Recent questions in Technique[技术]

0 votes

389 views

1 answer

mysql - Get data between 2 days group by with 24 + result

Table name: smart_m serial | Timestamp | mac_address | Temp 1 | 2020-12-30 07:00:00 | 12:34:56:78:00:99 | 21.2 2 | 2020-12-30 ... | 2020-12-31 07:00:00 | 12:34:56:78:00:99 | 50.5...

asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

422 views

1 answer

请问一下国内使用react-native 开发地图相关应用的时候一般用什么组件？

如题。在网上找了一下，但是没有找到相关靠谱的地图组件，请问一下各位知不知道有什么靠谱的地图组件适合react-native开发...

asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

391 views

1 answer

How can the locale and encoding set in cloudfoundry buildpack docker image built by spring boot gradle task "bootBuildImage"

When I create a docker image with a spring boot app, I see encoding problems in filenames of directories ... ="POSIX" LC_MEASUREMENT="POSIX" LC_IDENTIFICATION="POSIX" LC_ALL=...

asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

473 views

1 answer

sql - Upsert (on conflict) vs Read before Write performance

Everytime a logged in user visits one of my webpages, I add a row to a table of (user_id, page_id) to mark that ... will result in a conflict?). Which way should I be following?...

asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

645 views

1 answer

c# - 'IApplicationBuilder' does not contain a definition for 'UseWebAssemblyDebugging'

I am creating a new Client-side Blazor PWA and received the following error messages after installing a few NUGET ... packages/versions that I installed if that makes a difference:...

asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

155 views

1 answer

html select not sending information on php

<?php $servername = "localhost"; $username = "xxxxxxxx_user"; $password = "xxxxxxxxxxxx_pw"; $database = "xxxxxxxx_db"; / ... ">Uttar Pradesh</option> <option name="addr_state" v...

asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

420 views

1 answer

image - Create a geom_bar, and color each bar based on how many times the word is said by each account

I have a dataframe and I need to create a bar plot of the most frequently used words, using the ggplot function. I would ... Here's an image as an example of how it should look....

asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

555 views

1 answer

weex打开本地js后，想跳转到本地的另一js文件，但使用navigator后跳转空页面

weex打开本地js后，想跳转到本地的另一js文件，但使用navigator后跳转空页面 android开始加载js方法 public class MainActivity extends AppCompatActivity ... 9.5@aar' compile 'com.github.bumptech.glide:glide:3.7.0' }...

asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

365 views

1 answer

有什么时间插件是只有时分秒,没有是日期的吗？

只显示后面的时分秒...

asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

565 views

1 answer

dplyr - R how to mutate a new column that has the same vector size

I am trying to create a new column that converts FIPS code to the state abbreviation using library(usmap), the problem is that the new ... 0 0 0 2 51 153 2.02e13 40 0 0 0 260...

asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

454 views

1 answer

idea能不能像STS那样直接通过保存快速重启Spring Boot项目

在Spring Boot项目添加了devtools的前提下，STS只需要简单的保存文件就可以触发重启，非常方便简单但是Intellij IDEA还需要Ctrl+F9构建项目才行，而且如果使用Gradle的话会调用gradle的build任务，速度更 ... 还得重新启动守护进程，无形中浪费了几十秒时间有没有啥办法能让Gradle deamon活得久一点？...

asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

130 views

1 answer

c# - Try to get total price with id from 2 tables with Linq

I am currently struggling to create a linq statement in order to calculate the total price. I have 2 tables. BookingSet Table : ... ) { price2 = price2 + price; } return price2; }...

asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

286 views

1 answer

node.js 的socket.io如何获取客户端的ip来标记客户socket

想在server 端获得客户ip实现断线续连，发送私信的功能，问题是如何获取客户端的真实ip来标记socket？ var ChatterList=[]; io.sockets.on("connection", function(socket){ ... "); }; ) 主要问题是： newChatter.IP=?; //如何获得客户端socket的ip？...

asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

368 views

1 answer

Javascript单线程中消息队列的执行疑问

陆陆续续看了一些js单线程，事件循环和消息队列的文章，但是有一个疑问是，当event loop消息队列的时候，假设里面有ajax和settimeout两个消息，当但是settimeout是先进入消息队列，ajax是后入，但是ajax先回馈结果了，settimout ... 章好像说异步消息队列也是按顺序轮询执行的，但是明明后面的比你先反馈，应该是先执行对把？...

asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

1.4k views

1 answer

i have tried to change the port of apache in xampp but its not working?

