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997 views

1 answer

julia - Cannot figure out simple use of Cumulants.jl

I cannot for the life of me figure out how to use Cumulants.jl to get moments or cumulants from some data. I find the ... out how to get the first m cumulants as a vector easily....

asked Feb 19, 2021 in Technique[技术] by 深蓝 (71.8m points)

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899 views

1 answer

get - Error: Returned values aren't valid, did it run Out of Gas?

I created a mini-project with MVC and solidity contract named BankAccountContract the controller file getBalance() gives me this error ... ().then(result => console.log(result)); }...

asked Feb 19, 2021 in Technique[技术] by 深蓝 (71.8m points)

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612 views

1 answer

powershell - The input object cannot be bound to any parameters?

I'm trying to set user extension properties from a powershell code with an input coming from a CSV file. I'm ... sure not the best. Does anyone have any suggestions? Thanks!...

asked Feb 19, 2021 in Technique[技术] by 深蓝 (71.8m points)

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303 views

1 answer

Google Play Store keeps crashing on Android Virtual Device

I am running my Android app through Android Studio on the Android Virtual Device. I have tried using multiple different virtual ... what I may be missing? Thank you for your help....

asked Feb 19, 2021 in Technique[技术] by 深蓝 (71.8m points)

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329 views

1 answer

python - keyPressEvent not printing when clicking button in Calculator UI PySide2

I am beginner and following a course on Python GUIs. This time he is teaching a GUI done on QT designer and then ... = Calculadora() mi_aplicacion.show() sys.exit(app.exec_())...

asked Feb 19, 2021 in Technique[技术] by 深蓝 (71.8m points)

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416 views

1 answer

Apache Superset on Mobile

Does anyone know if you can expose a superset or chart on a mobile device? Has anyone explored it? I have researched github and stackoverflow but have not seen anything posted....

asked Feb 19, 2021 in Technique[技术] by 深蓝 (71.8m points)

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266 views

1 answer

How to write stateful dbus methods in haskell?

I'm working with dbus in haskell, and I'm having difficulties figuring out how to export dbus methods that perform stateful ... t know how to handle the types with respect to DBus....

asked Feb 19, 2021 in Technique[技术] by 深蓝 (71.8m points)

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387 views

1 answer

在linux下开机启动pm2 不成功

以下是我的pm2开机启动的服务脚本, 开机后,服务启动成功了,但是pm2却没有运行是不是我的脚本写得有问题? #!/bin/sh # chkconfig: 2345 64 36 # description: node start scripts. ### ... 箱发了一封邮件但是输入命令 pm2 l 的时候却没有在列表里发现应用在跑莫名其妙...

asked Feb 19, 2021 in Technique[技术] by 深蓝 (71.8m points)

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897 views

1 answer

node.js - Trying to send message to a specific channel with a discord bot using Discord.js

As mentioned in the title I am trying to send a message to a specific channel using a discord bot that I've built using ... 'm doing something wrong or if it's some sort of bug....

asked Feb 19, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

548 views

1 answer

安装了ECShop之后，为什么登录不了后台呢？

我用的ecshop版本是3.6 错误信息为：...

asked Feb 19, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

264 views

1 answer

python - re.findall behaves weird

The source string is: # Python 3.4.3 s = r'abc123d, hello 3.1415926, this is my book' and here is my pattern: ... re.findall give me the expected list: ['123', '3.1415926']...

asked Feb 19, 2021 in Technique[技术] by 深蓝 (71.8m points)

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243 views

1 answer

c - Inconsistent behavior of Julia ccall

I'm attempting to use ccall to interface with a Windows function (FindWindowA to be specific), but i'm getting a weird ... ) 0 Is there a way to get consistent results from ccall?...

asked Feb 19, 2021 in Technique[技术] by 深蓝 (71.8m points)

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315 views

1 answer

vue.js - How can I have single Vue component and how each contents in that can be routed by buttons of other component

I am new to Vuejs, I am looking to make my code effective just by having one vue component, and i want to specify ... send me the modified code, so that i can understand it easily....

asked Feb 19, 2021 in Technique[技术] by 深蓝 (71.8m points)

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2.1k views

1 answer

vue 组件怎么监听 getters过来的数据

vue 组件怎么监听 getters过来的数据...

asked Feb 19, 2021 in Technique[技术] by 深蓝 (71.8m points)

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419 views

1 answer

merge - Merging 2 dataframe tables by multiple columns in R

Let's say we have 2 dataframe tables: dfA has col1, col2, col3, and col4 dfB has col5, col6, and col7 if we want to ... .by(by.y, y) : 'by' must specify uniquely valid columns>>...

