Previous experiments

bitcount.rs

@@ -0,0 +1,11 @@
+fn count(bits: usize) -> u32 {
+    let num_bits = usize::BITS;
+    num_bits as u32 - bits.leading_zeros() + 1
+}
+
+fn main() {
+    println!("{}", count(0b111));
+    println!("{}", count(0b1111_1111));
+    println!("{}", count(64)); // 1000000
+    println!("{}", 1 >> 1);
+}

defaultoption.rs

@@ -0,0 +1,9 @@
+#[derive(Debug, Default)]
+struct Example {
+    exists: Option<u8>,
+}
+
+fn main() {
+    let e = Example::default();
+    println!("Herro: {:?}", e);
+}

dieseltest/.env

@@ -0,0 +1 @@
+DATABASE_URL=postgres://consig:config@localhost/candles

dieseltest/Cargo.lock

@@ -0,0 +1,102 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "bitflags"
+version = "1.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"
+
+[[package]]
+name = "byteorder"
+version = "1.4.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "14c189c53d098945499cdfa7ecc63567cf3886b3332b312a5b4585d8d3a6a610"
+
+[[package]]
+name = "diesel"
+version = "1.4.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b28135ecf6b7d446b43e27e225622a038cc4e2930a1022f51cdb97ada19b8e4d"
+dependencies = [
+ "bitflags",
+ "byteorder",
+ "diesel_derives",
+ "pq-sys",
+]
+
+[[package]]
+name = "diesel_derives"
+version = "1.4.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "45f5098f628d02a7a0f68ddba586fb61e80edec3bdc1be3b921f4ceec60858d3"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "dieseltest"
+version = "0.1.0"
+dependencies = [
+ "diesel",
+ "dotenv",
+]
+
+[[package]]
+name = "dotenv"
+version = "0.15.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "77c90badedccf4105eca100756a0b1289e191f6fcbdadd3cee1d2f614f97da8f"
+
+[[package]]
+name = "pq-sys"
+version = "0.4.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6ac25eee5a0582f45a67e837e350d784e7003bd29a5f460796772061ca49ffda"
+dependencies = [
+ "vcpkg",
+]
+
+[[package]]
+name = "proc-macro2"
+version = "1.0.32"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ba508cc11742c0dc5c1659771673afbab7a0efab23aa17e854cbab0837ed0b43"
+dependencies = [
+ "unicode-xid",
+]
+
+[[package]]
+name = "quote"
+version = "1.0.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "38bc8cc6a5f2e3655e0899c1b848643b2562f853f114bfec7be120678e3ace05"
+dependencies = [
+ "proc-macro2",
+]
+
+[[package]]
+name = "syn"
+version = "1.0.81"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f2afee18b8beb5a596ecb4a2dce128c719b4ba399d34126b9e4396e3f9860966"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "unicode-xid",
+]
+
+[[package]]
+name = "unicode-xid"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8ccb82d61f80a663efe1f787a51b16b5a51e3314d6ac365b08639f52387b33f3"
+
+[[package]]
+name = "vcpkg"
+version = "0.2.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "accd4ea62f7bb7a82fe23066fb0957d48ef677f6eeb8215f372f52e48bb32426"

dieseltest/Cargo.toml

@@ -0,0 +1,10 @@
+[package]
+name = "dieseltest"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+diesel = { version = "1.4.8", features = ["postgres"] }
+dotenv = "0.15.0"

dieseltest/README.md

@@ -0,0 +1,3 @@
+# DieselTest
+
+Testing Diesel.

dieseltest/diesel.toml

@@ -0,0 +1,5 @@
+# For documentation on how to configure this file,
+# see diesel.rs/guides/configuring-diesel-cli
+
+[print_schema]
+file = "src/schema.rs"

dieseltest/migrations/00000000000000_diesel_initial_setup/down.sql

@@ -0,0 +1,6 @@
+-- This file was automatically created by Diesel to setup helper functions
+-- and other internal bookkeeping. This file is safe to edit, any future
+-- changes will be added to existing projects as new migrations.
+
+DROP FUNCTION IF EXISTS diesel_manage_updated_at(_tbl regclass);
+DROP FUNCTION IF EXISTS diesel_set_updated_at();

dieseltest/migrations/00000000000000_diesel_initial_setup/up.sql

@@ -0,0 +1,36 @@
+-- This file was automatically created by Diesel to setup helper functions
+-- and other internal bookkeeping. This file is safe to edit, any future
+-- changes will be added to existing projects as new migrations.
+
+
+
+
+-- Sets up a trigger for the given table to automatically set a column called
+-- `updated_at` whenever the row is modified (unless `updated_at` was included
+-- in the modified columns)
+--
+-- # Example
+--
+-- ```sql
+-- CREATE TABLE users (id SERIAL PRIMARY KEY, updated_at TIMESTAMP NOT NULL DEFAULT NOW());
+--
+-- SELECT diesel_manage_updated_at('users');
+-- ```
+CREATE OR REPLACE FUNCTION diesel_manage_updated_at(_tbl regclass) RETURNS VOID AS $$
+BEGIN
+    EXECUTE format('CREATE TRIGGER set_updated_at BEFORE UPDATE ON %s
+                    FOR EACH ROW EXECUTE PROCEDURE diesel_set_updated_at()', _tbl);
+END;
+$$ LANGUAGE plpgsql;
+
+CREATE OR REPLACE FUNCTION diesel_set_updated_at() RETURNS trigger AS $$
+BEGIN
+    IF (
+        NEW IS DISTINCT FROM OLD AND
+        NEW.updated_at IS NOT DISTINCT FROM OLD.updated_at
+    ) THEN
+        NEW.updated_at := current_timestamp;
+    END IF;
+    RETURN NEW;
+END;
+$$ LANGUAGE plpgsql;

