--- a/Cargo.toml	Sun Feb 16 21:15:52 2020 +0100
+++ b/Cargo.toml	Mon Feb 17 15:19:49 2020 +0100
@@ -28,5 +28,5 @@
 path = "src/benches/maps_bench.rs"
 
 [workspace]
-members = ["examples/write-a-lot", "examples/leveldb-tool"]
+members = ["examples/write-a-lot", "examples/leveldb-tool", "examples/word-analyze"]
 

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/examples/word-analyze/Cargo.toml	Mon Feb 17 15:19:49 2020 +0100
@@ -0,0 +1,11 @@
+[package]
+name = "word-analyze"
+version = "0.1.0"
+authors = ["Lewin Bormann <lewin@lewin-bormann.info>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+rusty-leveldb = "0.3"
+integer-encoding = "1"

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/examples/word-analyze/src/main.rs	Mon Feb 17 15:19:49 2020 +0100
@@ -0,0 +1,43 @@
+
+use rusty_leveldb as leveldb;
+
+use std::fs::OpenOptions;
+use std::io::{self, BufRead};
+use std::path::Path;
+
+fn update_count(w: &str, db: &mut leveldb::DB) -> Option<()> {
+    let mut count: usize = 0;
+    if let Some(v) = db.get(w.as_bytes()) {
+        let s = String::from_utf8(v).unwrap();
+        count = usize::from_str_radix(&s, 10).unwrap();
+    }
+    count += 1;
+    let s = count.to_string();
+    db.put(w.as_bytes(), s.as_bytes()).unwrap();
+    Some(())
+}
+
+fn run(mut db: leveldb::DB) -> io::Result<()> {
+    let files = std::env::args().skip(1);
+
+    for f in files {
+        let f = OpenOptions::new().read(true).open(Path::new(&f))?;
+        for line in io::BufReader::new(f).lines() {
+            for word in line.unwrap().split_whitespace() {
+                let mut word = word.to_ascii_lowercase();
+                word.retain(|c| c.is_ascii_alphanumeric());
+                update_count(&word, &mut db);
+            }
+        }
+    }
+
+    Ok(())
+}
+
+fn main() {
+    let mut opts = leveldb::Options::default();
+    opts.compression_type = leveldb::CompressionType::CompressionNone;
+    let db = leveldb::DB::open("wordsdb", opts).unwrap();
+
+    run(db).unwrap();
+}