Started Rust in Action MEAP.

1 files changed, 33 insertions, 0 deletions

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);

+    }

+  }

+}