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Backbone onclick 方法提示找不到，有什么特殊写法吗

如图，method1方法应该写在js文件的什么位置，什么写法呢？...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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845 views

1 answer

Beautifulsoup Scrapping Object Selection

I am trying to scrape by Beautifulsoup and new to this, I need table rows as you see enter image description here. ... help, really appreciated, having hard time to get it done!...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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694 views

1 answer

前端做网络拨号功能

如上图，能够点击拨号，实现拨打网络电话的功能。重点是在PC端，移动端我看到网上都有很多方法。大神们，有好建议嘛！...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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999 views

1 answer

app嵌入的H5页面本地存储localStorage问题

搜索历史记录用的是本地存储，放到app会出问题吗### 问题描述...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.6k views

1 answer

android - Is it possible to run ML Kit in Robolectric unit tests?

I'm curious whether it's possible to run Google ML Kit in Robolectric unit tests. If I try, I get the following ... if I run it as an instrumented test (with AndroidJUnit4)....

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.5k views

1 answer

java - Junit Test error : org/junit/jupiter/api/extension/ScriptEvaluationException

I'm trying to run test code in springboot and it shows the error like below. I cannot understand what NoClassDefFoundError means ... it shows a red line. Anyone please help me :)...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.8k views

1 answer

js 寻找遍历后得到的ul li内img的src

一个放大镜功能引发的问题，下面的图片是好的，但是上面的图片就这样裂了，然后报错本地引入的js undefined F12发现src没有找到（不知道是不是因为这个所以报的上面的错）代码是这些 <div class=" ... 但是src3里多加几个children就报错了我就想取到这个src为啥这么难.... 拜托各位给点思路吧，感谢！！！...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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2.2k views

1 answer

想要在canvas渲染一张可自动放大缩小的图片，一个指定大小的区域，裁剪区域里的图片，再下图和代码

问题描述想要实现一个头像截图上传功能，在canvas上渲染一张图片，图片可放大缩小，再在canvas指定一个区域(红色框)， 1.不管图片放大缩小，都只截取该区域，如图中红 ... ") document.getElementById('img').setAttribute('src', url) } </script> </body> </html>...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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2.6k views

1 answer

JWT中token过期问题？

使用JWT生成token后为token设置一个过期时间（假设为30分钟）并且存在redis中，等到30分钟之后token会过期。但是如果我一直在浏览网站，那么30分钟之后token就不应该过期（过期之后就需要重新登录，这样逻辑很奇怪）。请问一下这样该怎么设计呢？...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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3.1k views

1 answer

sql - bulk delete from a many-to-many relation table based on a WHERE condition that checks ids in two lists

Assume that there is an employee table and a project table. A relationship table emp_proj contains following column: ( ... , would delete all rows that contain the concerned pairs....

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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2.2k views

1 answer

Looking for large latex file (~200 pages/1mb+) to test compression implementations

as the title suggests I'm looking for latex-specific files that are around 200 pages and 1mb+ in size. I've tried ... , or does anyone have one I could use? Thanks in advance...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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2.5k views

1 answer

document中有一个HTML和一个html？这是怎么出现的？

今天遇到这样一道题完成以下功能：任意打开一个网页如新浪或者百度，写一段js代码找到网页中所有以h或者H开头的元素，并打印每种元素的个数，如网页中含有head, hr 和 h2 元素，那么打印出类似如下的结果： { hr: ... 问题为什么会有一个HTML和一个html呢，正常代码结构中不是只应该有一个html吗？请问这个HTML是什么，怎么出现的？...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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2.7k views

1 answer

java log4j 日志

我添加了jar 包我还没有调用lib 里面的日志api 怎么就打印了日志？这几打印了下面的日志很奇怪啊...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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2.8k views

1 answer

关于vue老项目添加typescript的一个疑问

按照vue官网添加了typescript ts-loader vue-class-component vue-property-decorator等基础设施项目算是支持ts了，同时兼容老代码但是在.vue文件中用ts写新代码时，某些类型错误 ... 示同样的代码使用vscode打开，却有错误提示不想换IDE，webstorm怎么达到同样的效果...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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3.3k views

