Andrew Redmond <adredmond@gmail.com>
Date: Thu, 4 Mar 2021 22:17:38 -0500
Subject: changes to args collection processing. ignorables converted to
 HashSet.

---
 src/main.rs | 41 ++++++++++++++++++++++++-----------------
 1 file changed, 24 insertions(+), 17 deletions(-)

diff --git a/src/main.rs b/src/main.rs
index b060ed1..c5b5b83 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,3 +1,5 @@
+use std::iter::FromIterator;
+use std::collections::HashSet;
 use std::env::args;
 use std::io::{stdin, BufRead, BufReader};
 
@@ -17,14 +19,14 @@ const EXCEPTIONS: &[&str] = &[
 /// - Words are not capitalized if they are EXCEPTIONS, unless...
 /// - Words are either the first or the last word.
 fn main() {
-    let mut args = args();
-    args.next(); // ignore self arg
-    let mut ignorables = Vec::new();
+    let args: Vec<String> = args().skip(1).collect();
+    let mut ignorables: HashSet<String> = HashSet::new();
 
-    while let Some(arg) = args.next() {
+    for arg in args.iter() {
         match arg.as_str() {
             "--ignore" | "-i" => {
-                ignorables = args.collect();
+                ignorables = HashSet::from_iter(args.iter().cloned().skip(1).collect::<Vec<String>>());
+                println!("{:?}", ignorables);
                 break;
             }
             "--help" | "-h" => {
@@ -43,7 +45,7 @@ fn main() {
 }
 
 /// Corrects a single line (title) based on placement and exceptions.
-fn correct_line(line: &str, ignorables: &[String]) -> String {
+fn correct_line(line: &str, ignorables: &HashSet<String>) -> String {
     let mut line = line.split_whitespace().peekable();
     let mut result = Vec::new();
 
@@ -65,8 +67,8 @@ fn correct_line(line: &str, ignorables: &[String]) -> String {
 }
 
 /// Corrects a single word based on exceptions and ignorables.
-fn correct_word(word: &str, first_or_last: bool, ignorables: &[String]) -> String {
-    if ignorables.iter().any(|s| s == word) {
+fn correct_word(word: &str, first_or_last: bool, ignorables: &HashSet<String>) -> String {
+    if ignorables.contains(word) {
         // leave ignorables untouched
         word.to_owned()
     } else if first_or_last || !EXCEPTIONS.iter().any(|s| **s == word.to_lowercase()) {
@@ -100,38 +102,43 @@ mod tests {
 
     #[test]
     fn test_correct_word() {
-        assert_eq!(correct_word("Like", false, &[]), String::from("like"));
-        assert_eq!(correct_word("like", false, &[]), String::from("like"));
-        assert_eq!(correct_word("like", true, &[]), String::from("Like"));
-        assert_eq!(correct_word("liKe", false, &[]), String::from("like"));
+        let ignores: HashSet<String> = HashSet::new();
+        assert_eq!(correct_word("Like", false, &ignores), String::from("like"));
+        assert_eq!(correct_word("like", false, &ignores), String::from("like"));
+        assert_eq!(correct_word("like", true, &ignores), String::from("Like"));
+        assert_eq!(correct_word("liKe", false, &ignores), String::from("like"));
         assert_eq!(
-            correct_word("computers", false, &[]),
+            correct_word("computers", false, &ignores),
             String::from("Computers")
         );
     }
 
     #[test]
     fn test_correct_line() {
+        let ignores: HashSet<String> = HashSet::new();
         assert_eq!(
-            correct_line("this is a test", &[]),
+            correct_line("this is a test", &ignores),
             String::from("This Is a Test")
         );
         assert_eq!(
-            correct_line("similEs: lIke Or As", &[]),
+            correct_line("similEs: lIke Or As", &ignores),
             String::from("Similes: like or As")
         );
     }
 
     #[test]
     fn test_proper_nouns_acronyms() {
+        let ignores: HashSet<String> = ["FreeBSD".to_string()].iter().cloned().collect();
+
         assert_eq!(
-            correct_line("FreeBSD", &[String::from("FreeBSD")]),
+            correct_line("FreeBSD", &ignores),
             String::from("FreeBSD")
         );
     }
 
     #[test]
     fn test_empty_lines() {
-        assert_eq!(correct_line("", &[]), String::from(""));
+        let ignores: HashSet<String> = HashSet::new();
+        assert_eq!(correct_line("", &ignores), String::from(""));
     }
 }
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