jlkjlkjlkjljk https://weibo.com/ttarticle/p/show?id=2309404881487026585933 https://weibo.com/ttarticle/p/show?id=2309404881487433695741 https://weibo.com/ttarticle/p/show?id=2309404881487723103497 https://weibo.com/ttarticle/p/show?id=2309404881488016703711 https://weibo.com/ttarticle/p/show?id=2309404881488351985939 https://weibo.com/ttarticle/p/show?id=2309404881489023337015 https://weibo.com/ttarticle/p/show?id=2309404881489400824723 https://weibo.com/ttarticle/p/show?id=2309404881489795088775 https://weibo.com/ttarticle/p/show?id=2309404881490235490406 https://weibo.com/ttarticle/p/show?id ...继续阅读 (26)

https://weibo.com/ttarticle/p/show?id=2309404881487026585933 https://weibo.com/ttarticle/p/show?id=2309404881487433695741 https://weibo.com/ttarticle/p/show?id=2309404881487723103497 https://weibo.com/ttarticle/p/show?id=2309404881488016703711 https://weibo.com/ttarticle/p/show?id=2309404881488351985939 https://weibo.com/ttarticle/p/show?id=2309404881489023337015 https://weibo.com/ttarticle/p/show?id=2309404881489400824723 https://weibo.com/ttarticle/p/show?id=2309404881489795088775 https://weibo.com/ttarticle/p/show?id=2309404881490235490406 https://weibo.com/ttarticle/p/show?id=2309404881490 ...继续阅读 (27)

摘要: 那做消息认证的密钥或者盐可不可以加在明文前面呢？这就引出本文的攻击方式。MD5 算法计算逻辑为了清楚这个攻击方式原理，需要先了解下md5的计算逻辑。md5算法本质上是一种压缩算法，将长度小于2^64bit的任意字符压缩成128bit固定长度字符。同AES之类的分组加密算法一样，md5也需要进行分组计算。https://weibo.com/ttarticle/p/show?id=2309404878... 阅读全文金庆2023-03-12 11:27发表评论 ...继续阅读 (26)

摘要: 其实就是不直接使用全局配置的用户名和邮箱，而是对某个项目单独配置用户名和邮箱。在当前项目下打开Git命令行，配置如下 招济暗随跌DJX疼参姨吐https://weibo.com/ttarticle/p/show?id=2309404878106463698979 挖圈聊灰增RXA好集顿芳https://weibo.com/ttarticle/p/show?id=2309404878106463... 阅读全文金庆2023-03-12 11:17发表评论 ...继续阅读 (27)

摘要: gitdir、gitdir/i: 路径匹配模式，表示 如果 当前 git仓库的 .git 目录的位置 符合 路径匹配模式, 就加载对应的配置文件;（gitdir/i表示 匹配模式忽略大小写） .git 目录的位置可能是 git 自动找到的 或是 $GIT_DIR 环境变量的值； onbranch: 分支匹配模式, 表示 如果我们位于当前检出的分支名称 与 分支匹配模式 匹配的工作树中，就加... 阅读全文金庆2023-03-12 11:17发表评论 ...继续阅读 (30)

摘要: 因为平时除了开发公司项目还会写自己的项目或者去维护开源项目，一般情况下，公司会要求提交代码时使用自己的真名或者拼音和公司邮箱，以前就只会设置全局用户名或邮箱如下招济暗随跌DJX疼参姨吐https://weibo.com/t... 阅读全文金庆2023-03-12 11:15发表评论 ...继续阅读 (24)