1 answer

H5 微信 Universal Link跳转app后，发送给朋友失效？

H5 微信 Universal Link点击跳转app后，返回对应H5页面，再次点击发送给朋友及分享到朋友圈失效，怎么解决？...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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3.4k views

1 answer

numpy - Plot first N number of data from txt file Python

I have a txt file with two columns having 4000 data. Now I want to plot only the first 1000 data from each column. I have used ... (x,y) plt.show() This is the part of my txt file:...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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3.8k views

1 answer

[react-grid-layout]网格布局，高度计算为什么要加上margin。

最近在使用react-grid-layout，版本号：^1.0.0 属性配置 <ResponsiveReactGridLayout layouts={GridLayouts} breakpoints={{ lg: 1200, md: 996, sm: 768, xs: ... 是比较困难的，每行的Item高度很可能都不一样，而margin又是一样的，头疼...

asked Jan 25, 2021 in Technique[技术] by 深蓝 (71.8m points)

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4.0k views

1 answer

flutter provider - Bloc isn't found in the widget tree

Because the code is to big I will try and sum it up in words. This is the latest exception: Error: Could ... used multiple Builder widgets but I am always hit by this exception....

asked Jan 25, 2021 in Technique[技术] by 深蓝 (71.8m points)

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3.7k views

1 answer

Element-ui 无限滚动 InfiniteScroll 在一次性把数据取回的情况如何使用?

一般情况是滚动触发一次,取回一部分数据,如下代码. 如果一次性把数据取回呢,如何处理 ? <template> <div id="box"> <div class="box" v-infinite-scroll="load" ... ; }) .catch(err => { console.log(err); }); } } }; </script>...

asked Jan 25, 2021 in Technique[技术] by 深蓝 (71.8m points)

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4.3k views

1 answer

PhpStorm HTTP client. Unable to pass POST params to localhost

I've just discovered to myself an PhpStorm HTTP client tool, but immediately faced unexpected problem. I am unable to send any ... 'm using: PhpStorm 2020.3.1 Open Server 5.3.7...

asked Jan 25, 2021 in Technique[技术] by 深蓝 (71.8m points)

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3.5k views

1 answer

普通用户自定义主题色是怎么实现的？

如这样的效果是怎么实现的呢？...

asked Jan 25, 2021 in Technique[技术] by 深蓝 (71.8m points)

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3.7k views

1 answer

请问实现office在线预览的方式？

麻烦推荐一下...

asked Jan 25, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

3.7k views

1 answer

java 程序报错未知原因

public String HttpForm(String Url, Map<String, Object> DataParams, Map<String, String> Headers) throws IOException { ... main(Main.java:22) Process finished with exit code 1...

asked Jan 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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3.8k views

1 answer

Echarts 如何实现右键菜单?

请教关于右键菜单的建立希望能在echarts中能右键,弹出菜单界面进行操作百度和github的issue搜索,没能找到有效的用例.根据几个零散帖子的内容没能成功复现,可能是版本原因都是echarts2/3的,现在都5了. < ... = oEvent.offsetY+20 + "px"; } ); 未能实现效果,请问哪里出错了?或者给出一个简短的例子...

asked Jan 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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4.3k views

1 answer

Creating python calculator using python handling

i've been training in python for a month now (i'm still noobish), and i'm with this project where i want to create calculator ... .txt', 'r') as f3: print(f3.read()) Thanks lads!...

asked Jan 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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3.9k views

1 answer

php - how can I fill two collection lists in laravel?

I have a Sellers collection and a Buyers collection like below: $sellers = collect([id=1 , qty = 5 , price = 100], [id=2 ... = 1, buyer_id = 2 , fill_price = 100, fill_qty = 3]);...

asked Jan 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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4.1k views

1 answer

python - Python2.7 works but Python3.x throws error

def calculate(self): normals = [] for f in self.sides: sideN= A(0.0, 0.0, 0.0) for i in range(0, len(f) ... of range I tried 2to3 but nothing is changed. What is the problem here?...

asked Jan 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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3.5k views

1 answer

el-popover通过transform缩小后位置发生偏移

el-popover也通过popper-class设置 transform: scale(0.5, 0.5)，但是设置后会发生位置偏移，请问要怎样解决？...

asked Jan 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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