asked Feb 19, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

237 views

1 answer

java - Call Deflection Not Working Android Studio

I'm working on an android studio application that utilizes CallService, and my app is based off of this post: Replace ... method is not working/have a functioning example of it?...

asked Feb 19, 2021 in Technique[技术] by 深蓝 (71.8m points)

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349 views

1 answer

如何用图画的方式有效地表示多线程？

用什么图可以清晰地表示多线程？我这边主从节点加起来大概有8～10条线程，用语言描述太苍白了，而且不便于理解，很容易出现偏差。...

asked Feb 19, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

524 views

1 answer

需要做一个移动端微信页面的小游戏，脑子里比较空希望有大神小神稍微指点指点。

初步设想是用h5的canvas，使用图片一帧一帧地实现动画效果，不知道这种想法会不会有什么弊端？而且我对h5不熟悉，canvas更不熟悉，不知道从哪里着手，这两天一直在百度中找，看一些书，看一些文档，但是不系统。以前学过一点Android，做过几个Android的小游戏，不知道可不可以结合应用。希望能有大神稍微指点一下啊。。。...

asked Feb 19, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

329 views

1 answer

php 预处理stmt语句问题

我写的一个注册用户页面,然后后台用stmt预处理,查询内容.我在本地服务器全部测试好了放到阿里云虚拟主机后就无法执行stmt语句. 我本地服务器 php版本5.6 阿里云5.5 数据库用的是同一个. 代码如下就是首先查询用户注册的 ... . 本地就能正常返回.如果用户名存在就返回{"statu":3}. 如果我用普通查询服务器那边是没问题的. 在线等!...

asked Feb 19, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

570 views

1 answer

[图] webpack打包的vendor.*******.js，太大导致加载慢，我该怎么优化？

如图：请问这个该怎么优化加载速度啊？怎么减小那个vendor的尺寸？这是个小应用，用的vue-cli，图中的是构建后放在服务器上打开的效果已经用了vue的异步加载，但其中vendor.＊＊＊＊＊＊＊＊.js有六百多k，加载用了5秒，显然这是不能忍受的…… 请问大神们我该怎么优化？...

asked Feb 19, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

349 views

1 answer

前端预览图片，用Base64和objectURL哪个更好

我现在有10张图片，平均1.5mb 大小，我现在用input file一次性选中它们，并且使用img标签显示出来 ?我是把它们弄成base64好呢？还是用ObjectURL好？（运行环境仅限于Chrome最新版，不考虑其他因素）后 ... 的需求呢？或者说我把图片的数量加到100张？另外渲染和绘制工作base64要好于ObjectURL这个又要怎么理解？...

asked Feb 19, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

438 views

1 answer

侧栏菜单点击其中一项，在右侧显示如何通过js实现？

<html> <head> <meta charset="utf-8"> <meta name="viewport" content="initial-scale=1, maximum-scale=1, user-scalable=no, width= ... </ion-tabs> </ion-view> </script> </body> </html>...

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

0 votes

367 views

1 answer

avalon2 我写了一个加载的组件，怎么把组件的一个属性告诉外部啊？

avalon2 我写了一个加载的组件，我想在这个组件加载完成后，再执行另一个组件同时把这个组件中的一个属性传递给另一个组件，我该怎么把值暴露出去啊？...

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

0 votes

547 views

1 answer

Qt designer无法保存ui文件

用QT designer 编辑ui界面后保存，弹出 This file contains top level spacers. They will not be saved.Perhaps you forgot to create a layout 提示框！要怎么处理？...

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

0 votes

485 views

1 answer

master data management - Not allowing me to login into the enterlogin.jsp page after modifying login.wpcs script

In Login.wpcs script on MDM page (datamodel manager -->scripting --> Login.wpcs) I have deleted the content and saved ... the script ? Where the script is present on server? nnn...

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

0 votes

379 views

1 answer

antd中的表格如何关闭hover效果

普通的表格展示效果我觉得非常OK。但在复杂的跨行跨列表格中，主要就会存在两个问题： 1.展示效果并不流畅 2.展示的效果也并不是很美观，如下图：...

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

0 votes

208 views

1 answer

地图api距离

类似外卖网站这种，距离是通过地图api接口获取的？还是说本身数据库里应该有？...

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

0 votes

659 views

1 answer

html - Thymeleaf: concatenate expressions

I have this expression <h2 class="topmargin_0 bottommargin_30" th:text="${user.name} || ${user.age} || ' years old'" ... the app. I have this error: Could not parse as expression:...

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

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