ssrlive’s gists

ssrlive / postgresql-macos.md

Last active February 4, 2023 02:52

Getting Started with PostgreSQL on macOS

goodgeek@mypc ~ % /usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"

goodgeek@mypc ~ % brew install postgresql

goodgeek@mypc ~ % brew services restart postgresql

goodgeek@mypc ~ % psql postgres

ssrlive / coin_change.rs

Last active February 13, 2023 04:10

最小紙幣找零算法

	// 最小紙幣找零算法
	// 1. 用最大的紙幣找零
	// 2. 用次大的紙幣找零

	fn coin_change(coins: Vec<i32>, amount: i32) -> i32 {
	let mut coins = coins.iter().map(\|&x\| x as usize).collect::<Vec<_>>();
	coins.sort();
	let amount = amount as usize;
	let mut dp = vec![amount + 1; amount + 1];
	dp[0] = 0;

ssrlive / bound2.rs

Last active March 6, 2023 15:48

lower_bound and upper_bound in rust.

	use std::{cmp::Ordering, result::Result};

	/// find first index where arr[idx] >= v; assume arr is sorted
	pub trait LowerBound {
	type Item;
	fn lower_bound(&self, x: &Self::Item) -> Result<usize, usize>;
	}

	/// find first index where arr[idx] > v; assume arr is sorted
	trait UpperBound {

ssrlive / m-x.sh

Created February 24, 2023 01:48

extern memory script

	#!/bin/bash

	sudo dd if=/dev/zero of=/opt/swap bs=1024 count=2048000
	sudo chmod 600 /opt/swap # ×¢Òâ¸ü¸Ä swap ÎÄ¼þµÄÈ¨ÏÞ
	sudo mkswap /opt/swap
	sudo swapon /opt/swap

ssrlive / tun2proxy.sh

Last active July 21, 2023 06:10

script for https://github.com/blechschmidt/tun2proxy

	#! /usr/bin/bash

	# Please set the following parameters according to your environment
	BYPASS_IP=123.45.67.89
	PROXY_IP=127.0.0.1
	PROXY_PORT=1080
	PROXY_TYPE=SOCKS5

	# check if user is root
	function is_root() {

ssrlive / callback4rust.md

Last active April 25, 2023 08:50

Rust FFI for C style callback

use std::{ffi::c_void, marker::PhantomData};

struct CBProxy<F, Sig>(PhantomData<(F, Sig)>);

impl<F, A1, A2, R> CBProxy<F, fn(A1, A2) -> R>
where
    F: FnMut(A1, A2) -> R,
{

ssrlive / guard_thread.rs

Last active May 4, 2023 04:29

Guard a thread and restart it when it exits unexpectedly.

	use std::sync::atomic::{AtomicBool, Ordering};
	use tokio::{
	signal::ctrl_c,
	sync::mpsc::{channel, Sender},
	task::spawn,
	};

	static STOP_FLAG: AtomicBool = AtomicBool::new(false);

	// worker function to be executed in a separate thread

ssrlive / node_tree.rs

Last active June 16, 2023 01:42

Demo of a Group/Node tree system in rust.

	/*
	[dependencies]
	as-any = "0.3"
	erased-serde = "0.3"
	rustfmt = "0.10"
	serde = { version = "1", features = ["derive"] }
	serde_json = { version = "1" }
	uuid = { version = "1.2", features = ["v4", "serde"] }
	*/

ssrlive / mio-demo.rs

Last active September 8, 2023 08:02

Mio demo with rust

	// [dependencies]
	// mio = { version = "0.8", features = ["net", "os-ext", "os-poll"] }

	use mio::{
	event::Event,
	net::{TcpListener, TcpStream},
	Events, Interest, Poll, Token,
	};
	use std::{cell::RefCell, collections::HashMap, io::Read, net::SocketAddr, rc::Rc};

ssrlive / get_interface_info.rs

Last active September 2, 2023 03:33

GetInterfaceInfo function (iphlpapi.h)

	//
	// https://learn.microsoft.com/en-us/windows/win32/api/iphlpapi/nf-iphlpapi-getinterfaceinfo#examples
	//
	// [target.'cfg(target_os="windows")'.dependencies]
	// windows = { version = "0.51", features = [
	// "Win32_NetworkManagement_IpHelper",
	// "Win32_NetworkManagement_Ndis",
	// "Win32_Networking_WinSock",
	// "Win32_Foundation",
	// ] }