diff --git a/rustbyexample/01/Cargo.lock b/rustbyexample/01/Cargo.lock
deleted file mode 100644
index 00e1fed..0000000
--- a/rustbyexample/01/Cargo.lock
+++ /dev/null
@@ -1,4 +0,0 @@
-[root]
-name = "01"
-version = "0.1.0"
-
diff --git a/rustbyexample/01/Cargo.toml b/rustbyexample/01/Cargo.toml
deleted file mode 100644
index 84b0d89..0000000
--- a/rustbyexample/01/Cargo.toml
+++ /dev/null
@@ -1,6 +0,0 @@
-[package]
-name = "01"
-version = "0.1.0"
-authors = ["Dan Buch <daniel.buch@gmail.com>"]
-
-[dependencies]
diff --git a/rustbyexample/01/src/main.rs b/rustbyexample/01/src/main.rs
deleted file mode 100644
index 4d7fa03..0000000
--- a/rustbyexample/01/src/main.rs
+++ /dev/null
@@ -1,26 +0,0 @@
-fn main() {
-    println!("{} days", 31);
-
-    println!("{0}, this is {1}. {1}, this is {0}", "Alice", "Bob");
-
-    println!("{subject} {verb} {object}",
-             object="the lazy dog",
-             subject="the quick brown fox",
-             verb="jumps over");
-
-    println!("{} of {:b} people know binary, the other half don't", 1, 2);
-
-    println!("{number:>width$}", number=1, width=6);
-
-    println!("{number:0>width$}", number=1, width=6);
-
-    println!("My name is {0}, {1} {0}", "Bond", "James");
-
-#[allow(dead_code)]
-    struct Structure(i32);
-
-    // println!("This struct `{}` won't print...", Structure(3));
-
-    let pi = 3.141592;
-    println!("Pi is roughly {:.*}", 3, pi);
-}
diff --git a/rustbyexample/0122/Cargo.lock b/rustbyexample/0122/Cargo.lock
deleted file mode 100644
index 05769cc..0000000
--- a/rustbyexample/0122/Cargo.lock
+++ /dev/null
@@ -1,4 +0,0 @@
-[root]
-name = "0122"
-version = "0.1.0"
-
diff --git a/rustbyexample/0122/Cargo.toml b/rustbyexample/0122/Cargo.toml
deleted file mode 100644
index 8fd0278..0000000
--- a/rustbyexample/0122/Cargo.toml
+++ /dev/null
@@ -1,6 +0,0 @@
-[package]
-name = "0122"
-version = "0.1.0"
-authors = ["Dan Buch <daniel.buch@gmail.com>"]
-
-[dependencies]
diff --git a/rustbyexample/0122/src/main.rs b/rustbyexample/0122/src/main.rs
deleted file mode 100644
index c0009fd..0000000
--- a/rustbyexample/0122/src/main.rs
+++ /dev/null
@@ -1,61 +0,0 @@
-use std::fmt;
-
-#[derive(Debug)]
-struct MinMax(i64, i64);
-
-impl fmt::Display for MinMax {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        write!(f, "({}, {})", self.0, self.1)
-    }
-}
-
-#[derive(Debug)]
-struct Point2 {
-    x: f64,
-    y: f64,
-}
-
-impl fmt::Display for Point2 {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        write!(f, "x: {}, y: {}", self.x, self.y)
-    }
-}
-
-#[derive(Debug)]
-struct Complex {
-    real: f64,
-    imag: f64,
-}
-
-impl fmt::Display for Complex {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        write!(f, "real: {}, imag: {}", self.real, self.imag)
-    }
-}
-
-fn main() {
-    let minmax = MinMax(0, 14);
-
-    println!("Compare structures:");
-    println!("Display: {}", minmax);
-    println!("Debug: {:?}", minmax);
-
-    let big_range = MinMax(-300, 300);
-    let small_range = MinMax(-3, 3);
-
-    println!("The big range is {big} and the small range is {small}",
-             small=small_range,
-             big=big_range);
-
-    let point = Point2 { x: 3.3, y: 7.2 };
-
-    println!("Compare points:");
-    println!("Display: {}", point);
-    println!("Debug: {:?}", point);
-
-    let compl = Complex { real: 3.3, imag: 7.2 };
-
-    println!("Compare complex:");
-    println!("Display: {}", compl);
-    println!("Debug: {:?}", compl);
-}
diff --git a/rustbyexample/01221/Cargo.lock b/rustbyexample/01221/Cargo.lock
deleted file mode 100644
index 4f28163..0000000
--- a/rustbyexample/01221/Cargo.lock
+++ /dev/null
