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Why does Apple recommend to use dispatch_once for implementing the singleton pattern under ARC?
...ync() is synchronous). The use of dispatch_once() replaces the following idiom:
+ (MyClass *)sharedInstance {
static MyClass *sharedInstance;
@synchronized(self) {
if (sharedInstance == nil) {
sharedInstance = [[MyClass alloc] init];
}
}
return sharedInst...
What is Mocking?
...
Prologue: If you look up the noun mock in the dictionary you will find that one of the definitions of the word is something made as an imitation.
Mocking is primarily used in unit testing. An object under test may
have dependencies on other (complex) objects. To isolate the...
“Could not find bundler” error
...
if you create a new applocation - rails new and if you get this error?
– AMIC MING
Mar 19 '13 at 0:35
2
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bundle install returns “Could not locate Gemfile”
...o the gemfile in the same command e.g.
BUNDLE_GEMFILE="MyProject/Gemfile.ios" bundle install
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How do I do a HTTP GET in Java? [duplicate]
...you want to stream any webpage, you can use the method below.
import java.io.*;
import java.net.*;
public class c {
public static String getHTML(String urlToRead) throws Exception {
StringBuilder result = new StringBuilder();
URL url = new URL(urlToRead);
HttpURLConnection co...
How to store printStackTrace into a string [duplicate]
...eturn errors.toString();
Ought to be what you need.
Relevant documentation:
StringWriter
PrintWriter
Throwable
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Convert JSON String to JSON Object c#
...json = JObject.Parse(str);
You might want to refer to Json.NET documentation.
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Java内存泄露原因详解 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...机会。
4、各种连接
比如数据库连接（dataSourse.getConnection()），网络连接(socket)和io连接，除非其显式的调用了其close（）方法将其连接关闭，否则是不会自动被GC 回收的。对于Resultset 和Statement 对象可以不进行显式回收，但Conne...
How do SO_REUSEADDR and SO_REUSEPORT differ?
The man pages and programmer documentations for the socket options SO_REUSEADDR and SO_REUSEPORT are different for different operating systems and often highly confusing. Some operating systems don't even have the option SO_REUSEPORT . The WEB is full of contradicting information regarding th...
Is there a way to remove the separator line from a UITableView?
...de. This is done automatically in grouped, but this also changes the dimensions of the table in a way that is hard to measure. I have set the seperator line color to colorClear. But this does not completely solve the problem.
...