commit 5dddda3e3fe11a817c7a0813920bba5ce3d5b508
Author: GHOSCHT <31184695+GHOSCHT@users.noreply.github.com>
Date:   Sat Oct 26 13:46:58 2024 +0200

    Implement minimum edit distance

diff --git a/.envrc b/.envrc
new file mode 100644
index 0000000..3550a30
--- /dev/null
+++ b/.envrc
@@ -0,0 +1 @@
+use flake
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..4a34dbe
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,11 @@
+/target
+/result
+/result-lib
+.direnv
+
+
+# Added by cargo
+#
+# already existing elements were commented out
+
+#/target
diff --git a/Cargo.lock b/Cargo.lock
new file mode 100644
index 0000000..a0b4784
--- /dev/null
+++ b/Cargo.lock
@@ -0,0 +1,89 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "autocfg"
+version = "1.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ace50bade8e6234aa140d9a2f552bbee1db4d353f69b8217bc503490fc1a9f26"
+
+[[package]]
+name = "matrixmultiply"
+version = "0.3.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9380b911e3e96d10c1f415da0876389aaf1b56759054eeb0de7df940c456ba1a"
+dependencies = [
+ "autocfg",
+ "rawpointer",
+]
+
+[[package]]
+name = "min-edit-dist"
+version = "0.1.0"
+dependencies = [
+ "ndarray",
+]
+
+[[package]]
+name = "ndarray"
+version = "0.16.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "882ed72dce9365842bf196bdeedf5055305f11fc8c03dee7bb0194a6cad34841"
+dependencies = [
+ "matrixmultiply",
+ "num-complex",
+ "num-integer",
+ "num-traits",
+ "portable-atomic",
+ "portable-atomic-util",
+ "rawpointer",
+]
+
+[[package]]
+name = "num-complex"
+version = "0.4.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "73f88a1307638156682bada9d7604135552957b7818057dcef22705b4d509495"
+dependencies = [
+ "num-traits",
+]
+
+[[package]]
+name = "num-integer"
+version = "0.1.46"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7969661fd2958a5cb096e56c8e1ad0444ac2bbcd0061bd28660485a44879858f"
+dependencies = [
+ "num-traits",
+]
+
+[[package]]
+name = "num-traits"
+version = "0.2.19"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "071dfc062690e90b734c0b2273ce72ad0ffa95f0c74596bc250dcfd960262841"
+dependencies = [
+ "autocfg",
+]
+
+[[package]]
+name = "portable-atomic"
+version = "1.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cc9c68a3f6da06753e9335d63e27f6b9754dd1920d941135b7ea8224f141adb2"
+
+[[package]]
+name = "portable-atomic-util"
+version = "0.2.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "90a7d5beecc52a491b54d6dd05c7a45ba1801666a5baad9fdbfc6fef8d2d206c"
+dependencies = [
+ "portable-atomic",
+]
+
+[[package]]
+name = "rawpointer"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "60a357793950651c4ed0f3f52338f53b2f809f32d83a07f72909fa13e4c6c1e3"
diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..70773d2
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,7 @@
+[package]
+name = "min-edit-dist"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+ndarray = "0.16.1"
diff --git a/flake.lock b/flake.lock
new file mode 100644
index 0000000..d246169
--- /dev/null
+++ b/flake.lock
@@ -0,0 +1,48 @@
+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1729665710,
+        "narHash": "sha256-AlcmCXJZPIlO5dmFzV3V2XF6x/OpNWUV8Y/FMPGd8Z4=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "2768c7d042a37de65bb1b5b3268fc987e534c49d",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs",
+        "rust-overlay": "rust-overlay"
+      }
+    },
+    "rust-overlay": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1729909612,
+        "narHash": "sha256-eXqxxbOagphPfjPptSlv0pQONB3fH15CQ4G8uCu1BW4=",
+        "owner": "oxalica",
+        "repo": "rust-overlay",
+        "rev": "17cadbc36da05e75197d082decb382a5f4208e30",
+        "type": "github"
+      },
+      "original": {
+        "owner": "oxalica",
+        "repo": "rust-overlay",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}
diff --git a/flake.nix b/flake.nix
new file mode 100644
index 0000000..53ffdb0
--- /dev/null
+++ b/flake.nix
@@ -0,0 +1,58 @@
+{
+  inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
+    rust-overlay = {
+      url = "github:oxalica/rust-overlay";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+  };
+
+  outputs = {
+    self,
+    nixpkgs,
+    rust-overlay,
+  }: let
+    supportedSystems = ["x86_64-linux" "aarch64-linux" "x86_64-darwin" "aarch64-darwin"];
+    forEachSupportedSystem = f:
+      nixpkgs.lib.genAttrs supportedSystems (system:
+        f {
+          pkgs = import nixpkgs {
+            inherit system;
+            overlays = [rust-overlay.overlays.default self.overlays.default];
+          };
+        });
+  in {
+    overlays.default = final: prev: {
+      rustToolchain = let
+        rust = prev.rust-bin;
+      in
+        if builtins.pathExists ./rust-toolchain.toml
+        then rust.fromRustupToolchainFile ./rust-toolchain.toml
+        else if builtins.pathExists ./rust-toolchain
+        then rust.fromRustupToolchainFile ./rust-toolchain
+        else
+          rust.stable.latest.default.override {
+            extensions = ["rust-src" "rustfmt"];
+          };
+    };
+
+    devShells = forEachSupportedSystem ({pkgs}: {
+      default = pkgs.mkShell {
+        packages = with pkgs; [
+          rustToolchain
+          openssl
+          pkg-config
+          cargo-deny
+          cargo-edit
+          cargo-watch
+          rust-analyzer
+        ];
+
+        env = {
+          # Required by rust-analyzer
+          RUST_SRC_PATH = "${pkgs.rustToolchain}/lib/rustlib/src/rust/library";
+        };
+      };
+    });
+  };
+}
diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..239feb9
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,40 @@
+use ndarray::Array2;
+use std::cmp;
+
+fn main() {
+    let x: &str = "intention";
+    let y: &str = "execution";
+
+    let mut matrix: Array2<i32> = Array2::zeros((x.len() + 1, y.len() + 1));
+
+    for i in 1..=x.len() {
+        matrix[[i, 0]] = i as i32;
+    }
+    for j in 1..=y.len() {
+        matrix[[0, j]] = j as i32;
+    }
+
+    for i in 1..=x.len() {
+        for j in 1..=y.len() {
+            let sub_cost = if x.chars().nth(i - 1) != y.chars().nth(j - 1) {
+                2
+            } else {
+                0
+            };
+
+            let yellow = matrix[[i - 1, j]] + 1;
+            let blue = matrix[[i, j - 1]] + 1;
+            let green = matrix[[i - 1, j - 1]] + sub_cost;
+
+            matrix[[i, j]] = cmp::min(cmp::min(yellow, blue), green);
+        }
+    }
+
+    println!("{}", matrix);
+    println!(
+        "Minimum edit distance between {} and {}: {}",
+        x,
+        y,
+        matrix[[x.len(), y.len()]]
+    );
+}