@@ -1,4 +0,0 @@
-[root]
-name = "01221"
-version = "0.1.0"
-
diff --git a/rustbyexample/01221/Cargo.toml b/rustbyexample/01221/Cargo.toml
deleted file mode 100644
index 53aae60..0000000
--- a/rustbyexample/01221/Cargo.toml
+++ /dev/null
@@ -1,6 +0,0 @@
-[package]
-name = "01221"
-version = "0.1.0"
-authors = ["Dan Buch <daniel.buch@gmail.com>"]
-
-[dependencies]
diff --git a/rustbyexample/01221/src/main.rs b/rustbyexample/01221/src/main.rs
deleted file mode 100644
index 98e9783..0000000
--- a/rustbyexample/01221/src/main.rs
+++ /dev/null
@@ -1,23 +0,0 @@
-use std::fmt;
-
-struct List(Vec<i32>);
-
-impl fmt::Display for List {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        let List(ref vec) = *self;
-
-        try!(write!(f, "["));
-
-        for (count, v) in vec.iter().enumerate() {
-            if count != 0 { try!(write!(f, ", ")); }
-            try!(write!(f, "{}: {}", count, v));
-        }
-
-        write!(f, "]")
-    }
-}
-
-fn main() {
-    let v = List(vec![1, 2, 3]);
-    println!("{}", v);
-}
diff --git a/rustbyexample/0123/Cargo.lock b/rustbyexample/0123/Cargo.lock
deleted file mode 100644
index 126702b..0000000
--- a/rustbyexample/0123/Cargo.lock
+++ /dev/null
@@ -1,4 +0,0 @@
-[root]
-name = "0123"
-version = "0.1.0"
-
diff --git a/rustbyexample/0123/Cargo.toml b/rustbyexample/0123/Cargo.toml
deleted file mode 100644
index 5719d27..0000000
--- a/rustbyexample/0123/Cargo.toml
+++ /dev/null
@@ -1,6 +0,0 @@
-[package]
-name = "0123"
-version = "0.1.0"
-authors = ["Dan Buch <daniel.buch@gmail.com>"]
-
-[dependencies]
diff --git a/rustbyexample/0123/src/main.rs b/rustbyexample/0123/src/main.rs
deleted file mode 100644
index 5658d6c..0000000
--- a/rustbyexample/0123/src/main.rs
+++ /dev/null
@@ -1,50 +0,0 @@
-use std::fmt::{self, Formatter, Display};
-
-struct City {
-    name: &'static str,
-    lat: f32,
-    lon: f32,
-}
-
-impl Display for City {
-    fn fmt(&self, f: &mut Formatter) -> fmt::Result {
-        let lat_c = if self.lat >= 0.0 { 'N' } else { 'S' };
-        let lon_c = if self.lon >= 0.0 { 'E' } else { 'S' };
-
-        write!(f, "{}: {:.3}˚{} {:.3}˚{}",
-               self.name, self.lat.abs(), lat_c, self.lon.abs(), lon_c)
-    }
-}
-
-#[derive(Debug)]
-struct Color {
-    red: u8,
-    green: u8,
-    blue: u8,
-}
-
-impl Display for Color {
-    fn fmt(&self, f: &mut Formatter) -> fmt::Result {
-        write!(f, "RGB ({}, {}, {}) 0x{:02X}{:02X}{:02X}", self.red, self.green, self.blue, self.red, self.green, self.blue)
-    }
-}
-
-
-fn main() {
-    for city in [
-        City { name: "Dublin", lat: 53.347778, lon: -6.259722 },
-        City { name: "Oslo", lat: 59.95, lon: 10.75 },
-        City { name: "Vancouver", lat: 49.25, lon: -123.1 },
-    ].iter() {
-        println!("{}", *city);
-    }
-
-    for color in [
-        Color { red: 128, green: 255, blue: 90 },
-        Color { red: 0, green: 3, blue: 254 },
-        Color { red: 0, green: 0, blue: 0 },
-    ].iter() {
-        println!("{:?}", *color);
-        println!("{}", *color);
-    }
-}
diff --git a/rustbyexample/022/Cargo.lock b/rustbyexample/022/Cargo.lock
deleted file mode 100644
index 3808199..0000000
--- a/rustbyexample/022/Cargo.lock
+++ /dev/null
@@ -1,4 +0,0 @@
-[root]
-name = "022"
-version = "0.1.0"
-
diff --git a/rustbyexample/022/Cargo.toml b/rustbyexample/022/Cargo.toml
deleted file mode 100644
index f900ba9..0000000
--- a/rustbyexample/022/Cargo.toml
+++ /dev/null
@@ -1,6 +0,0 @@
-[package]
-name = "022"
-version = "0.1.0"
-authors = ["Dan Buch <daniel.buch@gmail.com>"]
-
-[dependencies]
diff --git a/rustbyexample/022/src/main.rs b/rustbyexample/022/src/main.rs
deleted file mode 100644
