added sum-flag

src/main.rs

@@ -45,6 +45,7 @@ fn main() {
     let chars_flag = matches.get_flag("chars");
     let lines_flag = matches.get_flag("lines");
     let show_errors_flag = matches.get_flag("show-errors");
+    let sum_flag = matches.get_flag("sum");
     let word_flag = matches.get_flag("words");
 
     if let Some(_) = matches.subcommand_matches("log") {
@@ -129,6 +130,8 @@ fn main() {
             count += count_chars(content);
         } else if bytes_flag {
             count += count_bytes(content);
+        } else if sum_flag {
+            count += sum(content);
         } else {
             // count words by default
             count += count_words(content);
@@ -170,6 +173,16 @@ fn count_bytes(content: String) -> usize {
     content.par_bytes().count()
 }
 
+fn sum(content: String) -> usize {
+    content
+        .par_split_whitespace()
+        .filter_map(|x| match x.parse::<usize>() {
+            Ok(n) => Some(n),
+            _ => None,
+        })
+        .sum()
+}
+
 fn read_stdin() -> String {
     let mut input = io::stdin()
         .lock()
@@ -199,11 +212,15 @@ fn countx() -> Command {
             "Leann Phydon <[email protected]>".italic().dimmed()
         ))
         // TODO update version
-        .version("1.2.2")
+        .version("1.2.3")
         .author("Leann Phydon <[email protected]>")
         .arg(
             Arg::new("arg")
                 .help("The filepath to work with")
+                .long_help(format!(
+                    "{}\n{}",
+                    "The filepath to work with", "Reads stdin if left empty"
+                ))
                 .action(ArgAction::Set)
                 .num_args(1)
                 .value_name("PATH"),
@@ -240,6 +257,13 @@ fn countx() -> Command {
                 .help("Show errors (ignores errors by default)")
                 .action(ArgAction::SetTrue),
         )
+        .arg(
+            Arg::new("sum")
+                .short('s')
+                .long("sum")
+                .help("Sum up all integers")
+                .action(ArgAction::SetTrue),
+        )
         .arg(
             Arg::new("words")
                 .short('w')
@@ -289,6 +313,14 @@ $ echo 'Some pipe input' | cx
 3
     "###
     );
+
+    println!("\n{}\n----------", "Example 3".bold());
+    println!(
+        r###"
+$ echo 'This 42 is 1337 a t35t 666' | cx --sum
+2045
+    "###
+    );
 }
 
 fn check_create_config_dir() -> io::Result<PathBuf> {
@@ -365,6 +397,14 @@ mod tests {
         assert_eq!(result, expected);
     }
 
+    #[test]
+    fn sum_test() {
+        let input = "This 42 is 1337 a t35t 666".to_string();
+        let result = sum(input);
+        let expected = 2045;
+        assert_eq!(result, expected);
+    }
+
     #[test]
     fn count_words_empty_test() {
         let input = "".to_string();
@@ -396,4 +436,12 @@ mod tests {
         let expected = 0;
         assert_eq!(result, expected);
     }
+
+    #[test]
+    fn sum_empty_test() {
+        let input = "".to_string();
+        let result = sum(input);
+        let expected = 0;
+        assert_eq!(result, expected);
+    }
 }