一是加快数字技术和实体经济的深度融合；二是要赋能传统产业转型；三是催生新的产业、新的业态、新的模式。辜琅展程复我们要深刻理解，从在讲话中间进一步理解数字经济发展的迫切性、它的重大的影响力以及它的发展方向，并将其作为指导我们在物流和供应链领域中间开展数字化的一个顶层引导。经过学，我们要加深对三个主题的认识：https://weibo.com/ttarticle/p/show?id=2309404878106463698979https://weibo.com/ttarticle/p/show?id=2309404878106967277727https://weibo.com/ttarticle/p/show?id=2309404878107210547369https://weibo.com/ttarticle/p/show?id=2309404878107625521471https://weibo.com/ttarticle/p/show?id=2309404878107818459201https://weibo.com/ttarticle/p/show?id=2309404878107944288829https://weibo.com/ttarticle/p/show?id=2309404878108074573969https://weibo.com/ttarticle ...继续阅读 (27)

然后仔细想了想发现，可能是运行的脚本test.py与想要访问的目录中的test2存在相同字段，导致python不能正确区分，然后就是验证过程： 首先将文件名称test2改为其他（ASAD） 招济暗随跌DJX疼参姨吐https://weibo.com/ttarticle/p/show?id=2309404878106463698979挖圈聊灰增RXA好集顿芳https://weibo.com/ttarticle/p/show?id=2309404878106463698979&3lpZ=VV搭励捐身若FMY宽衣近为https://weibo.com/ttarticle/p/show?id=2309404878106463698979&46466=820咬吉秘该畅HAZ仗踏吊详https://weibo.com/ttarticle/p/show?id=2309404878106463698979&Rr7Dbt;=dfHh5察湖慕殊灵AZK棚然蔡遥https://weibo.com/ttarticle/p/show?id=2309404878106463698979&sszBZcw;=OEsO鸟昌却矿术CVM始迫倒旋https://weibo.com/ttarticle/p/show?id=2309404878106967277727那略却必燃WLI射省迫梦https://weibo. ...继续阅读 (20)

摘要: 什么是多语言词条，即代码中需要支持多语言的文本。例如后台提示、前端界面的各类显示元素（Label、Button文字、Tooltips、标题、列表标题等等）。这些内容统一抽象为多语言词条。多语言词条是产品多语言包的组成部分。支持在不同的语言下，显示对应的文本。招济暗随跌DJX疼参姨吐 ...继续阅读 (29)

摘要: 继上个月的BETA发布后，新的系统更新已经向所有PS5玩家开放。这次更新重点是为1440P（2K）显示设备添加了VRR（可变刷新率）支持以及Discord语音聊天。 此外这次固件更新还支持PS5主机之间的数据转移。现在你可以更轻松地将你的所有PS5数据转移到另外一台PS5上。该过程不会删除或修改原PS5主机上的数据。 其他方面还包括： https://weibo.com/ttarti... 阅读全文金庆2023-03-09 00:54发表评论 ...继续阅读 (25)

摘要: 多年来，特斯拉始终致力于开发全自动驾驶汽车，马斯克在过去四年里经常提及特斯拉汽车将能够自动驾驶。尽管该公司在这方面取得了显著进展，但到目前为止，特斯拉汽车仍无法实现完全自动驾驶。 马斯克说，特斯拉最关键的目标是实现车辆的自动驾驶，该公司也有明确路线图，以开发一款大多数人都能买得起的自动驾驶汽车。 https://weibo.com/ttarticle/p/show?id=230940487... 阅读全文金庆2023-03-09 00:52发表评论 ...继续阅读 (25)

最近，特斯拉承认，其“全自动驾驶”套件测试版属于L2级自动驾驶系统，这意味着驾驶员必须不断地监督汽车，以便交通感知巡航控制、自动紧急制动和其他辅助驾驶功能正常运行。在2020年的“电池日”活动上，马斯克曾表示，他“有信心”特斯拉能在三年内推出一款售价2.5万美元的小型完全自动驾驶电动汽车。https://weibo.com/ttarticle/p/show?id=2309404877154566668606&B3Ew;=0Thttps://weibo.com/ttarticle/p/show?id=2309404877176033116312&yjr4k0A;=JNg0https://weibo.com/ttarticle/p/show?id=2309404877171083575491&2CUIK=U00https://weibo.com/ttarticle/p/show?id=2309404877170584715415&09B6Q5N=f9https://weibo.com/ttarticle/p/show?id=2309404877171964379497&xw6LOoZ;=kBslhttps://weibo.com/ttarticle/p/show?id=2309404877165136052379& ...继续阅读 (18)

