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I get an exception when I run this code. Why? Exception in thread "main" java.net.ConnectException: ... at https.ssl.MainClass.main(MainClass.java:13) Question&Answers:os...

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

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c# - How do you pass an object from form1 to form2 and back to form1?

I have done some research on this question before deciding to ask it. I just could not find anything that helped ... and cleanest, way in code to achieve this? Question&Answers:os...

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

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android - ListView subobject clickable confilct

After asking a question and spending 15 days to solve this, i am looking for help and solution ... reportedDateView; ImageView imageView; FeedItem newsItem; } Question&Answers:os...

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

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Unable to find a matching set of capabilities with selenium 3.4.3, firefox 54.0 and gecko driver 0.17

if __name__ == '__main__': driver=webdriver.Firefox(executable_path=r'/home/saurabh/Saurabh/LearnPython/Automation/ ... to find a matching set of capabilities Question&Answers:os...

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

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c# - Must declare scalar variable @Id?

So I'm trying to get my "Customers" from my database, but i get an exception An exception of type ' ... [OperationContract] List<Customer> GetCustomers(); } } Question&Answers:os...

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

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python - Error on "pip install -U channels" command using for otree (Running setup.py bdist_wheel for twisted ... error)

For a project using otree (http://otree.readthedocs.io/) I ran into some problems trying to install Channels in order to ... 1 wheel-0.29.0 zope.interface-4.2.0 Question&Answers:os...

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

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Where can I find Android source code online?

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

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java - How can I get the latest JRE / JDK as a zip file rather than EXE or MSI installer?

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

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2d - Drawing Isometric game worlds

What is the correct way to draw isometric tiles in a 2D game? I've read references (such as this ... Are there advantages or disadvantages to either method? Question&Answers:os...

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

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javascript - What is the difference between typeof and instanceof and when should one be used vs. the other?

In my particular case: callback instanceof Function or typeof callback == "function" does it even matter ... Resource: JavaScript-Garden typeof vs instanceof Question&Answers:os...

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

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indexing - Python Pandas: Get index of rows which column matches certain value

Given a DataFrame with a column "BoolCol", we want to find the indexes of the DataFrame in which the values for ... would be the correct Pandas way to do this? Question&Answers:os...

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

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jquery - JavaScript data grid for millions of rows

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

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c# - How to set up Automapper in ASP.NET Core

I'm relatively new at .NET, and I decided to tackle .NET Core instead of learning the "old ways". I found ... is there a more simple walkthrough for a newbie? Question&Answers:os...

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

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c# - List<T> OrderBy Alphabetical Order

I'm using C# on Framework 3.5. I'm looking to quickly sort a Generic List<T>. For the sake of this example, let ... (); people.OrderBy(???? => ?????) Question&Answers:os...

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

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What are my options for storing data when using React Native? (iOS and Android)

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

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c - How to increment a pointer address and pointer's value?

Let us assume, int *p; int a = 100; p = &a; What will the following code actually do and how? p++; ++ ... value of p & a after the execution of each statement? Question&Answers:os...

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

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ios - Send POST request using NSURLSession

Update: Solution found. You can read it at the end of the post. I'm trying to perform a POST request to a ... // Process the response }]; [uploadTask resume]; Question&Answers:os...

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

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linux - How to join multiple lines of file names into one with custom delimiter?

I would like to join the result of ls -1 into one line and delimit it with whatever i want. Are there any standard Linux commands I can use to achieve this? Question&Answers:os...

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

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c++ - When to use std::size_t?

I'm just wondering should I use std::size_t for loops and stuff instead of int? For instance: #include < ... best practice regarding when to use std::size_t? Question&Answers:os...

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

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Reserved keywords in JavaScript

What JavaScript keywords (function names, variables, etc) are reserved? Question&Answers:os...

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

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207 views

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iphone - Inner shadow effect on UIView layer?

I have the following CALayer: CAGradientLayer *gradient = [CAGradientLayer layer]; gradient.frame = CGRectMake(8, 57 ... effect (like this: Help appreciated... Question&Answers:os...

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

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864 views

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static analysis - How to Generate a calling graph for C++ code

I'm trying to generate calling graph with which to find out all the possible execution paths that are hitting a ... D. Does anyone know how to achieve this? Question&Answers:os...

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

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syntax - What is :: (double colon) in Python when subscripting sequences?

I know that I can use something like string[3:4] to get a substring in Python, but what does the 3 mean in somesequence[::3]? Question&Answers:os...

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

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1 answer

javascript - jQuery: Get selected element tag name

Is there an easy way to get a tag name? For example, if I am given $('a') into a function, I want to get 'a'. Question&Answers:os...

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

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linux - Appending a line to a file only if it does not already exist

I need to add the following line to the end of a config file: include "/configs/projectname.conf" to a file ... insert it if the line doesn't already exist? Question&Answers:os...

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

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1.8k views

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django - How to define two fields "unique" as couple

Is there a way to define a couple of fields as unique in Django? I have a table of volumes (of ... fields journal_id and volume_number but it doesn't work. Question&Answers:os...

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

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296 views

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python - Why doesn't os.path.join() work in this case?

The below code will not join, when debugged the command does not store the whole path but just the last entry. ... stores the /new_sandbox/ part of the code. Question&Answers:os...

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

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387 views

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python - Progress indicator during pandas operations

I regularly perform pandas operations on data frames in excess of 15 million or so rows and I'd love to have ... that needs to be added to the library? Question&Answers:os...

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

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