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I see a "pipe" character (|) used in a function call: res = c1.create(go, come, swim, "", startTime, endTime, ... bx) What is the meaning of the pipe in ax|bx? Question&Answers:os...

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

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240 views

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sql server - SQL performance on LEFT OUTER JOIN vs NOT EXISTS

If I want to find a set of entries in table A but not in table B, I can use either LEFT OUTER JOIN ... more efficient than NOT EXISTS in general on SQL Server? Question&Answers:os...

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

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588 views

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linux - Python: how to kill child process(es) when parent dies?

The child process is started with subprocess.Popen(arg) Is there a way to ensure it is killed when parent ... using a different method of starting a process. Question&Answers:os...

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

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android - How to start Fragment from an Activity

I already want to start my RecipientFragment from my MainActivity and pass data onto the Fragment from ... .class); recipientsIntent.setData(mMediaUri); Question&Answers:os...

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

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javascript - JS string.split() without removing the delimiters

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

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545 views

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PHP/MySQL Insert null values

I'm struggling with some PHP/MySQL code. I am reading from 1 table, changing some fields then writing to another ... 2 columns which may or may not be null Question&Answers:os...

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

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.net - HttpWebRequest to URL with dot at the end

when i do a GET with WebRequest.Create("http://abc/test.") i get 404 because according to fiddler the ... or work around it. any workaround is appreciated! Question&Answers:os...

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

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android - Upgraded to SDK 2.3 - now no emulators have connectivity

I've upgraded from 2.2 to 2.3. I originally thought that I had just a problem with ... .openConnection(DefaultClientConnectionOperator.java:136) 12-07 12:11:41...

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

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php - Are mysql_real_escape_string() and mysql_escape_string() sufficient for app security?

Will mysql_real_rescape_string() be enough to protect me from hackers and SQL attacks? Asking because I heard that ... : Also, what about LIKE SQL attacks? Question&Answers:os...

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

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java - Why I can't create an array with large size?

Why it is impossible to create an array with max int size? int i = 2147483647; int[] array = new int[i]; I found ... JVM OSX 10.10.4 PS And why -5 actually? Question&Answers:os...

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

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Does C support overloading?

I just want to know if C supports over loading? As we use system functions like printf with different no of arguments. Help me out Question&Answers:os...

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

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341 views

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.net - Single-threaded apartment - cannot instantiate ActiveX control

I need to get information about applied CSS styles in HTML page. I used AxWebBrowser and iterate IHTMLDOMNode. ... solve this or other option than AxWebBrowser? Question&Answers:os...

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

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76 views

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c# - Converting a string to a class name

I have a string variable that represents the name of a custom class. Example: string s = "Customer"; I will ... to be able to create this arraylist on runtime? Question&Answers:os...

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

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CSS background-size: cover + background-attachment: fixed clipping background images

I have a list of figures containing background images. Something like the following: <ul> <li> <figure style=" ... example: http://codepen.io/Godwin/pen/KepiJ Question&Answers:os...

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

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java - Why is it not a good practice to synchronize on Boolean?

My architect always says that Never synchronize on Boolean I am not able to understand the reason why and would really ... else to turn the thing on } } } Question&Answers:os...

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

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c++ - Lock-free Progress Guarantees

Anecdotally, I've found that a lot of programmers mistakenly believe that "lock-free" simply means " ... reservation system basically a mutex in disguise? Question&Answers:os...

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

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234 views

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c++ - Determine if a type is an STL container at compile time

I would like to write a template that will determine if a type is an stl container at compile time. I've got the ... deque<T,Alloc>, set<T,Alloc,Comp> etc... Question&Answers:os...

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

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562 views

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python - find length of sequences of identical values in a numpy array (run length encoding)

In a pylab program (which could probably be a matlab program as well) I have a numpy array of numbers representing ... b)-1: durations.append(counter) print '.' Question&Answers:os...

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

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225 views

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android - Eclipse compiles successfully but still gives semantic errors

NOTE: it apparently is a recurrent question on StackOverflow, but - for what I have seen - either people never ... are. Any comment will be really appreciated. Question&Answers:os...

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

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94 views

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c++ - Floating point keys in std:map

The following code is supposed to find the key 3.0in a std::map which exists. But due to floating point ... operator<(...) to implement this functionality? Question&Answers:os...

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

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210 views

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Java Interfaces Methodology: Should every class implement an interface?

I've been programming in Java for a few courses in the University and I have the following question: Is it ... , so it doesn't waste any time anyway. Question&Answers:os...

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

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236 views

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java - Deserializing into a HashMap of custom objects with jackson

I have the following class: import org.codehaus.jackson.annotate.JsonIgnoreProperties; import org.codehaus.jackson.annotate ... . Any help would be appreciated. Question&Answers:os...

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

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91 views

1 answer

How to call a superclass method using Java reflection

I have two classes: public class A { public Object method() {...} } public class B extends A { @Override ... But the above code will still invoke B.method(). Question&Answers:os...

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

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232 views

1 answer

c# - How can we show progress bar for upload with FtpWebRequest

I am uploading files to ftp using FtpWebRequest. I need to show the status that how much is done. So far my code ... Request Stream strm.Close(); fs.Close(); } Question&Answers:os...

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

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java - Why is my URI not hierarchical?

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

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394 views

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c++ - C++11 - static_assert within constexpr function?

How would one properly do a static_assert within a constexpr function? For example: constexpr int do_something(int x) { ... 7 does not let me compile this code. Question&Answers:os...

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

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64 views

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c# - Convert byte array to image in wpf

I used private BitmapImage byteArrayToImage(byte[] byteArrayIn) { try { MemoryStream stream = new MemoryStream(); ... ? Is there any alternative method.?? 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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email - How to change envelope from address using PHP mail?

I am using PHP with Apache on Linux, with Sendmail. I use the PHP mail function. The email is sent, but ... folks, the fifth parameter works and all is well. Question&Answers:os...

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

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