From 67cdcc2e12118becb823e20a40cc2687f2b8425a Mon Sep 17 00:00:00 2001
From: Adam Carpenter <53hornet@gmail.com>
Date: Wed, 27 Mar 2019 15:32:37 -0400
Subject: Started Rust in Action MEAP.

---
 meap/meap-code/ch1/ch1-hashmap-hashset.rs | 33 +++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)
 create mode 100644 meap/meap-code/ch1/ch1-hashmap-hashset.rs

(limited to 'meap/meap-code/ch1/ch1-hashmap-hashset.rs')

diff --git a/meap/meap-code/ch1/ch1-hashmap-hashset.rs b/meap/meap-code/ch1/ch1-hashmap-hashset.rs
new file mode 100644
index 0000000..1fa9229
--- /dev/null
+++ b/meap/meap-code/ch1/ch1-hashmap-hashset.rs
@@ -0,0 +1,33 @@
+use std::collections::{HashMap, HashSet};
+
+fn main() {
+
+  let input_text = "does this work
+  i dont know
+  how rust works";
+
+  let mut character_counts = HashMap::new();
+
+  let mut n_lines = 0u32;
+
+  for l in input_text.lines() {
+    n_lines = n_lines + 1;
+
+    let mut chars_for_line = HashSet::new();
+
+    for c in l.chars() {
+      if chars_for_line.contains(&c) {
+        continue
+      }
+      let c_count = character_counts.entry(c).or_insert(0u32);
+      *c_count += 1;
+      chars_for_line.insert(c);
+    }
+  }
+
+  for (c, c_count) in &character_counts {
+    if *c_count == n_lines {
+      println!("{}", c);
+    }
+  }
+}
-- 
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