Recent questions in Technique[技术]

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python - 在Ubuntu 18.04上使用Python3.6安装底图(Installing Basemap with Python3.6 on Ubuntu 18.04)

I have been trying to get Basemap up and running for the past couple of hours. (在过去的几个小时中，我一直在尝试启动和运行Basemap )Following this ... 我完全被困在这里，非常感谢您的帮助 ) ask by Rrz0 translate from so...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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linux - 在Bash脚本中管道往返剪贴板(Pipe to/from the clipboard in Bash script)

Is it possible to pipe to/from the clipboard in Bash? (是否可以在Bash中管道进出剪贴板？) Whether it is piping to/from ... contents of "foo" into the clipboard ask by marcog translate from so...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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operating-system - 二进制信号量和互斥量之间的区别(Difference between binary semaphore and mutex)

二进制信号量和互斥量之间是否有任何区别，或者它们基本相同？ ask by Nitin translate from so...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - 在Python中“ SyntaxError：调用'print'时缺少括号”是什么意思？(What does “SyntaxError: Missing parentheses in call to 'print'” mean in Python?)

When I try to use a print statement in Python, it gives me this error: (当我尝试在Python中使用print语句时，它给了我这个错误：) >>> ... What does that mean? (这意味着什么？) ask by ncoghlan translate from so...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c# - 为什么不从列表继承 <T> ？(Why not inherit from List<T>?)

When planning out my programs, I often start with a chain of thought like so: (在计划程序时，我通常会像这样思考：) A football team is ... 是否从List<T>继承时必须考虑什么？) ask by Superbest translate from so...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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php - 花很多时间从oracle获取数据并显示在php中(taking much time to fetch data from oracle and show up at php)

I am working with php and oracle to get data from oracle database and show up at php table with php code by connecting with ... 取得结果吗？)Thanks (谢谢) ask by mdkamrul translate from so...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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javascript - 声明JavaScript数组时，“ Array（）”和“ []”之间有什么区别？(What’s the difference between “Array()” and “[]” while declaring a JavaScript array?)

What's the real difference between declaring an array like this: (声明这样的数组之间的真正区别是什么：) var myArray = new Array(); and (和) var myArray = []; ask by Amr Elgarhy translate from so...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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javascript - $（document）.ready等同于没有jQuery($(document).ready equivalent without jQuery)

I have a script that uses $(document).ready , but it doesn't use anything else from jQuery. (我有一个使用$(document).ready的 ... 框架等之后， window.onload会触发 ) ask by FlySwat translate from so...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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reactjs - 如何以编程方式在Material Ui中展开或折叠Tree Item？(How to programmatically expand or collapse Tree Item in Material Ui?)

Is there any way to programmatically expand and collapse tree items in material ui? (有什么方法可以以编程方式扩展和折叠材料ui中的树项目？ ... )is it possible? (可能吗？) ask by Akira Kotsugai translate from so...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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sql - 在SQL Server中将行有效地转换为列(Efficiently convert rows to columns in sql server)

I'm looking for an efficient way to convert rows to columns in SQL server, I heard that PIVOT is not very fast, and I need ... the result? (如何建立结果？) ask by tbag translate from so...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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javascript - 查找结果为其他3个数组元素之和的数组元素，d = a + b + c(Find array element which results as a sum of other 3 array elements, d = a + b + c)

Task You are given a sorted integer array arr. (任务您将获得一个排序的整数数组arr )It contains several unique integers(negative, ... (如何处理数组中的负值？) ask by metamorph_online translate from so...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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go - 奇怪的golang不匹配类型符文和字符串错误消息(strange golang mismatched types rune and string error message)

I am new to GO programming and I am having a problem with my program which uses a "switch" statement to process the ... 34 35 } // main ask by Barry Kimelman translate from so...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - 如何修复“ android.os.NetworkOnMainThreadException”？(How do I fix 'android.os.NetworkOnMainThreadException'?)

