OStack Q&A-Knowledge Sharing Community

0 votes

1.5k views

1 answer

performance - What's the actual effect of successful unaligned accesses on x86?

I always hear that unaligned accesses are bad because they will either cause runtime errors and crash the program or ... two versions of code? See Question&Answers more detail:os...

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

0 votes

210 views

1 answer

c# - Panel for drawing graphics and scrolling

I want to be able to use a Panel or similar to draw graphics onto a Winform. I cannot seem to see ... similar control that will allow it? See Question&Answers more detail:os...

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

0 votes

170 views

1 answer

Should I use prepared statements for MySQL in PHP PERFORMANCE-WISE?

I understand the security benefits of prepared statements in MySQL. No need to cover that topic here. I'm wondering ... really is "it depends." See Question&Answers more detail:os...

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

0 votes

373 views

1 answer

c++ - Linking problems due to symbols with abi::cxx11?

We recently caught a report because of GCC 5.1, libstdc++ and Dual ABI. It seems Clang is not aware ... link an applications with the library. See Question&Answers more detail:os...

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

0 votes

268 views

1 answer

java - Why does TreeSet throw a ClassCastException?

I am trying to add two 'Employee' objects to a TreeSet: Set<Employee> s = new TreeSet<Employee>(); s.add(new ... happen and how do I fix it? See Question&Answers more detail:os...

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

0 votes

323 views

1 answer

PHP Regex find text between custom added HTML Tags

I have he following scenario: Got an HTML template file that will be used for mailing. Here is a reduced ... /replacing this List? Thanks! See Question&Answers more detail:os...

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

0 votes

286 views

1 answer

c - Check to see if a pthread mutex is locked or unlocked (After a thread has locked itself)

I need to see if a mutex is locked or unlocked in an if statement so I check it like this... if ... &cond_a); pthread_mutex_unlock(&lock_a); } } See Question&Answers more detail:os...

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

0 votes

1.9k views

1 answer

wpf - How to free the memory after the BitmapImage is no longer needed?

First, I load a BitmapImage into the Image control, whice is located on the Window. Then I work with the ... control manually to free the RAM? See Question&Answers more detail:os...

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

0 votes

280 views

1 answer

c++ - Why are lambda expressions not allowed in an unevaluated operands but allowed in the unevaluated portions of constant expressions?

If we look at the draft C++ standard section 5.1.2 Lambda expressions paragraph 2 says (emphasis mine going ... , perhaps to allow for SFINAE? See Question&Answers more detail:os...

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

0 votes

361 views

1 answer

c - How to use "zd" specifier with `printf()`?

Looking for clarification on using "zd" with printf(). Certainly the following is correct with C99 and later. void ... that can use "%zd"? See Question&Answers more detail:os...

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

0 votes

119 views

1 answer

c++ - How do I call the original "operator new" if I have overloaded it?

Suppose I need to overload global ::operator new() for storing extra data with each allocated object. So basically ... global ::operator new()? See Question&Answers more detail:os...

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

0 votes

157 views

1 answer

android - How to prevent Multiple Toast Overlaps

I've been using a common "myToast" which I use "myToast.cancel() prior to issuing a new toast. For Android v2.3 ... with Android 2.2, 2.3. See Question&Answers more detail:os...

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

0 votes

299 views

1 answer

c# - How do I find duplicates in an array and display how many times they occurred?

I'm working on a code that prints out duplicated integers from an array with the number of their occurrence. I'm ... Console.ReadKey(); } } } See Question&Answers more detail:os...

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

0 votes

709 views

1 answer

ios7 - UILabel and NSLinkAttributeName: Link is not clickable

I want to use attributed strings with NSLinkAttributeName to create clickable links inside a UILabel instance within my ... do this? Thanks! See Question&Answers more detail:os...

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

0 votes

181 views

1 answer

When and how are classes garbage collected in Java?

I asked a question about Garbage Collection in Java in this topic. But the answer I got, gave me another question ... true, how does this work? See Question&Answers more detail:os...

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

0 votes

1.2k views

1 answer

security - How to force java server to accept only tls 1.2 and reject tls 1.0 and tls 1.1 connections

I have a HTTPS web service running on Java 7. I need to make changes so that this service only accepts ... java accept only TLS1.2 connections. See Question&Answers more detail:os...

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

0 votes

160 views

1 answer

ios - Dismiss keyboard on touch anywhere outside UITextField

I am developing an iPad app that has a large number of UIViewControllers, UITableViews (with cells with ... entire app? Many thanks See Question&Answers more detail:os...

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

0 votes

264 views

1 answer

javascript - How to use timezone offset in Nodejs?

I need the next flow: var a = new Date(1337324400000, 'Europe/Amsterdam'); //+2h console.log(a); // ... such possibility in nodejs utils api ? See Question&Answers more detail:os...

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

0 votes

122 views

1 answer

PHP mutual exclusion (mutex)

Read some texts about locking in PHP. They all, mainly, direct to http://php.net/manual/en/function.flock.php ... load the new one. Correct? See Question&Answers more detail:os...

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

0 votes

169 views

1 answer

Why do some Unicode characters display in matrices, but not data frames in R?

For at least some cases, Asian characters are printable if they are contained in a matrix, or a vector, but not ... attached): [1] tools_3.0.1 See Question&Answers more detail:os...

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

0 votes

150 views

1 answer

Does a c++ struct have a default constructor?

I wrote the following code snippet: void foo() { struct _bar_ { int a; } bar; cout << "Value of a is ... a of bar is initialized to zero. See Question&Answers more detail:os...

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

0 votes

84 views

1 answer

How do I write to standard error in PowerShell?

I'm having trouble figuring out how to both echo to the standard error stream and redirect the error stream of an ... do/error 2>/tmp/err.msg See Question&Answers more detail:os...

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

0 votes

644 views

1 answer

android - How to set text to view from drawer header layout in navigation drawer without inflating view

I want to set text to the navigation drawers headers text, I searched a lot but everyone does it by ... ); email.setText(personEmail);` See Question&Answers more detail:os...

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

0 votes

61 views

1 answer

ios - Check if a UIAlertView is showing

I have a method that posts HTTP data and displays a UIAlertView if there is an error. If I have multiple HTTP ... . How can I determine this? See Question&Answers more detail:os...

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

0 votes

349 views

1 answer

Python 3: How to specify stdin encoding

While porting code from Python 2 to Python 3, I run into this problem when reading UTF-8 text from standard input. ... is set to en_US.UTF-8. See Question&Answers more detail:os...

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

0 votes

118 views

1 answer

ios - no umbrella header found for target, module map will not be generated

When I trying build CKCountdownButton as a framework in Xcode 6.3, it complains with warning: no umbrella ... No such module 'CKCountdownButton' See Question&Answers more detail:os...

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

0 votes

230 views

1 answer

android - How to hide ToolBar when I scrolling content up?

I am trying to hide my tool bar when I scroll my text and image with content. Here I use scrollView ... layout="@layout/content_main" /> See Question&Answers more detail:os...

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

0 votes

285 views

1 answer

compareto - Comparison method violates its general contract! Java 7 only

I know this has been an issue for a while now, and checked all previously answers I could get, but still this one ... I don't know how... Thanks See Question&Answers more detail:os...

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

Categories

Recent questions

Just Browsing Browsing

Most popular tags