Implement minimum edit distance
This commit is contained in:
commit
5dddda3e3f
GPG key ID:
2C2C1C62A5388E82
7 changed files with 254 additions and 0 deletions
1
.envrc
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1
.envrc
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use flake
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11
.gitignore
vendored
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11
.gitignore
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@ -0,0 +1,11 @@
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/target
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/result
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/result-lib
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.direnv
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# Added by cargo
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#
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# already existing elements were commented out
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#/target
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89
Cargo.lock
generated
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89
Cargo.lock
generated
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@ -0,0 +1,89 @@
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# This file is automatically @generated by Cargo.
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# It is not intended for manual editing.
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version = 3
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[[package]]
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name = "autocfg"
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version = "1.4.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "ace50bade8e6234aa140d9a2f552bbee1db4d353f69b8217bc503490fc1a9f26"
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[[package]]
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name = "matrixmultiply"
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version = "0.3.9"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "9380b911e3e96d10c1f415da0876389aaf1b56759054eeb0de7df940c456ba1a"
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dependencies = [
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"autocfg",
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"rawpointer",
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]
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[[package]]
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name = "min-edit-dist"
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version = "0.1.0"
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dependencies = [
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"ndarray",
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]
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[[package]]
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name = "ndarray"
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version = "0.16.1"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "882ed72dce9365842bf196bdeedf5055305f11fc8c03dee7bb0194a6cad34841"
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dependencies = [
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"matrixmultiply",
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"num-complex",
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"num-integer",
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"num-traits",
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"portable-atomic",
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"portable-atomic-util",
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"rawpointer",
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]
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[[package]]
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name = "num-complex"
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version = "0.4.6"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "73f88a1307638156682bada9d7604135552957b7818057dcef22705b4d509495"
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dependencies = [
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"num-traits",
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]
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[[package]]
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name = "num-integer"
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version = "0.1.46"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "7969661fd2958a5cb096e56c8e1ad0444ac2bbcd0061bd28660485a44879858f"
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dependencies = [
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"num-traits",
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]
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[[package]]
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name = "num-traits"
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version = "0.2.19"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "071dfc062690e90b734c0b2273ce72ad0ffa95f0c74596bc250dcfd960262841"
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dependencies = [
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"autocfg",
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]
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[[package]]
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name = "portable-atomic"
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version = "1.9.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "cc9c68a3f6da06753e9335d63e27f6b9754dd1920d941135b7ea8224f141adb2"
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[[package]]
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name = "portable-atomic-util"
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version = "0.2.3"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "90a7d5beecc52a491b54d6dd05c7a45ba1801666a5baad9fdbfc6fef8d2d206c"
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dependencies = [
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"portable-atomic",
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]
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[[package]]
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name = "rawpointer"
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version = "0.2.1"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "60a357793950651c4ed0f3f52338f53b2f809f32d83a07f72909fa13e4c6c1e3"
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7
Cargo.toml
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7
Cargo.toml
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[package]
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name = "min-edit-dist"
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version = "0.1.0"
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edition = "2021"
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[dependencies]
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ndarray = "0.16.1"
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48
flake.lock
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48
flake.lock
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{
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"nodes": {
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"nixpkgs": {
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"locked": {
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"lastModified": 1729665710,
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"narHash": "sha256-AlcmCXJZPIlO5dmFzV3V2XF6x/OpNWUV8Y/FMPGd8Z4=",
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"owner": "nixos",
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"repo": "nixpkgs",
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"rev": "2768c7d042a37de65bb1b5b3268fc987e534c49d",
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"type": "github"
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},
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"original": {
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"owner": "nixos",
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"ref": "nixos-unstable",
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"repo": "nixpkgs",
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"type": "github"
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}
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},
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"root": {
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"inputs": {
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"nixpkgs": "nixpkgs",
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"rust-overlay": "rust-overlay"
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}
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},
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"rust-overlay": {
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"inputs": {
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"nixpkgs": [
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"nixpkgs"
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]
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},
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"locked": {
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"lastModified": 1729909612,
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"narHash": "sha256-eXqxxbOagphPfjPptSlv0pQONB3fH15CQ4G8uCu1BW4=",
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"owner": "oxalica",
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"repo": "rust-overlay",
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"rev": "17cadbc36da05e75197d082decb382a5f4208e30",
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"type": "github"
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},
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"original": {
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"owner": "oxalica",
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"repo": "rust-overlay",
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"type": "github"
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}
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}
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},
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"root": "root",
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"version": 7
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}
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58
flake.nix
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58
flake.nix
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{
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inputs = {
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nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
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rust-overlay = {
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url = "github:oxalica/rust-overlay";
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inputs.nixpkgs.follows = "nixpkgs";
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};
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};
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outputs = {
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self,
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nixpkgs,
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rust-overlay,
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}: let
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supportedSystems = ["x86_64-linux" "aarch64-linux" "x86_64-darwin" "aarch64-darwin"];
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forEachSupportedSystem = f:
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nixpkgs.lib.genAttrs supportedSystems (system:
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f {
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pkgs = import nixpkgs {
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inherit system;
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overlays = [rust-overlay.overlays.default self.overlays.default];
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};
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});
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in {
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overlays.default = final: prev: {
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rustToolchain = let
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rust = prev.rust-bin;
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in
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if builtins.pathExists ./rust-toolchain.toml
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then rust.fromRustupToolchainFile ./rust-toolchain.toml
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else if builtins.pathExists ./rust-toolchain
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then rust.fromRustupToolchainFile ./rust-toolchain
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else
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rust.stable.latest.default.override {
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extensions = ["rust-src" "rustfmt"];
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};
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};
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devShells = forEachSupportedSystem ({pkgs}: {
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default = pkgs.mkShell {
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packages = with pkgs; [
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rustToolchain
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openssl
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pkg-config
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cargo-deny
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cargo-edit
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cargo-watch
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rust-analyzer
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];
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env = {
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# Required by rust-analyzer
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RUST_SRC_PATH = "${pkgs.rustToolchain}/lib/rustlib/src/rust/library";
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};
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};
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});
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};
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}
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40
src/main.rs
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40
src/main.rs
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use ndarray::Array2;
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use std::cmp;
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fn main() {
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let x: &str = "intention";
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let y: &str = "execution";
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let mut matrix: Array2<i32> = Array2::zeros((x.len() + 1, y.len() + 1));
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for i in 1..=x.len() {
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matrix[[i, 0]] = i as i32;
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}
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for j in 1..=y.len() {
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matrix[[0, j]] = j as i32;
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}
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for i in 1..=x.len() {
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for j in 1..=y.len() {
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let sub_cost = if x.chars().nth(i - 1) != y.chars().nth(j - 1) {
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2
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} else {
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0
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};
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let yellow = matrix[[i - 1, j]] + 1;
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let blue = matrix[[i, j - 1]] + 1;
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let green = matrix[[i - 1, j - 1]] + sub_cost;
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matrix[[i, j]] = cmp::min(cmp::min(yellow, blue), green);
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}
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}
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println!("{}", matrix);
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println!(
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"Minimum edit distance between {} and {}: {}",
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x,
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y,
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matrix[[x.len(), y.len()]]
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);
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}
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