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Recent questions in Technique[技术]
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如何用命令行开启数据节点
官方手册上看到的关于启动数据节点的方式是,进入到localhost:8848控制节点的web页面,通过页面启动. https://github.com/dolphindb/... 上述链接中给出可以在控制节点通过 startDataNode([" ... dolphin进入命令行界面启动数据节点,命令是怎样的,就像类似启动控制节点和代理节点一样?...
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Dapper typehandler when returning dynamics
This does not work: public class DateTimeHandler : SqlMapper.TypeHandler<DateTime> { public override DateTime Parse( ... typehandlers in dapper work when querying as dynamic?...
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vue初学,如果在控制台中发现如下错误,我应该怎么看出是哪部分代码错误
各位如何代码错误,是怎么在代码中发现错误的...
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c# - Cannot generate token in Asp WebApi, XMLHttpRequest has been blocked by CORS policy
friends I am new to Asp.net WebApi, I was trying to send a post request to generate a token from my Google Chrome ... a token from the WebApi it gives me the above-mentioned error....
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priority queue array里面怎么添加一个二维坐标和修改它的removeMin方法?
priority queue中的add方法是[boolean add(E element):],怎么加一个(x,y)元素进去,同时修改它的removeMin方法!...
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NXP board with android image - android studio debug adb over network - stuck on install
I have an NXP (imx8 mini) processor, installed with an android 10 verified prebuild image. I'm trying to debug a new ... could possibly be the problem and how can I make it work?...
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Jan 27, 2021
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android - Drawable with more than two colors in XML?
How to achieve this in drawable in XML android? Bottom is transparent....
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php - PHPMailer Laravel issue
I am having an issue using PHPmailer class in laravel ,sometimes the email is sent and in very rare case its not sent but after ... = 'Hey'; $mail->AltBody = ''; $mail->send();...
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ggplot2 - How can I study the relationship between these two variables in R?
I am trying to analyse the relationship between unemployment rate and crime rate across 9 regions in England. Here ... Crime_occurrencies,color='Trend', group=1), data=crime_count)...
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r - ggplot kernal density plot lines overlapping improperly
The colors in my density plot are wrong! I can't figure out why. Here is my data: https://pastebin.com/0jqHgvxx data %>% ... )) max(a$y) max(a$x) [1] 0.0002832889 [1] 162414.6...
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Jan 27, 2021
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How do I change the filename of the Junit XML report that Nightwatch.js generates?
I have a Nightwatch.js test suite running. When it completes, I've configured the output directory using the output_folder ... this configuration? I can't find any such options....
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android - Drawing to Surface from JNI while moving SurfaceView around
In my application I have a SurfaceView in my Activity layout so its surface is not affected by any Fragment lifecycles. I ... KitKat (4.4.2). Any help is highly appreciated....
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electron-vue 热更新后 自动跳转应用窗口功能怎么关闭?
使用了 electron-vue 脚手架 应该是自动安装了热更新模块, 导致每次代码编辑到一半 然后自动跳转到最新的应用窗口 每次都要切换很麻烦...有没有 关闭这个跳转应用窗口功能的....求大佬...
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社交平台中根据用户偏好设置,每天推荐符合条件的用户?
很多社交平台,都有这步功能: 1.根据用户偏好设置,每天 8点 推荐符合条件的用户 2.当数据库里查询不到满足条件的人时,会自动扩大范围查询 3.每天出现重复的人的几率很小 如图例: 有小伙伴们知道这个业务逻辑怎么实现不?后端的数据表结构怎么设计呢? up!...
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antd的treeSelect组件,怎么添加横向滚动条?
antd的treeSelect组件,怎么添加横向滚动条?...
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Jan 27, 2021
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javascript - HTML onclick event doesn't work with parameter
When I click my button, which should make things visible and invisible, the whole website disappears. What I was trying to do ... " onclick="open(1)">More details</button> </div>...
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Jan 27, 2021
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spring boot - QueuesNotAvailableException: Cannot prepare queue for listener. Either the queue doesn't exist or the broker will not allow us to use it
After updating Rabbit MQ version to 3.8 from 3.7 we start getting the below exception on micro service start up we are ... rabbitmqctl set_permissions -p / test "." "." ".*"...
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swoole channel pop阻塞问题
PHP Version 7.2.22 (cli) (built: Sep 11 2019 18:11:52) ( NTS ) swoole Version => 4.4.12 go(function(){ $chan = new SwooleCoroutineChannel(1000 ... 是值是-1 永远不超时,这个是如何理解呢,是代表永远都不会阻塞了么...
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Rust-Wasm 向 Vue3 传递函数,并绑定到dom事件上
本人想通过由 Rust 语言 写的事件函数经过编译成 Webassembly 然后给 Vue3 的事件绑定函数使用 Rust 语言使用的包为 wasm-bindgen 编译工具为 wasm-pack 编译命令:$ wasm-pack build --target ... "); 是可以被绑定上, 但我是想使用这个事件参数,不知道怎么解决,希望有解决方案...
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关于js类型转换的问题
[] == {} // false 这是为什么呢? 另外 {} == [] // error 直接报错...
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Jan 27, 2021
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Which certificate and key does Kubernetes use to sign CertificateSigningRequests?
I was trying to automate the process of signing Kubernetes certificates for new users. The official documentation (here) ... Any idea what I am missing? Thanks in advance!...
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Which
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Input data is not being loaded into registers - issues only in post-synthesis timing simulation [VHDL][Vivado] (SOLVED)
What this is I'm trying to create a simple FIR filter. What I'm going to present you may not exactly be ... some improvements for my code in addition to the problem solution!...
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Jan 25, 2021
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r - How to change scaling in color key in heatmap.2?
Is there a way to change the color key scale so that values are binned by quantity? For example I have 15 values ... which is value 1) is centered. The actual heatmap is fine....
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Jan 25, 2021
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Create Microsoft Office Wordart with Python
I need to create a lot of wordart for a project I am working on old 90s wordart from Microsoft Office. I ... library to be used or an alternative method? Thanks in advance!...
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Jan 25, 2021
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javascript - How to get response from a GET method google maps API?
I want to hit this API and get its response in JSON, but unfortunately I am getting an error in console. Here ... on the requested resource. Can someone please help me with this?...
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Jan 24, 2021
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networkx绘图 节点标签文字超出画布范围
如图所示,该如何解决,网上搜了好多方法,都不行,想把文字显示全...
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android 的神秘内存泄露
下面这种内存泄露如何分析呢?求大神告知 ┬─── 2020-12-28 14:06:45.065 19720-26550/com.clean.apple.app ... instance of androidx.appcompat.view.ContextThemeWrapper, not wrapping known Android context...
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php - CORS: header is present but "if" statement negates the header
I'm working on a pretty simple application. Here's the overview: I've got a web form where the URL contains ... -Control-Allow-Origin' header is present on the requested resource....
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Jan 24, 2021
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