Weekly Challenge Blast from the Past

2 files changed, 62 insertions, 0 deletions

diff --git a/challenge-004/zapwai/rust/ch-1.rs b/challenge-004/zapwai/rust/ch-1.rs
new file mode 100644
index 0000000000..494269972c
--- /dev/null
+++ b/challenge-004/zapwai/rust/ch-1.rs
@@ -0,0 +1,17 @@
+use std::process::Command;
+use std::io::prelude::*;
+use std::fs::File;
+use std::io::SeekFrom;
+fn main(){
+    Command::new("curl").arg("-s").arg("http://www.geom.uiuc.edu/~huberty/math5337/groupe/digits.html").arg("-o").arg("pi.txt").output().expect("no curl");
+    let mut file = File::open("pi.txt").expect("no pi");
+    file.seek(SeekFrom::Start(326)).unwrap();
+    let mut buffer = [0;590];
+    file.read_exact(&mut buffer).unwrap();
+    let string_buffer = String::from_utf8_lossy(&buffer);
+    for c in string_buffer.split("") {
+	if c != "\n" {
+	    print!("{}", c);
+	}
+    }
+}
diff --git a/challenge-004/zapwai/rust/ch-2.rs b/challenge-004/zapwai/rust/ch-2.rs
new file mode 100644
index 0000000000..c23fb6f568
--- /dev/null
+++ b/challenge-004/zapwai/rust/ch-2.rs
@@ -0,0 +1,45 @@
+use std::collections::HashMap;
+use std::fs;
+
+fn main() {
+    let allow = "docgotrark";
+    let file_path = "004-file.txt";
+    let contents = fs::read_to_string(file_path)
+        .expect("No file?");
+    let words = contents.split("\n");    
+//    let words = ["dog", "chair", "rack", "doggo"];    
+    let mut f = HashMap::new();
+    fill(&mut f, allow);
+    println!("Input: {allow}");
+    let mut ans = Vec::new();
+    for word in words {
+	let mut g = HashMap::new();
+	fill(&mut g, word);
+	if comp(&f, &g) {
+	    ans.push(word);
+	}
+    }
+    ans.pop();
+    println!("Output: {:?}",ans);
+}
+
+fn fill(f :&mut HashMap<char, i32>, allow :&str) {
+    for c in allow.chars() {
+	f.insert(c, 0);
+    }
+    for c in allow.chars() {
+	f.insert(c, f.get(&c).unwrap() + 1);
+    }
+}
+
+fn comp(f : &HashMap<char, i32>, g : &HashMap<char, i32>) -> bool {
+    for k in g.keys() {
+	if !f.contains_key(k) {
+	    return false;
+	}
+	if f.get(k) < g.get(k) {
+	    return false;
+	}
+    }
+    return true;
+}