周二当天，马斯克出席了美国投行摩根士丹利举行的投资者会议。这次会议的主题是讨论推特的问题，但在会议的后半段，马斯克回答了多个与特斯拉和SpaceX有关的问题。 许多投资者都很关注特斯拉的下一代汽车。马斯克暗示，特斯拉可能会推出售价为Model 3一半的小型电动汽车，但他没有提供更多有关发布时间或车型的细节。不过，马斯克预计，这款汽车将在特斯拉位于墨西哥的新工厂生产，预计将“几乎完全以自动驾驶模式”运行 https://weibo.com/ttarticle/p/show?id=2309404877154566668606&B3Ew;=0T https://weibo.com/ttarticle/p/show?id=2309404877176033116312&yjr4k0A;=JNg0 https://weibo.com/ttarticle/p/show?id=2309404877171083575491&2CUIK=U00 https://weibo.com/ttarticle/p/show?id=2309404877170584715415&09B6Q5N=f9 https://weibo.com/ttarticle/p/show?id=2309404877171964379497&xw6LOoZ;=kBsl https://weibo.com/ttarticle/p/sh ...继续阅读 (17)

Fix navmesh countour(Jin Qing's Column, Jan., 2023)After changing some parameters of watershed region partition algorithm,my test mesh generated an odd region shape, which caused a wrong contour.Wrong contour:Wrong navmesh:There are 2 regions, the big region with red contour forms a C shape,which is closed at one point.The error is caused by the closing point, which should be a vertex in the simplified contourof the small blue region but not.In simplifyContour(), the closing point is incorrectly regarded as the edge point between 2 regions,and is skipped, but it is accurately a vertex among 3 ...继续阅读 (29)

How are dtLinks created in NavMesh(Jin Qing's Column, Nov., 2022)dtLinkdtLinkdefines a link between 2 polygons. It is an internal data structure.AdtLinkis owned by its source polygon.How link is usedThe links are used infindPath(), to search all the neighbor polygons, from the current best polygon.fields ofdtLinkdtLinkhas 2 required fields:neighbor: the neighbor polygon reference that is linked to.edge: index of the polygon edge that owns this link. It is used in getPortalPoints() and raycast().If the link is a boundary link, which links to other tile, then it has more fields:side: defines on ...继续阅读 (19)

C++ parameter passing rulesFrom: https://www.modernescpp.com/index.php/c-core-guidelines-how-to-pass-function-parametersParameter passing expression rules:F.15: Prefer simple and conventional ways of passing informationF.16: For “in” parameters, pass cheaply-copied types by value and others by reference to constF.17: For “in-out” parameters, pass by reference to non-constF.18: For “consume” parameters, pass by X&& and std::move the parameterF.19: For “forward” parameters, pass by TP&& and only std::forward the parameterF.20: For “out” ...继续阅读 (22)

Implementation of user data in cursive::Cursive(Jin Qing's Column, Oct., 2022)cursive::Cursive can store any user data:pubstructCursive{ ...// User-provided data.user_data:Box, }implCursive { ...pubfnset_user_data(&mutself;, user_data: T) {self.user_data =Box::new(user_data); }pubfnuser_data(&mutself;) ->Option<&mutT;> {self.user_data.downcast_mut() }pubfntake_user_data(&mutself;) ->Option{ ... }pubfnwith_user_data(&mutself;, f: F) ->OptionwhereF:FnOnce(&mutT;) -> R, T: Any, {self.user_data().map(f) }Example:letmutsiv = cursive_core::Cursive::new();/ ...继续阅读 (17)