I got an error while running my Android project for RssReader. (运行RssReader的Android项目时出现错误 ) Code: (码：) URL url = new ... issue? (如何解决此问题？) ask by bejoy george translate from so...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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bash - 如何在shell脚本中执行逻辑OR操作(How to do a logical OR operation in shell scripting)

I am trying to do a simple condition check, but it doesn't seem to work. (我正在尝试进行简单的条件检查，但它似乎不起作用 ) If $# ... "$#" > 1 ] ; then echo "hello" fi ask by Strawberry translate from so...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - 避免！=空语句(Avoiding != null statements)

I use object != null a lot to avoid NullPointerException . (我经常使用object != null来避免NullPointerException ) Is there a ... 12943以获取最新的方法 ) ask by community wiki translate from so...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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javascript - 通过javascript将窗口设置为全屏（REAL全屏； F11功能）(Set window to fullscreen (REAL fullscreen; F11 functionality) by javascript)

There are several questions about this, some say it's not possible, some say it IS possible in IE such as Internet Explorer ... 我也不需要）) ask by Can Poyrazo?lu translate from so...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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330 views

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node.js - 如何使用NVM正确升级节点(How to properly upgrade node using nvm)

Is it possible to upgrade node right in place, instead of manually installing the latest stable version? (是否可以就地升级 ... blablablabla ...） ) ask by Boris Burkov translate from so...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - type（）和isinstance（）之间有什么区别？(What are the differences between type() and isinstance()?)

What are the differences between these two code fragments? (这两个代码片段之间有什么区别？)Using type() : (使用type() ... isinstance(b, unicode): do_something_else() ask by abbot translate from so...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - 如何按索引从std :: vector <>擦除元素？(How do I erase an element from std::vector<> by index?)

I have a std::vector<int>, and I want to delete the n'th element. (我有一个std :: vector <int>，我想删除第n个元素 )How ... ; vec.push_back(12); vec.erase(???); ask by dau_man translate from so...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - 你如何在C ++中声明一个接口？(How do you declare an interface in C++?)

How do I setup a class that represents an interface? (如何设置代表接口的类？)Is this just an abstract base class? (这只是一个抽象的基类吗？) ask by Aaron Fischer translate from so...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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287 views

1 answer

java - 如何使用Java插入mysql数据库(how to insert into mysql database with java)

i want to insert inputs i take from user into mysql database the connection is right but the insertion gives me error (我想 ... .println(e); } } ask by Omar Mohamed translate from so...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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shell - 删除文本文件中包含特定字符串的行(Delete lines in a text file that contain a specific string)

我将如何使用sed删除文本文件中包含特定字符串的所有行？ ask by A Clockwork Orange translate from so...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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346 views

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javascript - 如何更改KeyboardDatePicker材质ui的语言？(How to change the language for KeyboardDatePicker material ui?)

I am currently using material ui on the web and I use the KeyboardDatePicker API and it works perfectly, but the names of ... 更改语言吗？) ask by Ruben Valdivia Perez translate from so...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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252 views

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javascript - 如何测试Quasar（作为Vue CLI插件）？(How to test Quasar (as Vue CLI plugin)?)

The bounty expires in 2 days) . 赏金将在2天后过期) ) Answers to this question are eligible for a +50 reputation bounty. 这个问题的答案 ... 但是我想使用 Vue CLI插件版本 ) ask by zvadym translate from so...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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260 views

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javascript - 有没有办法使用JavaScript使用完整字符串的一部分来获取它？(Is there a way to get the Complete String using a portion of it using JavaScript?)

In a GridView, the name of the table is getting generated dynamically. (在GridView中，表的名称是动态生成的 )but it will have the dynamic ... .color = "black"; } } } ask by Tim translate from so...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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357 views

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java - 如何“反编译” Java类文件？ [关闭](How do I “decompile” Java class files? [closed])

What program can I use to decompile a class file? (我可以使用什么程序来反编译类文件？)Will I actually get Java code, or is it just JVM assembly ... 看编译器如何优化某些东西的人们的回答 ) ask by Kip translate from so...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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261 views

1 answer

mysql - 如何将CSV文件导入MySQL表(How to import CSV file to MySQL table)

I have an unnormalized events-diary CSV from a client that I'm trying to load into a MySQL table so that I can refactor ... 确的位置 ) ask by Iain Samuel McLean Elder translate from so...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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368 views

1 answer

r - 更改数据框的列名称(Changing column names of a data frame)

I have a data frame called "newprice" (see below) and I want to change the column names in my program in R. (我有一个名为 newprice 的数 ... ? (有人可以帮我解决这个问题吗？) ask by Son translate from so...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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