dieseltest/migrations/2021-11-24-125522_assets/down.sql

@@ -0,0 +1,2 @@
+-- This file should undo anything in `up.sql`
+DROP TABLE assets;

dieseltest/migrations/2021-11-24-125522_assets/up.sql

@@ -0,0 +1,9 @@
+CREATE TABLE assets (
+	id SERIAL PRIMARY KEY,
+	name TEXT NOT NULL,
+	source TEXT NOT NULL
+	-- extras?
+);
+CREATE INDEX source_idx on assets (source);
+
+SELECT diesel_manage_updated_at('assets');

dieseltest/src/main.rs

@@ -0,0 +1,8 @@
+use diesel::prelude::*;
+
+mod models;
+mod schema;
+
+fn main() {
+    println!("Hello, world!");
+}

dieseltest/src/models.rs

@@ -0,0 +1,7 @@
+use diesel::Queryable;
+
+#[derive(Queryable)]
+pub struct Asset {
+    pub name: String,
+    pub source: String,
+}

dieseltest/src/schema.rs

@@ -0,0 +1,7 @@
+table! {
+    assets (id) {
+        id -> Int4,
+        name -> Text,
+        source -> Text,
+    }
+}

exename.rs

@@ -0,0 +1,13 @@
+use std::env;
+use std::path::Path;
+
+fn main() {
+    let execution_name = env::args().nth(0).unwrap_or("???".to_string());
+    let parser = Path::new(&execution_name)
+        .file_name()
+        .map(|x| x.to_str())
+        .flatten()
+        .unwrap_or("???");
+    println!("I am {}", execution_name);
+    println!("And the name is {}", parser);
+}

nng/Cargo.lock

@@ -0,0 +1,69 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "cc"
+version = "1.0.72"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "22a9137b95ea06864e018375b72adfb7db6e6f68cfc8df5a04d00288050485ee"
+
+[[package]]
+name = "client"
+version = "0.1.0"
+
+[[package]]
+name = "cmake"
+version = "0.1.48"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e8ad8cef104ac57b68b89df3208164d228503abbdce70f6880ffa3d970e7443a"
+dependencies = [
+ "cc",
+]
+
+[[package]]
+name = "gcc"
+version = "0.3.55"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8f5f3913fa0bfe7ee1fd8248b6b9f42a5af4b9d65ec2dd2c3c26132b950ecfc2"
+
+[[package]]
+name = "libc"
+version = "0.2.113"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "eef78b64d87775463c549fbd80e19249ef436ea3bf1de2a1eb7e717ec7fab1e9"
+
+[[package]]
+name = "nanomsg"
+version = "0.7.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "617e0160fba522f8667df7bc79f3b4a74a0e3968d08023ebb3ce717a5f3bd3ac"
+dependencies = [
+ "libc",
+ "nanomsg-sys",
+]
+
+[[package]]
+name = "nanomsg-sys"
+version = "0.7.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "78aa3ccb6d007dfecb4f7070725c4b1670a87677babb6621cb0c8cce9cfdc004"
+dependencies = [
+ "cmake",
+ "gcc",
+ "libc",
+ "pkg-config",
+]
+
+[[package]]
+name = "pkg-config"
+version = "0.3.24"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "58893f751c9b0412871a09abd62ecd2a00298c6c83befa223ef98c52aef40cbe"
+
+[[package]]
+name = "server"
+version = "0.1.0"
+dependencies = [
+ "nanomsg",
+]

nng/Cargo.toml

@@ -0,0 +1,5 @@
+[workspace]
+members = [
+	"server",
+	"client",
+]

nng/client/Cargo.toml

@@ -0,0 +1,8 @@
+[package]
+name = "client"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]

nng/client/src/main.rs

@@ -0,0 +1,3 @@
+fn main() {
+    println!("Hello, world!");
+}

nng/server/Cargo.toml

@@ -0,0 +1,9 @@
+[package]
+name = "server"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+nanomsg = "0.7.2"

nng/server/src/main.rs

@@ -0,0 +1,8 @@
+use nanomsg::Protocol;
+use nanomsg::Socket;
+
+fn main() {
+    println!("Starting server...");
+
+    let mut socket = Socket::new(Protocol::Sub).unwrap();
+}

specgen.rs

@@ -0,0 +1,10 @@
+//! Test if one can create a generic and a specific impl for the same trait.
+
+trait SomeTrait {
+    fn say(&self) -> String;
+}
+
+struct SomeStruct<T> {}
+
+impl<T> for SomeStruct<T>
+where T: SomeTrait

spongebob.rs

@@ -0,0 +1,10 @@
+fn main() {
+    let phrase = std::env::args().skip(1).collect::<Vec<String>>().join(" ");
+    let mapper = [
+        Box::new(|x: char| x.to_uppercase()),
+        Box::new(|x: char| x.to_lowercase()),
+    ]
+    .iter()
+    .cycle();
+    println!("{}", phrase.chars().map(mapper.next()).collect().join(""));
+}

while.rs

@@ -0,0 +1,9 @@
+fn main() {
+    let data = [0b1000_0001u8, 0b0000_0010, 0b1000_0011];
+    let mut main_iter = data.iter();
+    let mut simple_iter = main_iter.take_while(|x| *x & 0b1000_000 != 0b1000_0000);
+    println!("{:?}", simple_iter);
+
+    let mut next_iter = main_iter.take_while(|x| *x & 0b1000_000 != 0b1000_0000);
+    println!("{:?}", next_iter);
+}