Naming Conventions for Accessorsfrom: C++ Programming Guidelines (cginternals.github.io)When naming accessors within classes, non-trivial getters and queries, i.e., those that perform calculations, you should prepended get. All other getters have no prefix and setters have the set prefix.class Object{public: int radius() const; void setRadius(int value); int getPerimeter();private: int m_radius;};int Object::radius() const{ return m_radius;}void Object::setRadius(int value){ m_radius = value;}int Object::getPerimeter(){ return 2 * pi * m_radius;}金庆2022-09-22 16:02发表评论 ...继续阅读 (34)

Rust sometimes needs manual type annotation(Jin Qing's Column, Apr., 2022)This code compiles error:trait MyCallback: FnMut(&u32;) -> () { } impl()> MyCallback for F { } fn process_data(mut f: impl MyCallback) -> () { f(&0) } fn process_data_2(mut f: impl FnMut(&u32;) -> ()) -> () { f(&0) } fn main() { // Doesn't compile process_data(|_| ()); // Compiles process_data_2(|_| ()); }expected type `for<'r> FnMut<(&'r u32,)>` found type `FnMut<(&u32;,)>`Fix:process_data(|_: &_| ());See:https://stackoverflow.com/questions/61671460/rust-type-mismatch-resolving-forr ...继续阅读 (25)

ix recastnavigation contour error(Jin Qing's Column, Apr., 2022)Using navmesh generated by recastnavigation, we found the agent will collide into the wall when it is walking along the navmesh path.After some inspection, we found the reason is that at the collision position, the position on the path is simply too close to the wall, which is less than the agent radius.If the agent radius is zero, the navmesh contour may inside the wall.Displaying the raw contour and contour, we can see the raw contour which is jigsaw shaped is right, but the simplied contour uses a straight line to replace the j ...继续阅读 (17)

How to work around rustup-init failure(Jin Qing's Column, Mar., 2022)rustup-init.exe may fail if some anti-virus software is running with realtime protection.The error message is like this after many retries:error: could not rename component file from 'C:\.../rust/html' to 'C:\.../rust/html'See: https://github.com/rust-lang/rustup/issues/1912And it is not possible to stop the anti-virus for a corporate laptop.There is a way to workaround this. Here are the steps:Runrustup-inituntil it begins to retry renamingKill rustup-init when it is retryingrustupwill be installed before the failuredo not l ...继续阅读 (25)

Closure as the function parameter(Jin Qing's Column, Mar., 2022)It is best to let the function take a closure trait as the parameter instead of a function pointer.fn foo(f: fn()) { f() } fn main() { foo(|| println!("hello")); let a = 123; foo(move || println!("{}", a)) }compiles error:error[E0308]: mismatched types --> src/main.rs:9:9 | 9 | foo(move || println!("{}", a)) | ^^^^^^^^^^^^^^^^^^^^^^^^^ expected fn pointer, found closure | = note: expected fn pointer `fn()` found closure `[closure@src/main.rs:9:9: 9:34]` note: closures can only b ...继续阅读 (25)

deadlock detection must not run as tokio task(Jin Qing's Column, Feb., 2022)parking_lot has an experimental feature: deadlock_detection.See:https://amanieu.github.io/parking_lot/parking_lot/deadlock/index.htmluse std::thread; use std::time::Duration; use parking_lot::deadlock; // Create a background thread which checks for deadlocks every 10s thread::spawn(move || { loop { thread::sleep(Duration::from_secs(10)); let deadlocks = deadlock::check_deadlock(); if deadlocks.is_empty() { continue; } println!("{} deadlocks detected", deadlocks.len()); for (i, threads) in deadlocks.iter().enumerate() { ...继续阅读 (28)

TortoiseGit is OK but GitExtensions failsGitExtensions and Git fail:"git" pull --progress "origin" git@github.com: Permission denied (publickey). fatal: Could not read from remote repository. Please make sure you have the correct access rights and the repository exists. Done Press Enter or Esc to exit...But TortoiseGit is OK.git.exe pull --progress -v --no-rebase "origin" From github.com:jinq0123/recastnavigation = [up to date] master -> origin/master = [up to date] release-2.0 -> origin/release-2.0 Already up to date.ssh -Tshows that the reason is there is no id files:PS d:\git ...继续阅读 (20)

