Recent questions in Technique[技术]

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ios - Question about .gesture(drag gesture) in swift ui

I am trying to detect when this text view has been swiped on. The code compiles fine, but I am not able to trigger the ... a lot for any help. This has been stumping me for weeks....

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

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c - I can't modify a variable in a function so when it return to the main the condition of while is never satisfied

Basically i want the variable 'End' to control the while loop. In the while loop there is a function called to check ... to use pointers. The variable End was int End = 0;...

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

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756 views

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audio队列播放

各位，，有没有谁写过语音队列依次播放的。。项目要做语音提示，，后台会推送消息，，我播放语音，，但是同一时间推送多条就需要依次播放。。请问怎么实现...

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

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855 views

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sql - Comparing time difference for every other row

I'm trying to determine the length of time in days between using the AR_Event_Creation_Date_Time for ... By Borrower_Number), AR_Event_Creation_Date_Time) Diff FROM Control_Mail...

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

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967 views

1 answer

DolphinDB创建内存表时报错：std::bad_alloc

在使用DolphinDB创建一个内存表时，执行如下代码： appendRows = 100000000 dateRange = 2010.01.01..2018.12.30 ints = rand(100,appendRows) symbols ... 06.400: executing code ... std::bad_alloc 请问是哪里出问题了？...

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

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1.2k views

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nuxt2.x 开发环境在IE11下报“对象不支持“entries”属性或方法“错，请问下大家怎么解决呢？

对象不支持“entries”属性或方法有些页面又可以正常打开。...

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

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1.3k views

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请问这种格式的字符串是十六进制还是什么呢？在node中，如何将它转化为base64呢？

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

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1.4k views

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ggplot2 - R Plot Bars are disappearing in grid.arrange/plot_grid

I have a problem with bars from my plots disappearing when I combine multiple plots. Here is the code I′m using: ... and maybe know a solution or a workaround for that problem?...

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

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1.7k views

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pip install dolphindb一直提示找不到

为什么一直找不到,其它电脑可以正常安装. ERROR: Could not find a version that satisfies the requirement dolphindb (from versions: none) ERROR: No matching distribution found for dolphindb...

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

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2.0k views

1 answer

Condensed mutltiple if condition is equal to something in python

I try to select keys and values in a json file and calculate average values. If a key is equal to a ... == something conditions and calculate average values based on models ?...

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

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2.4k views

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python - How to bind mouse clicks to functions in all windows in Tkinter

I am trying to bind the middle mouse click to a function: root = Tk() def leftclick(self): print("Yep!") root ... , however only on the Tkinter window, any ideas for other windows?...

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

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2.4k views

1 answer

关于 import export 循环依赖的问题

关于 ES6 Module 的循环依赖机制有个小问题，关于 export default 的 //a.mjs import bar from './b.mjs'; function foo(invoker) { console.log(invoker + ' invokes ... 循环依赖的一些问题都写在了循环加载一文中，有兴趣的朋友欢迎交流一下 ...

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

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2.7k views

1 answer

arrays - "Notice: Undefined variable", "Notice: Undefined index", and "Notice: Undefined offset" using PHP

I'm running a PHP script and continue to receive errors like: Notice: Undefined variable: my_variable_name in C ... about repetitive questions? Do reference questions make sense?...

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

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3.3k views

1 answer

python 3.x - Pandas groupby => AttributeError: 'function' object has no attribute 'mean'

I try to compute the average size of a population composed of men and women: >>> import pandas as pd >>> ... size.mean() AttributeError: 'function' object has no attribute 'mean'...

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

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3.2k views

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knockout.js - Checkbox doesn't enable fields Knockout

I'm trying to set enabled true for "SetOutputCurrentPPLowValue" & "SetOutputCurrentPPHighValue" when "SetAlarmValues" is checked ... .regData = ko.observable(new Registration()); }...