index 62e381e..0000000
--- a/rustbyexample/022/src/main.rs
+++ /dev/null
@@ -1,54 +0,0 @@
-use std::fmt;
-
-fn reverse(pair: (i32, bool)) -> (bool, i32) {
-    let (integer, boolean) = pair;
-    (boolean, integer)
-}
-
-fn transpose(matrix: Matrix) -> Matrix {
-    Matrix(matrix.0, matrix.2, matrix.1, matrix.3)
-}
-
-#[derive(Debug)]
-struct Matrix(f32, f32, f32, f32);
-
-impl fmt::Display for Matrix {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        write!(f, "( {} {} )\n( {} {} )", self.0, self.1, self.2, self.3)
-    }
-}
-
-fn main() {
-    let long_tuple = (1u8, 2u16, 3u32, 4u64,
-                      -1i8, -2i16, -3i32, -4i64,
-                      0.1f32, 0.2f64,
-                      'a', true);
-
-    println!("long tuple first value: {}", long_tuple.0);
-    println!("long tuple second value: {}", long_tuple.1);
-
-    let tuple_of_tuples = ((1u8, 2u16, 2u32), (4u64, -1i8), -2i16);
-
-    println!("tuple of tuples: {:?}", tuple_of_tuples);
-
-    let pair = (1, true);
-    println!("pair is {:?}", pair);
-
-    println!("the reversed pair is {:?}", reverse(pair));
-
-    println!("one element tuple: {:?}", (5u32,));
-    println!("just an integer: {:?}", (5u32));
-
-    let tuple = (1, "hello", 4.5, true);
-
-    let (a, b, c, d) = tuple;
-    println!("{:?}, {:?}, {:?}, {:?}", a, b, c, d);
-
-    let matrix = Matrix(1.1, 1.2, 2.1, 2.2);
-    println!("{:?}", matrix);
-
-    println!("{}", matrix);
-
-    println!("Matrix:\n{}", matrix);
-    println!("Transpose:\n{}", transpose(matrix));
-}
diff --git a/rustbyexample/031/Cargo.lock b/rustbyexample/031/Cargo.lock
deleted file mode 100644
index a720929..0000000
--- a/rustbyexample/031/Cargo.lock
+++ /dev/null
@@ -1,4 +0,0 @@
-[root]
-name = "031"
-version = "0.1.0"
-
diff --git a/rustbyexample/031/Cargo.toml b/rustbyexample/031/Cargo.toml
deleted file mode 100644
index 13d08f7..0000000
--- a/rustbyexample/031/Cargo.toml
+++ /dev/null
@@ -1,6 +0,0 @@
-[package]
-name = "031"
-version = "0.1.0"
-authors = ["Dan Buch <daniel.buch@gmail.com>"]
-
-[dependencies]
diff --git a/rustbyexample/031/src/main.rs b/rustbyexample/031/src/main.rs
deleted file mode 100644
index 6f507fc..0000000
--- a/rustbyexample/031/src/main.rs
+++ /dev/null
@@ -1,64 +0,0 @@
-struct Nil;
-
-struct Pair(i32, f32);
-
-#[derive(Debug)]
-struct Point {
-    x: f32,
-    y: f32,
-}
-
-#[derive(Debug)]
-struct Rectangle {
-    p1: Point,
-    p2: Point,
-}
-
-fn rect_area(rect: Rectangle) -> f32 {
-    let Rectangle {
-        p1: Point { x: x1, y: y1 },
-        p2: Point { x: x2, y: y2 }
-    } = rect;
-    ((x1 - x2) * (y1 - y2)).abs()
-}
-
-fn square(point: Point, dim: f32) -> Rectangle {
-    Rectangle {
-        p1: Point { x: point.x, y: point.y },
-        p2: Point { x: point.x + dim, y: point.y + dim },
-    }
-}
-
-fn main() {
-    let point: Point = Point { x: 0.3, y: 0.4 };
-
-    println!("point coordinates: ({}, {})", point.x, point.y);
-
-    let Point { x: my_x, y: my_y } = point;
-
-    let _rectangle = Rectangle {
-        p1: Point { x: my_y, y: my_x },
-        p2: Point { x: point.x, y: point.y },
-    };
-
-    let _nil = Nil;
-
-    let pair = Pair(1, 0.1);
-
-    println!("pair contains {:?} and {:?}", pair.0, pair.1);
-
-    let Pair(integer, decimal) = pair;
-
-    println!("pair contains {:?} and {:?}", integer, decimal);
-
-    println!("rect is {:?}", _rectangle);
-    println!("rect area is {}", rect_area(_rectangle));
-
-    let dim = 9.1f32;
-
-    println!("point is {:?}", point);
-    println!("dim is {:?}", dim);
-    let sq = square(point, dim);
-    println!("square is {:?}", sq);
-    println!("square area is {}", rect_area(sq));
-}