My xampp server is not running apache and giving me the error of Error: Apache shutdown unexpectedly. 2:49:49 AM [ ... change the ports by going to config files but all in vain...

asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

609 views

1 answer

在不配置虚拟主机的情况下，如何在 nginx 上运行 laravel

如果配置了虚拟主机，比如使得 app.dev 指向 myapp/laravel/public 文件夹，此时通过配置 nginx 中的 try_files 即可正常访问 Laravel 项目里设置的路由但如果不配置虚拟主机，假设 ... 么如果不配置虚拟主机，在 nginx 中该怎么运行 Laravel 项目呢（不考虑把根目录设置到 public）？...

asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

360 views

1 answer

js基础问题reduce的使用

[].reduce.call('cbaacfdeaebb',function(p,n){ return p[n] = (p[n] || 0) + 1,p; },{}), 看到过这样的代码，不太明白工作原理 reduce通过call就能应用到string ... 没有？工作原理是？能把string换成其他类型吗？比如map js新手，希望大神能详细讲解一下 ...

asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

300 views

1 answer

eslinit规则--块语句内行首行空行尾部不空行

请问eslint规则中如何设置"块语句内行首行空行尾部不空行"？ padded-blocks padded-blocks似乎只能设置都空行，或是都不空行...

asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

639 views

1 answer

android studio - Flutter doctor shows everything OK but code doesn't compile (Basically, the IDE doesn't recognize Flutter sdk)

I just created a new project and for some reason it has compile errors thus cannot run the app. When I run flutter doctor: ... /bin/dart I did check the issue here, but no luck....

asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

218 views

1 answer

python - Segfault in tk if plotting from an audio callback

This minimum reproducible example: #!/usr/bin/env python3 from contextlib import contextmanager import pyaudio from matplotlib ... data from the callback to a rendering thread?...

asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

607 views

1 answer

vue 中使用原生 HTML 标签名命名组件的问题。

想像 iview 一样使用<Input>来命名 vue 中的组件，但是控制台会发出警告 [Vue warn]: Do not use built-in or reserved HTML elements as component id: Input 按文章所说的--聊聊 ... 是支持这种命名方式的但不知道为什么还是警告了，所以请教下该如何解决这个问题 ...

asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

543 views

1 answer

自定义相机存入相册旋转了90度如何加解决

自定义相机存入相册旋转了90度如何加解决用网上的方法判断图片是向上的,我改了代码,但是存入图片变成黑色的了,求解...

asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

241 views

1 answer

simple-line-icon配置问题

simple-line-icons配置路径报错了，看不出什么问题。这个配置正常...

asked Feb 5, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

445 views

1 answer

css - "width: 100%; max-width: 100%;" Is there a special reason to set both of these up?

img { width: 100%; max-width: 100%; } I am making a responsive website according to the tutorial. I know the ... the max-width: 100% even though they set the width: 100%?...

asked Feb 5, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

153 views

1 answer

java - Setting JDK in Eclipse

I have two JDKs, for Java 6 and 7. I want to build my project using both. Initially we only built against 1. ... my IDE preferences, but these are not what appears in the dropdown....

asked Feb 5, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

754 views

1 answer

php - Laravel 8 setting up supervisor .conf file for DDEV development

I am trying to set-up a supervisor to process a queue. I am pretty sure it has to do with the scope the ... from command line. If any additional information is needed let me know....

asked Feb 5, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

392 views

1 answer

java web 现在做搜索功能，用什么比较好呢

在做一个图片浏览的站，一张图片包含n个标签现在是分为图片一个表，标签一个表，图片-标签一个表最初做的是用like查询空格分隔出来的关键词，比如关键词男士鞋，会把所有有男士或鞋的查询出来，若是查询男 ... 最多的java版搜索引擎是Lucene，不知道它能和ssm整合并做成分页查询效果么？若是使用分词器进行分词，有什么比较合适的呢？...

asked Feb 5, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

312 views

1 answer

python+smtp发送邮件附件问题

文件是txt或者word格式的，但是要求附件发送过去是pdf格式的，smpt有没有什么参数是可以设置的，我设置了_subtype="pdf",最后附件打开会报错，说不是一个pdf文件，打不开 ... msg['To']="[email protected]" server.send_message(msg) 求解直接报filetype改成pdf也会文件报错...

asked Feb 5, 2021 in Technique[技术] by 深蓝 (71.8m points)

Categories

Just Browsing Browsing

Most popular tags