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java - Hibernate throws MultipleBagFetchException - cannot simultaneously fetch multiple bags

Hibernate throws this exception during SessionFactory creation: org.hibernate.loader.MultipleBagFetchException: cannot ... Bozho for the solution). Question&Answers:os...

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python - Improve subplot size/spacing with many subplots in matplotlib

Very similar to this question but with the difference that my figure can be as large as it needs to be. I need to ... ],y_list) fig.savefig('out.png', dpi=100) Question&Answers:os...

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android - This Handler class should be static or leaks might occur: IncomingHandler

I'm developing an Android 2.3.3 application with a service. I have this inside that service to communicate ... might occur: IncomingHandler What does it mean? Question&Answers:os...

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

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python - What is the reason for performing a double fork when creating a daemon?

I'm trying to create a daemon in python. I've found the following question, which has some good resources ... the second fork? What are the repercussions? Question&Answers:os...

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java - Google Gson - deserialize list<class> object? (generic type)

I want to transfer a list object via Google Gson, but I don't know how to deserialize generic types. What I ... , though. Edit3: Solved, see my answer below. Question&Answers:os...

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python - What are the differences between numpy arrays and matrices? Which one should I use?

What are the advantages and disadvantages of each? From what I've seen, either one can work as a replacement ... matrices, but also lots of vectors (arrays). Question&Answers:os...

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c++ - How to make cin take only numbers

Here is the code double enter_number() { double number; while(1) { cin>>number; if(cin.fail()) { cin.clear(); cin ... it work with any real number e.g. 1.8? Question&Answers:os...

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WPF - Import image as resource

In WinForms it is possible to import an image as a resource, and the image would still work when compiled in the /bin ... -dark.png" /> </Image.Source> </Image> Question&Answers:os...

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How to remove all debug logging calls before building the release version of an Android app?

According to Google, I must "deactivate any calls to Log methods in the source code" before publishing my ... to efficiently but safely remove all Log lines? Question&Answers:os...

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sql - Difference between JOIN and INNER JOIN

Both these joins will give me the same results: SELECT * FROM table JOIN otherTable ON table.ID = ... ? Does it differ between different SQL implementations? Question&Answers:os...

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git - Support for password authentication was removed. Please use a personal access token instead

I got this error on my console when I tried to use git pull: remote: Support for password authentication was ... , 2021. Why has this been removed today? Question&Answers:os...

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javascript - How to save an image to localStorage and display it on the next page?

So, basically, I need to upload a single image, save it to localStorage, then display it on the next page. ... is pressed, and then process and save the image. Question&Answers:os...

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How do I redirect with JavaScript?

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Delete with Join in MySQL

Here is the script to create my tables: CREATE TABLE clients ( client_i INT(11), PRIMARY KEY (client_id) ); ... working right now because no posts are deleted. Question&Answers:os...

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java - How do you cast a List of supertypes to a List of subtypes?

For example, lets say you have two classes: public class TestA {} public class TestB extends TestA{} I have a method ... so that I end up with a List<TestB>. Question&Answers:os...

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php - Convert seconds to Hour:Minute:Second

I need to convert seconds to "Hour:Minute:Second". For example: "685" converted to "00:11:25" How can I achieve this? Question&Answers:os...

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hyperlink - How to open link in a new tab in HTML?

I'm working on an HTML project, and I can't find out how to open a link in a new tab without JavaScript. I ... Any ideas how to make it open in a new one? Question&Answers:os...

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javascript - Does IE9 support console.log, and is it a real function?

In which circumstances is window.console.log defined in Internet Explorer 9? Even when window.console.log is defined, ... What happened to console.log in IE8?.] Question&Answers:os...

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

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javascript - CSS3 transition events

Are there any events fired by an element to check whether a css3 transition has started or end? Question&Answers:os...

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Quickest way to convert XML to JSON in Java

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ios9 - iOS 9 not opening Instagram app with URL SCHEME

The following URL opens on iOS 8.3 and lower, but it does not work and iOS 9 let instagramURL = NSURL(string: "instagram://app") Why won't the URL open? Question&Answers:os...

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c - How can I read an input string of unknown length?

If I don't know how long the word is, I cannot write char m[6];, The length of the word is maybe ten ... a string with lenght=5 hello this is the string: hello Question&Answers:os...

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api - How do I download a file using VBA (without Internet Explorer)

I need to download a CSV file from a website using VBA in Excel. The server also needed to authenticate ... to share the solution below for future reference. Question&Answers:os...

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jquery - TypeError: 'undefined' is not a function (evaluating '$(document)')

I'm using a WordPress site. I'm including this script in the header. When the script loads, I get this error: ... firebug, I get this: $ is not a function Question&Answers:os...

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ipc - What is the simplest method of inter-process communication between 2 C# processes?

I want to create a communication between a parent and a child process, both written in C#. It should be ... communication. What is the best solution for it? Question&Answers:os...

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

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sql - MySQL: Can't create table (errno: 150)

I am trying to import a .sql file and its failing on creating tables. Here's the query that fails: CREATE TABLE ... table './dbname/data.frm' (errno: 150) Question&Answers:os...

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

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sorting - sort files by date in PHP

I currently have an index.php file which allows me to output the list of files inside the same directory, the output shows ... /tr>"; } } } closedir($handle); } Question&Answers:os...

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postgresql - Two SQL LEFT JOINS produce incorrect result

I have 3 tables: users(id, account_balance) grocery(user_id, date, amount_paid) fishmarket(user_id, date, amount_paid) ... here? I am using PostgreSQL 9.1. Question&Answers:os...

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

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