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

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2.8k views

1 answer

splitchunks 多页应用打包问题

使用 splitchunks 提取的公共资源即使没有使用到的页面也会引用，比如有 a, b, c 三个入口，其中 a 和 b 都引用了一个 vendor.js，然后用 splitchunks 提取 vender.js 之后，这 ... .0", "webpack-cli": "^4.2.0", "webpack-dev-server": "^3.11.0",...

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

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3.3k views

1 answer

asciidoc, doctoolchain, target github readme.adoc - how to export asciidoc file containing includes into ONE file without include?

GitHub supports asciidoc readme files, but it looks like "include" is not supported. I want to use doctoolchain ... ? The doctoolchain build folder contains only the target files....

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

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3.3k views

1 answer

vue有没有像mixin混入js这样的混入元素

有这样的一个需求，有很多页面有多个重复的表单，我想要把这些表单整合到一个组件里，但是这个组件又需要页面的form表单对象还有校验方法，有没有办法不通过props这样的父子组件传参，而是类似mixin这样的混入js来混入这个组件因为我想要不 ... 表单，表单绑定的数据对象用引入的页面的但是如果当作父子组件来用，又必须传参，不然子组件会提示绑定的值找不到...

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

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3.5k views

1 answer

vue display:none,@click @change失效有啥办法解决吗

外层的dom设置了display：none，里面的的插值{{XXX}}都没问题，但是@click @change 都是失效了，请问这是什么问题，感谢，有其他思路解决吗 <div class="tt" style=" ... /form> <a class="sub-tt" @click="submitAfterForm()">下一步</a> </div>...

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

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4.0k views

1 answer

SpringBoot返回文件流报"远程主机强迫关闭了一个现有的连接"

var out = response.getOutputStream(); while ((len = br.read(buf)) > 0) out.write(buf, 0, len); br.close(); out.close(); 报错的行是out.write( ... 闭了浏览器，导致无法继续write 请问有什么办法可以判断用户已经关闭了请求？...

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

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3.5k views

1 answer

React Hook 修改状态的时候，传的状态值没有变化，但第一次依旧重新渲染了？

` function Counter4() { const [counter, setCounter] = useState(1); console.log('render', counter); return ( <> <p>{counter}</p> < ... 候就不会render了请问这是什么原因呢，是和Object.is浅比较有关吗？...

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

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3.7k views

1 answer

请问怎么使用c语言编程这段代码？

...

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

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4.1k views

1 answer

vuex mounted中取不到mapState的值

`<template> <div class="home"> vuex action <div>点击获取数据</div> <ul> <li v-for="(item, index) of voteData" :key=" ... this.voteData console.log(this.a) }, methods: { } } </script> `...

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

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3.8k views

1 answer

请问下自定义alert弹窗，怎么设置样式不被vlc播放的视频遮挡

现在弹框model样式 .model { position: fixed; width: 100%; height: 100%; top: 0; left: 0; background: rgba(0,0,0,0.2); z-index: 2147483647; }...

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

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4.0k views

1 answer

antd样式在shadow DOM中不显示要怎么解决呢？

如图所示，使用antd写的组件，使用shadow Dom隔离后样式不显示了，请问有人知道什么原因吗？...

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

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3.6k views

1 answer

js如何响应滚动条的点击事件？

<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8" /> <meta name="viewport" content="width=device-width, initial-scale=1.0" /> < ... 面上有很多元素，我只想监听滚动条滚动时的事件，需要每个都进行绑定吗？...

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

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3.8k views

1 answer

python - AttributeError at / 'Product' object has no attribute 'get_category_display'

hi I want in my products api show the name of category instead of showing category id . I wrote a function to do that ... = ('-created',) def __str__(self): return self.name...

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

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3.5k views

1 answer

java 格式化字符串报错

String cursor=object.getJSONObject("extra").getString("cursor"); String internal_ext=object.getString("internal_ext"); String webSocketUrl="wss:// ... :14) 我把url 格式化然后加上{0}也报错...

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

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