Recent questions in Technique[技术]

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python 3.x - Creating a table based on a Pandas dataframe

import pandas as pd data = pd.DataFrame({ 'id' : [1,2,3,4], 'text' : ['Sample1', 'Sample2', 'Sample3' ... create a table in postgres using this dataframe in python as a reference?...

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

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Vue APP基于webpack的项目，它是独立的项目吗？我后台是Java的，要如何实现，跨域请求吗？大牛请教一下谢谢

问题如上，因为我是Java Web开发，刚接触VUE-cli 这种新形势。...

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

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952 views

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vue router 跳转变化之前将值传入到组件中，组件收到过渡动画的class名称

点击一个按钮，跳转router时，怎么做到，将指定的值（这个值是有2中情况的）传入到组件中，过度。...

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

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435 views

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Can ClearML (formerly Trains) work a local server?

I am trying to start my way with ClearML (formerly known as Trains). I see on the documentation that I need to have server ... and all) on a local server? My OS is Ubuntu 18.04....

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

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374 views

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esri - How to open and use a downloaded arcgis toolbox at C#

Im trying to open a toolbox from C# that doesnt exist at the esri refrences tools, I downloaded it and i can use it ... use that toolbox from C#, P.S The toolbox contains 3 tools...

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

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windows - error setting up LDAPS with AWS Managed AD - unable to download

I am trying to setup LDAPS with AWS Managed AD but am receiving an "unable to download" error when opening PKIVIEW. See ... . PS. I have also posted this question on the AWS forum...

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

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JavaScript: Sort array based on a permutation order?

I have a list of N elements with an array of three colors like this: [ { id: 1, colors: ['Red', ' ... = findDuplicates(b.colors); return colorDupsB.length - colorDupsA.length; });...

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

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VBA Excel issue when pasting charts

It's a first time I'm writing for help so sorry if any conventional errors, but I'm looking for over a month ... history that helped one guy only:) Your help would be appreciated!...

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

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javascript - The matter-js startCollision is not working

I am new to matter-js and am attempting to build a simple game using react native, react native game engine, and matter ... - circle.body.circleRadius }); }); return entities; }...

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

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528 views

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numpy - Python scipy minimize optimize not working

I'm currently working on a program which will return the loan payment schedule based on input. I've made it ... x - capital solution = scipy.optimize.minimize(calc_payment,x0=100)...

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

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438 views

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如何用echarts实现从北京到上海然后在到深圳有一个动态的迁移效果，最好给个简单的demo。

官网上看的demo都是从一个地方到一个地方，没有看到3个或三个以上按顺序迁移的，该怎么做呢...

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

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hbuilder实时位置

hbuilder能不能做到类似于美团那样，能实时知道配送员的位置信息，不需要手动刷新那种。需要什么技术或者有没有第三方的服务。目前的思路就是只能每隔一段时间提交地理位置，不打算入表，写到内存，每次采用覆盖的形式。然后另一边也是每隔一段时间读取数据，从内存读取应该快速，消耗比较低。...

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

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287 views

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javascript - Change zoom in out icon color of google map

I want to change the color of zoom in out and the fullscreen button icon gray to white. But, I can't change color ... these icon's format is SVG. is it possible to change color?...

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

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372 views

1 answer

javascript - d3-annotation + d3-zoom - Zooming without scaling

I'm new to d3. I've been looking everywhere for an example of how to do this. But essentially, I created ... the rendered annotation doesn't also get significantly large with it....

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

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232 views

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How to loop through a plain JavaScript object with the objects as members?

How can I loop through all members in a JavaScript object including values that are objects. For example, how could I loop through ... ": "billy", "your_msg": "foo equals bar" } }...

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

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245 views

1 answer

machine learning - Pytorch Resnet CNN only works when test data contains all classes

Hoping to get a hand with a weird CNN training issue. I am training a Resnet classifier to predict 4 classes of image from a ~10k ... ], device='cuda:0') 0 Loss: 0.1655 Acc: 0.9400...

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

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CSS设置的背景图片如何判断是否加载完成

用css添加一个背景图片，现在我做了一个加载动画，想在图片加载完成后隐藏，但不知道如何判断css添加的图片什么时候加载完成。...

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

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662 views

1 answer

webpack 打包 sass 样式用@import 引用其他文件夹下的样式图片路径问题

我使用webpack打包 sass文件,现在遇到的问题是我的目录结构如下: 其中variable.scss中我引入了img中的图片 arrow-in.png $color:red; .arrow-in{ display: inline-block; color: ... ,所以想问下,有什么方法解决这个路径问题,或者是有什么loader可以解决这个问题....

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

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596 views

1 answer

mongoose unique无效

var groupSchema = new mongoose.Schema({ group: { type: String, unique: true } }); 在存数据的时候，同样的value可以无限存啊...

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

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310 views

1 answer

vue+webpack+sass 用Font Awesome font无法找到

本人初学webpack，vue 请教各位大神为啥用Font Awesome webpack编译后报错，fonts找不到 webpack配置 sass中这样引入的我大概了解是font的相对路劲的问题。但是具体怎么配置，请教大神了...

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

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提交表单，参数为标签td里的值，如何做到？

<% results.forEach(function(result){%> <form action="/buy" method="get" id="second"> <tr> <td id="no"><%=result.no %></td> <td>< ... .body.no）打印出来的值是undefined 新手，如果有更好的建议请不吝赐教，谢谢 ...

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

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345 views

1 answer

python这个类中的方法到底有什么用处啊

class BaseDB: ''' BaseDB dbcur should be overwirte ''' __tablename__ = None placeholder = '%s' maxlimit = -1 @staticmethod def ... 怎么调用啊 pyspider代码 https://github.com/binux/pysp......

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

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159 views

1 answer

下列函数哪些是JavaScript的全局函数

1.encodeURI 2.parseFloat 3.setTimeout 4.eval 我看答案是234，为什么第一个不是？...

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

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342 views

1 answer

php 的password_hash 原理是什么

如题，php 中的 password_hash 加密密码时如果采用随机盐值, 那么验证密码的时候是如何确定密码对应的盐值的...

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

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358 views

1 answer

anaconda3 4.3 python 3.6 没法跑scrapy？

写了个最简单的爬虫也跑不了,在 timeoutDelay = sum(Time)这里出现 'float' is not iterable...

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

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465 views

1 answer

c# - Why I am losing bytes in data transfer through sockets in this sample?

I am trying to receive data asynchronously and store it into StringBuilder and when StringBuilder length will be above 1000 process ... e) { MessageBox.Show(e.ToString()); } }...

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

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360 views

1 answer

json就是复合js对象格式的字符串这样理解json对吗

如题，有人这样告诉我JSON的定义，google了下，没有得到想要的答案，请问这样理解是否有问题？...

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

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284 views

1 answer

Python BeautifulSoup "weird" errors

Somewhere in the mist i have tangled myself running these code gives me "weird" errors and it seems like i am ... :///ASUS-NVIDIA-GeForce-grafikkort-kylning/dp/B07489XSJP?dchild=1?...

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

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