Option 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 // To inner type unwrap () -> T unwrap_or (T) -> T unwrap_or_else (() -> T) -> T unwrap_or_default () -> T where T: Default expect (&str) -> T //Converting to another type map ((T) -> U) -> Option<U> map_or (U, (T) -> U) -> U

typeof for C c语言的typeof的应用： 1 2 3 #define SWAP(a, b) do { \ typeof(a) tmp = a; b = a; a = tmp; \ } while(0) 1 2 3 4 5 #define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER) #define container_of(ptr, type, member) ({ \ const typeof( ((type *)0)->member ) *__mptr = (ptr); \ (type *)( (char *)__mptr -

背景 最近发现一个很好用的系统监控命令：btop。 btop一站式实时显示cpu，memory，disk，network，processes的统

资料 The Rust Programming Language Rust Language Cheat Sheet Zero to Production in Rust This Week in Rust awesome-rust awesome-cli-rust tools and libaries cargo-asm A cargo subcommand that displays the generated assembly of Rust source code. cargo-fuzz A cargo subcommand for fuzzing with libFuzzer hyperfine A command-line benchmarking tool flamegraph sqlx yarte opentelemetry thiserror rust-clippy Serde Tokio Rocketi Rocket Diesel Rayon Actix Hyper Anyhow Thiserror PyO3 Rkyv 心法

define the tree structure 1 2 3 4 5 6 7 #[derive(PartialEq)] struct TreeNode<T> { pub value: Option<T>, pub children: Vec<Rc<RefCell<TreeNode<T>>>>, pub parent: Option<Rc<RefCell<TreeNode<T>>>>, } new tree 1 2 3 4 5 6 7 pub fn new() -> TreeNode<T> { TreeNode { value: None, children: vec![], parent: None, } } add_child 1 2 3 pub fn add_child(&mut self, new_node: Rc<RefCell<TreeNode<T>>>) { self.children.push(new_node); } del_child 1 2 3 4 pub fn del_child(&mut self, node_to_remove: Rc<RefCell<TreeNode<T>>>) { self.

说明 公式推导基于uniswap v2，不适用于uniswap v3。 非永久性损失 用户为流动性池提供流动性时，由于交易对价格变化使池内的交易对的代

Error 1 2 3 4 5 6 7 \node_modules\web3-eth-ens\lib\ENS.js:482 throw new Error("ENS is not supported on network " + networkType); ^ Error: ENS is not supported on network private at ENS.checkNetwork (\node_modules\web3-eth-ens\lib\ENS.js:482:19) at processTicksAndRejections (node:internal/process/task_queues:96:5) 原因 将web3实例作为参数，误传给函数，导致web3实例对应的内存被踩

DeBank DeBank 是一款DeFi资产跟踪和投资组合管理工具。 优点： 支持多链 不仅支持链上帐户资产也支持TVL资产 支持多种协议 支持帐号approve风险提示 缺

原则 不追求完美 解决核心问题 跳出框架，摆脱限制 从自身，事实，简单开始，多迭代

背景 加密货币历史上几次大跌： 2017年94事件 2020年312事件 2021年423事件 2021年519事件 每次大跌都验证一句话：币圈一天，人

背景 PoW和PoS作为现在最常用的两大共识算法，PoW与PoS之争已经有多年了。 下面从去中心化角度来对比两条公链： 采用PoW的以太坊 采用EP

day1 2021年1月16日 星期六 1 There is considerable debate over how we should react if we detect a signal from an alien civilisation. 翻译： 如果我们探测到了来自外星文明的信号，我们应该如何回应是一个备受争议的

背景 最近以太坊单日交易量与矿工收入均创历史新高。据THEBLOCK数据显示，4月23日以太坊网络上的每日交易量达150万，再创历史新高，在日

NFT is blooming. Naval’s insightful viewpoints about NFTs as follow: An NFT is a unique, on-chain token representing ownership of an off-chain asset. The token is backed by a social contract from its creator and a surrounding community. By assigning a unique token to a thing, its ownership (not the thing itself!) becomes programmable, verifiable, divisible, durable, universally addressable, composable, digitally secured, and easy to transfer. Bitcoin and other completely on-chain assets are provably scarce - scarcity is enforced by code and distributed consensus.

套利大行其道，那么套利是什么？ 下面这张图是一个活生生的套利案例。 套利的本质是什么？ 套利的本质是利用非对称获利 套利的竞争是发现非对称机会以及利

background 最近Telsa投入15亿美元买入了bitcoin，消息一出，bitcoin应声大涨，这事激起广泛的关注。 telsa买入bitcoin的原因

背景 最近clubhouse的邀请一码难求，自己有幸被邀请。体验一下，说一下自己对clubhouse一些想法。（Ps：由于区块链与加密货币的火

背景 首先，先看看这个新闻： 湖南益阳62岁老人投江后续：当地多家养老机构爆雷，有老人获悉后心梗去世。 由这个新闻想到中国从2018年开始了一系列

询问 who can who can help me move this box? who is who is that girl in blue? when can we when can we go hiking? When did you when did you come back? where is where is the washroom? where can I where can i find some bottled water? why do/did why did you quit your job? how did you How did you get to know each other?

The difference between stupidity and genius is that genius has its limits. We all know that light travels faster than sound. That’s why certain people appear bright until you hear them speak. The only thing that interferes with my learning is my education. Education is what remains after one has forgotten everything he learned in school. The majority of the stupid is invincible and guaranteed for all time. The terror of their tyranny, however, is alleviated by their lack of consistency.

今天哪些新领域会像2010年比特币一样的成长 twitter一个用户提出一个问题：Is there a thing today like being into Bitcoin in 2010？ 下面是Balaji S. Srin

说明 本文从软件，互联网，区块链，安全的视角谈谈开放的重要性。 软件 软件方面看几个例子吧。 首先看一下chrome浏览器，chrome浏览器首先建

前言 Ethereum作为第一个支持图灵完备的智能合约平台，同时也是最大的智能合约平台。从现在区块链应用角度来看是最重要的公链。个人认为公链的

前言 历史是一面镜子。 历史是一个任人打扮的小姑娘。 “Most history is guessing, and the rest is prejudice.” 历史告诉我们过去发生什么，启示我们现在做什么，

什么是计算思维 wiki对于计算思维定义如下： Computational thinking (CT) refers to the thought processes involved in formulating problems so their solutions can be represented as computational steps and algorithms.[1]In education, CT is a set of problem-solving methods that involve expressing problems and their solutions in ways that a computer could also execute.[2]It involves automation

背景 随着eth 2.0信标链启动以及defi的快速发展，加密货币会迎来一个新的牛市。在牛市开启之后，一定有很多新人进场。 作为一名老韭菜，简单说

问题描述 Given weights and values of n items, put these items in a knapsack of capacity W to get the maximum total value in the knapsack. In other words, given two integer arrays val[0..n-1] and wt[0..n-1] which represent values and weights associated with n items respectively. Also given an integer W which represents knapsack capacity, find out the maximum value subset of val[] such that sum of

GPT-3 GPT-3全称是"General Pre-trained Transformer-3"，对应中文翻译为：第三代通用预训练转换器。 其wiki定义

背景 由于GFW的干扰，即使科学上网方式从github下载文件，下载连接经常会被中断。由于chrome重新连接的次数有限，据说chrome重新

最近地摊经济火了，火遍了朋友圈，激活了段子手。 原因 受到疫情影响，国内与国际经济都受到很大的冲击，国内企业倒闭，减薪，缩员等现象也是时有出现。