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Android 11 EventSequenceValidator: IntentStarted during UNKNOWN. exception thrown at start of every activity

In Android 11 SDK 30 at the start of every activity I get a stack trace as follows: 2020-12-30 10:08:00.175 ... have never seen this until now. Note this happens on EVERY activity....

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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Postgresql Upgrade fails from version 11 to 12 with repmgr 4 to 5

On Production server we have repmgr version 4 and upgraded it to version 5. Now doing upgrade of postgresql ... ADD FUNCTION "repmgr"."am_bdr_failover_handler"(integer); Any hint?...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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iOS 深浅拷贝？

NSString *i = @"1"; NSString *j = [i mutableCopy]; NSLog(@"i=%p,j=%p",i,j); 打印地址不一样，由此可见是内容拷贝继续 i = @"2"; NSLog(@"i=%@,j=%@",i,j); 那么问题来了，为什么j的值还是1？...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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游戏服务端一般是用什么开发的？学习游戏服务端开发之前需要哪些预备知识？

像腾讯的LOL，CF，DNF，王者荣耀之类的游戏服务端都是用什么开发的？学习服务端开发之前都需要哪些预备知识？好像找了一圈发现这方面资料很少啊，只知道一个minecraft是java开发的，但是听网上别人说java的gc在服务端承载人数非常大的时 ... 戏中即使一两秒卡顿也会影响体验，所以想问问像腾讯那些同时在线几百几千万的游戏服务端都是拿什么开发的？...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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elasticsearch - Deallocate Elastic Search Memory after uninstall

I am on Windows 10 and I installed ElasticSearch from msi package and installed it as a service. I configured ... computer multiple times but still 2GB memory is still allocated....

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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reactjs - How to dispatch an AsyncThunk with the createAsyncThunk helper

I am currently trying to learn some typescript/redux/reactnative. I think I have gotten the basic concepts of how redux ... pointers or help of any kind would be much appreciated....

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python 3.x - MinMaxScaler is showing weird output on any of NumPy array

I am having a numpy array that you can get by the folowing lines of code: import pandas as pd import numpy as np import matplotlib.pyplot as plt ... . 0. 0. 0. 0. 0. 0. 0. 0. 0.]]...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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关于 throttle 函数的问题

function throttle(fn, wait) { let timer; return function (...args) { if(!timer) { timer = setTimeout(() => { timer = null; }, wait); return ... 可以可以详细给我讲讲这个函数的实现原理和过程，我有点似懂非懂，谢谢！...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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apache spark - In python 3.5.2, how to elegantly chain an unknown quantity of functions on an object than changes type?

Introduction I am not very certain the title is clear. I am not a native english speaker so if someones has a ... more elegant solution or any built-in python solution for this....

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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redis编译报错：cannot find -lgcc_s

经查，在/usr/lib下没有libgcc_s.so文件，使用yum install libgcc_s-dev也找不到对应的安装包: [root@localhost redis-3.2.8]# yum install libgcc_s-dev 已加载插件 ... 了libgcc_s.so，软连接到了lib64目录下，而且此链接并无失效，不知道怎么解决了...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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express 路由怎么传递或者接收到node内置模块fs读取文件中的内容？

网页用的是express，然后用fs读取了一个test.txt文件的内容，现在想把这个内容显示到页面中，那个路由怎么传值啊？麻烦告知相关资料，我查查看谢谢了比如我在app.js里写了 fs. ... ); } console.log(data.toString()); }); 怎么把这个data这个值传到路由routes的text_info.js里？...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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javascript - setAttribute is not working when i tried to set disabled attribute

I have developing a simple wizard form in which the content is divided into four section. I have written CSS to show ... or remove any attribute. Please help me to resolve this....

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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installation - Unable to accept the privacy policy from Pycharm on Raspberry Pi

ScreenshotI have installed PyCharm(2020.3.1) on my Raspberry Pi (Kuhnbus RevPi3). When I start PyCharm the privacy ... with PyCharm on the Pi? Thank you for your suggestions....

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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r - Rendering of Devanagari font while using ggplot2

here is the reproducible example library(ggplot2) library(showtext) ## Sahitya font for Devanagari characters font_add_google("Sahitya" ... should be ????? (meaning is friend)...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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How to delete a line in a file such that the contents below the line should follow the contents above the line immediately in java?

I have the code for how to delete a line in a file but after the delete operation is performed there is a new blank ... 1 Line 3 The empty line in between is not getting deleted...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python打包如何解决 UAC 权限问题？

写了一个pyqt的程序， win7下拖拽正常。但Win10下文件拖拽不进来。百度到的答案是权限过高，需要降低程序权限。我是用的管理员权限运行的。怎么才能降低权限？打包用的pyinstaller...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - making 2D array from csv file

I made this code based on the suggestion from Ted. I want to read data from csv file and load the data on data array. The ... std::cout << "failed extracting data from file "; } }...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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没有苹果Mac电脑怎么上传APP？

开发了一个APP，但没有苹果机，可以在Windows系统下直接上传的方法吗？...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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关于内部函数调用对象的问题

function Person(name){ var name=name; function getName(){ return name; } getName(); } Person("Nicholas"); 在全局作用域中，调用Person( ... getName is not afunction ???这是否能够说明，window不能调用该方法呢？？...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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javascript - Method IlluminateValidationValidator::validateVideo does not exist

i′m traying to upload a video with dropzone, i did method in controller, view, model, trait, etc... But when i call ... for all help, i don′t know why does this happen. Thanks...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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实现CPU与外部设备并行工作的硬件设备是？

1.中断机构 2.外部设备结构（通道、控制器等） 3.通道和中断 4.多总线...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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textarea控制字数的正则怎么写，要求允许换行

需求：textarea中允许输入各种字符，且可以换行，字数控制在500内我写的正则是 /^.{0,500}$/ 现在遇到的问题是用户回车后，他就报超过500字在线等，多谢 <body> <textarea name=" ... (){ if(!re.test($(this).val())){ alert(); } }) </script> </body>...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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js和jquery怎么获取点击链接的url？

点击一个超链接，怎么获取到它的url呢？...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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对话框如何正常关闭？

在对话框中这个类中，如何在自己的成员函数中把自己关掉（正常退出），隐藏也可以哦。开发环境是wxpython。简单点说，就是怎么正常退出。用destroy函数会报错。代码如下： if registration[0:5] == '01:01': self.message_dia('恭喜你，注册成功！现在输入账号密码即可登陆') self.Destroy()...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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Threads in React Native

I'm trying to do a simple app in React Native but I can't find much on the web about threads. All I needed to ... a text file with an interval of 10 seconds. Anyone has any idea?...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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求教一个关于setTimeout的问题

有一个地方不是很理解，如图所示 settimeout是异步执行的，而each是同步执行。被循环的对象有6个子集合，为什么最后在控制台输出的是对象的6个子集合，而不是输出6次这个对象的最后一个子集合？按理说在执行到settimeout的时候循环不是已经指向最后一个子集合了吗？控制台的输出结构如下...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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vuejs中计算属性

就是关于vuejs的官方文档中，计算属性中说道 Date.now() 不是响应式依赖那这个函数的意思是在{{ now }}中不会改变吗？...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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JAVA找不到主类

使用 java 找不到主类提示信息: 错误: 找不到或无法加载主类 cn.xxx.cofood.user.main.Server "C:Program FilesJavajdk1.8.0_121injava" - ... 已经加入了 classpath 而且该类的 package 为 cn.xxx.cofood.user.main.Server...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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