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python - Is there a recursive version of the dict.get() built-in?

I have a nested dictionary object and I want to be able to retrieve values of keys with an arbitrary depth. I' ... about 3.x solutions as well. See Question&Answers more detail:os...

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

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java - Android: How to disable list items on list creation

I'm pretty new to Android dev and still working out a lot of things. I've got a main menu showing using ... string-array> </resources> Thank you See Question&Answers more detail:os...

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

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javascript - React functional components vs classical components

I'm trying to understand when to use React functional components vs. classes and reading from the docs ... use functional components instead. See Question&Answers more detail:os...

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

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Cannot call non W3C standard command while in W3C mode (Selenium::WebDriver::Error::UnknownCommandError) with Selenium ChromeDriver in Cucumber Ruby

We have Cucumber Ruby automation framework where we run few tests on Chrome headless browser in a Docker on Jenkins ... check would be great. See Question&Answers more detail:os...

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

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Why is crontab not executing my PHP script?

I have built one php file to check some result, so that I need to setup a cronjob. I set one to run every 30 ... * * * * and did not work. See Question&Answers more detail:os...

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

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sql server - sql group by only rows which are in sequence

Say I have the following table: MyTable --------- | 1 | A | | 2 | A | | 3 | A | | 4 | B ... this topic however it uses oracle's lag() function. See Question&Answers more detail:os...

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

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list - How to clear cache Android

I need to find a way how to clear the data which my application stores in cache.Basically I am using Fedor's ( ... } } return dir.delete(); } See Question&Answers more detail:os...

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

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c# - How to access a specific item in a Listbox with DataTemplate?

I have a ListBox including an ItemTemplate with 2 StackPanels. There is a TextBox in the second StackPanel ... .Windows.Visibility.Collapsed; } See Question&Answers more detail:os...

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

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objective c - Weak NSString variable is not nil after setting the only strong reference to nil

I have a problem with this code : __strong NSString *yourString = @"Your String"; __weak NSString *myString = ... are not. Why is that? See Question&Answers more detail:os...

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

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.net - Can I host a Windows Form inside a control

I have a customer which as a Visual Basic Project in single instance mode with a wired presentation logic. The ... , is this even possible? See Question&Answers more detail:os...

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

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sql - Mysql query to dynamically convert rows to columns on the basis of two columns

I have followed a question here to use a Mysql query to dynamically convert rows to columns. This works fine, but ... in the link above. Thanks See Question&Answers more detail:os...

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

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Failed to find target with hash string 'android-25'

I have Android Studio 2.2. I am trying to open a project, but I get the error "Failed to find target with ... update the SDK from API24 to 25? See Question&Answers more detail:os...

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

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asp.net mvc - There is no ViewData item of type 'IEnumerable<SelectListItem>' that has the key 'xxx'

There are a couple of posts about this on Stack Overflow but none with an answer that seem to fix the problem ... has the key 'submarket_0'. See Question&Answers more detail:os...

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

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How to get list of common elements of 2 array in Swift?

I have two arrays: fruitsArray = ["apple", "mango", "blueberry", "orange"] vegArray = ["tomato", "potato", " ... as I want to compare 2 arrays. See Question&Answers more detail:os...

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

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javascript - How to iterate through all attributes in an HTML element?

I need the JavaScript code to iterate through the filled attributes in an HTML element. This Element.attributes ... like jQuery / Prototype) See Question&Answers more detail:os...

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

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delphi - Antivirus False positive in my executable

I just ran into an annoying problem. Suddenly Avira AntiVir started to flag one executable from my software as ... you have any creative idea. See Question&Answers more detail:os...

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

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Timeout XMLHttpRequest

How can I add a timeout to the following script? I want it to display text as "Timed Out". var bustcachevar = ... try again in a few moments' } See Question&Answers more detail:os...

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

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python - Directory transfers with Paramiko

How do you use Paramiko to transfer complete directories? I'm trying to use: sftp.put("/Folder1","/Folder2") ... : [Errno 21] Is a directory See Question&Answers more detail:os...

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

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python - Pygame, sounds don't play

I'm trying to play sound files (.wav) with pygame but when I start it I never hear anything. This is the ... channels but the result is the same See Question&Answers more detail:os...

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

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c - Function to dynamically allocate matrix

I want to create a function to allocate (with malloc/calloc) a matrix declared as a double pointer. I understood ... = 0; return ext_status; } See Question&Answers more detail:os...

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

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java - How to escape the equals sign in properties files

How can I escape the equals sign (=) in Java property files? I would like to put something as the ... file: table.whereclause=where id=100 See Question&Answers more detail:os...

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

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android - Gradle DSL method not found: 'compile()'

I had this gradle error. Error:(9, 0) Gradle DSL method not found: 'compile()' I have tried refering to similar ... } What's wrong with my code? See Question&Answers more detail:os...

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

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ios - Xcode NSManagedObject subclass contains optionals when they are marked as non-optional

I have a core data entity named Film which has properties title and date. I noticed that the generated NSManagedObject ... it as optional? Why? See Question&Answers more detail:os...

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

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ruby - usage of attr_accessor in Rails

When do you use attr_reader/attr_writer/attr_accessor in Rails models? See Question&Answers more detail:os...

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

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ECONNREFUSED error when connecting to mongodb from node.js

I know I'm doing some very stupid and noobish, but I'm hoping someone can help me set up a basic database ... .1:52175 (0 connections now open) See Question&Answers more detail:os...

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

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python - TypeError: 'range' object does not support item assignment

I was looking at some python 2.x code and attempted to translate it to py 3.x but I'm stuck on ... ' object does not support item assignment See Question&Answers more detail:os...

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

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c++ - Taking the address of a temporary object

§5.3.1 Unary operators, Section 3 The result of the unary & operator is a pointer to its operand. The ... can test this program, please? See Question&Answers more detail:os...

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

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How to catch JNI/Java Exception

I have a JNI layer in my application. In some cases Java throws an exception. How can I get the Java exception ... pass it to my logger module? See Question&Answers more detail:os...

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

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