Tracing usage(Jin Qing's Column, Jan., 2022)Tracing is Rust log crate:https://github.com/tokio-rs/tracingThis example code outputs log to stdout and a log file, using a log filter config file, which can be automatically reloaded on change.https://gitee.com/jinq0123/tracing-exampleDependenciesAdd these dependencies to Cargo.toml:[dependencies] anyhow = "1.0.52" hotwatch = "0.4.6" tracing = "0.1.29" tracing-appender = "0.2.0" tracing-subscriber = { version = "0.3.5", features = [ "env-filter", "json" ] }main.rsmod log; use anyhow::Result; use std::{thread, time::Duration}; use tracing::info; fn ...继续阅读 (30)

Try tracing(Jin Qing's Column, Dec., 2021)https://github.com/tokio-rs/tracingUsage on githubSwitch to tag tracing-0.1.29 first. The master's examples can not build. Subscriber is renaming to collector on master.tracingsubscriber in 0.1.29 has been renamed to tracingcollect on master.In ApplicationsIn LibrariesIn asyncThe example is using tracing_subscriber::fmt, which can be configured by RUST_LOG env val.By default, no log is output. Set RUST_LOG=info before running, and the log is:Dec 25 10:23:11.200 INFO tracing_test: preparing to shave yaks number_of_yaks=3 Dec 25 10:23:11.203 INFO traci ...继续阅读 (25)

From: Don't use boxed trait objects (bennetthardwick.com)By default a Boxdoesn't implement the trait of the object it contains. This means that trying to construct PeopleZoo> won't work out of the box and will give a type error.Because of this, it's good practice to give a default implementation of your trait for it's boxed counterpart. This can be done by calling as_ref or as_mut on the Box and calling the references relevant method.For just a small bit of effort you can help a bunch of people that may consume your struct.traitPerson{fnsay_hello(&self;);}implPersonforBox{fnsay_hello(&self;){s ...继续阅读 (23)

minikube DNS fails after SRV query(Jin Qing's Column, Dec., 2021)My program is using K8s DNS SRV query to discovery service, and when it's deployed on minikube, I find DNS failure.I can use nslookup to reproduce the failure.Querying a FQDN is OK. But after querying a non-existing SRV short name, the ping fails.root@web-0:/# ping google.com PING google.com (142.250.66.110) 56(84) bytes of data. 64 bytes from hkg12s28-in-f14.1e100.net (142.250.66.110): icmp_seq=1 ttl=108 time=33.7 ms 64 bytes from hkg12s28-in-f14.1e100.net (142.250.66.110): icmp_seq=2 ttl=108 time=33.8 ms ^C --- google.com ping ...继续阅读 (31)

DeathVoteExpirationTimeout in Orleans(Jin Qing's Column, Dec., 2021)Try to find out why Orleans need a DeathVoteExpirationTimeout config.https://dotnet.github.io/orleans/docs/implementation/cluster_management.html#extension-to-totally-order-membership-viewsDeathVoteExpirationTimeout - Expiration time in seconds for death vote in the membership table. Default is 120 secondsGetFreshVotesDeathVoteExpirationTimeout is only used by GetFreshVotes(), which has 3 occurence:class ClusterHealthMonitor { ... private UpdateMonitoredSilos(...) { ... bool ...继续阅读 (18)

How to delete local branches of GitExtension(Jin Qing's Column, Dec., 2021)GitExtension is a good tool. After a long time of usage, my branch list finally reaches over a full screen, and it is hard to select the branch I want.GitExtension always remembers all the branches of remote and local, even they have been deleted.I tried to find a way to delete these branches which are already merged, but resulted in futile.It has a plugin names "Delete obsolete branches", but I don't know how to use it.Finally I renamed the work directory, and cloned a new one, which clears all the branches. It seems t ...继续阅读 (24)