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I don't understand the need for self-joins. Can someone please explain them to me? A simple example would be very helpful. Question&Answers:os...

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parsing - How to parse a query string into a NameValueCollection in .NET

I would like to parse a string such as p1=6&p2=7&p3=8 into a NameValueCollection. What is the most elegant way ... don't have access to the Page.Request object? Question&Answers:os...

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

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css - IE 8: background-size fix

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

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java - How to wait for a number of threads to complete?

What is a way to simply wait for all threaded process to finish? For example, let's say I have: public class ... until all threads' run() methods exit? Thanks! Question&Answers:os...

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

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convert '1' to '0001' in JavaScript

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

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CSS Units - What is the difference between vh/vw and %?

I just learned about a new and uncommon CSS unit. vh and vw measure the percentage of height and width of the ... , why were these new units introduced to CSS3? Question&Answers:os...

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

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timer - java: run a function after a specific number of seconds

I have a specific function that I want to be executed after 5 seconds. How can i do that in Java? I ... this class provides. Please add a simple usage example. Question&Answers:os...

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javascript - Textarea onchange detection

How do I detect change event on textarea using javascript? I'm trying to detect how many characters left is available ... to only kick in when focus is out. Question&Answers:os...

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arrays - Working with big data in python and numpy, not enough ram, how to save partial results on disc?

I am trying to implement algorithms for 1000-dimensional data with 200k+ datapoints in python. I want to use numpy, scipy, ... , what can I start to read up on? Question&Answers:os...

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java - Spring Boot, Spring Data JPA with multiple DataSources

I'm trying to connect each @Repositories to different DataSource(s) with ... .beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanReg...

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browser - Javascript - How to extract filename from a file input control

When a user selects a file in a web page I want to be able to extract just the filename. I did try ... How can we extract just the file name without extension? Question&Answers:os...

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How do I switch my CSS stylesheet using jQuery?

What I'm working on is simple. You click on a button (id="themes") and it opens up a div (id=" ... in the same directory) Any help would be much appreciated. Question&Answers:os...

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Android: How to open a specific folder via Intent and show its content in a file browser?

I thought this would be easy but as it turns out unfortunately it's not. What I have: I have a folder called " ... (file), "*/*"); startActivity(intent); } Question&Answers:os...

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

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Executing a Java application in a separate process

Can a Java application be loaded in a separate process using its name, as opposed to its location, in ... name of an application class as CLASS_TO_BE_EXECUTED. Question&Answers:os...

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android - Couldn't load memtrack module Logcat Error

I am getting an error Couldn't load memtrack module (No such file or directory) failed to load memtrack module ... . Anybody know how to solve these errors? Question&Answers:os...

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GCC C++ Linker errors: Undefined reference to 'vtable for XXX', Undefined reference to 'ClassName::ClassName()'

I'm setting up a C++ project, on Ubuntu x64, using Eclipse-CDT. I'm basically doing a hello world and linking ... 1 exit status make: *** [LinkProblem] Error 1 Question&Answers:os...

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Escaping Strings in JavaScript

Does JavaScript have a built-in function like PHP's addslashes (or addcslashes) function to add backslashes to ... 'single-quotes' and "double-quotes". Question&Answers:os...

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assembly - `testl` eax against eax?

I am trying to understand some assembly. The assembly as follows, I am interested in the testl line: 000319df 8b4508 ... - wouldn't the value always be true? Question&Answers:os...

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python - Maximum value for long integer

How can I assign the maximum value for a long integer to a variable, similar, for example, to C++'s LONG_MAX. Question&Answers:os...

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How can I iterate through the unicode codepoints of a Java String?

So I know about String#codePointAt(int), but it's indexed by the char offset, not by the codepoint offset. ... someone must have come up with something better. Question&Answers:os...

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c++ - How to convert an OpenCV cv::Mat to QImage

I am wondering how would I convert the OpenCV C++ standard cv::Mat type to QImage. I have been searching around, ... , but that is not what I want. Thanks. Question&Answers:os...

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xcode - What is a StoryBoard ID and how can I use this?

I am new to IOS developing and recently started in Xcode 4.5. I saw for every viewController that i could ... remember my controller right? What does it do? Question&Answers:os...

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

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How do I unescape HTML entities in a string in Python 3.1?

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

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javascript - Placeholder in IE9

It seems it's a very well known problem but all the solutions I found on Google don't work on my newly ... to help the user this property is very convenient. Question&Answers:os...

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

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javascript - Promise Retry Design Patterns

Edit Pattern that keep on retrying until the promise resolves (with delay and maxRetries). Pattern that keeps on retrying ... ('done')}) .catch(console.error); Question&Answers:os...

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python - How to manually install a pypi module without pip/easy_install?

I want to use the gntp module to display toaster-like notifications for a C/C++ software. I want to package all ... I'm using Python 2.7 on a Windows machine. Question&Answers:os...

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

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java - How to bundle a native library and a JNI library inside a JAR?

The library in question is Tokyo Cabinet. I want is to have the native library, JNI library, and all ... Yes, I realize it may have portability implications. Question&Answers:os...

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

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Importing JSON file in TypeScript

I have a JSON file that looks like following: { "primaryBright": "#2DC6FB", "primaryMain": "#05B4F0", "primaryDarker ... does not exist on type 'typeof "*.json" Question&Answers:os...

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

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