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页面布局为上下布局上部是工具栏A（如复制、粘贴等按钮）下部是展示界面B -> C -> D -> E (-> 为嵌套关系) 如果在A上点击按钮时(复制)调用底层E中的方法(paste)？现在的做法是在E的componentDidMount方法中，将E的this存到redux中，在点击A时调用相应的this.paste. 有其他更好的方法吗？...

asked Jan 29, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Series describe function pandas ploting

I have question for you. Which plot is a best to show describe result in series pandas filter = genderage['Customer_Gender' ... 28.000000 50% 35.000000 75% 43.000000 max 87.000000...

asked Jan 29, 2021 in Technique[技术] by 深蓝 (71.8m points)

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javascript - $w.at Event Handler runs recursive when fired on repeater. WIX / Corvid / Velo

I have a pretty simple example of export function (event handler mouseIn) which works somehow odd for me. I have a ... . Thank you in advance. I appreciate any help on this....

asked Jan 29, 2021 in Technique[技术] by 深蓝 (71.8m points)

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用C++API订阅流数据时出现异常

我用DolphinDB Database的C++ api订阅流数据，代码如下： #include <iostream> #include <string> #include <ctime> #include <fstream> #include <sstream> #include " ... 时发生访问冲突如下面2图所示：请问可能是什么原因？...

asked Jan 29, 2021 in Technique[技术] by 深蓝 (71.8m points)

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为什么整数除以 0 会发生异常而使得程序终止，而浮点数除以 0 则不会发生异常导致程序终止（结果为无穷大）？

为什么整数除以 0 会发生异常而使得程序终止，而浮点数除以 0 则不会发生异常导致程序终止（结果为无穷大）？请问这是为什么？...

asked Jan 29, 2021 in Technique[技术] by 深蓝 (71.8m points)

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r - Add a dynamic title to plot based on value in another df

I have two dataframes, one that I used in the function below as the input and another one called abbreviations that ... input would be plot_by_city((Dataframe,"AMS", "tan")...

asked Jan 29, 2021 in Technique[技术] by 深蓝 (71.8m points)

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关于go库singleflight的使用问题

问题：并发获取数据的时候超过一个请求访问到数据库了环境：8核cpu，centos7，go1.14 代码： package main import ( "errors" "log" "sync" "golang.org/x/sync/ ... ", key) return "data", nil } 执行结果1：执行结果2：执行结果3：...

asked Jan 29, 2021 in Technique[技术] by 深蓝 (71.8m points)

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element select下拉框内容选择后回显出来文本过长悬浮，应该如何解决？

已选后的数据就会悬浮在选择器之上，怎么解决？...

asked Jan 29, 2021 in Technique[技术] by 深蓝 (71.8m points)

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excel - ActiveCell.Formula Error 1004 - Very Simple

I am getting a 1004 Error when I run the below code. Sometimes it works but many times it breaks on the ... .Formula = Orig_Formula ActiveCell.offset(1, 0).Activate Many Thanks...

asked Jan 29, 2021 in Technique[技术] by 深蓝 (71.8m points)

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css 的flex容器，有一行标题时，怎样让下个容器全局居中

让middle站在container正中心（红框位置）它只能在自己容器中居中 <div class="container"> <div id='title'>title</div> <div id='middle'>middle</ ... ; flex: 1 1 auto; align-self: center } </style> 目标是红框位置...

asked Jan 29, 2021 in Technique[技术] by 深蓝 (71.8m points)

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swift - Is it possible to serialize a SwiftUI view (i.e. not the ViewModel/state info, but the actual view itself)?

Does Apple provide any way to serialize/deserialize a SwiftUI view for persistence reasons? To be clear, I mean the views ... out there, or is this just not possible by design?...