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Is Java really slow?
...my opinion, this is the main reason Java still has a bad reputation, especially server-side. This makes the String problems exponentially worse. Some simple mistakes are common: objects are often used in place of primitives, reducing performance and increasing memory use. Many Java libraries (includ...
Keep-alive header clarification
... is recognized by source IP and port and destination IP and port. Your OS, all intermediate session-aware devices and the server's OS will recognize the connection by this.
HTTP works with request-response: client connects to server, performs a request and gets a response. Without keep-alive, the c...
How does @synchronized lock/unlock in Objective-C?
...m is more complex and uses recursive locks, but it should get the point across.
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Convert PDF to image with high resolution
...o the result of my original command (the image on the right):
(To really see and appreciate the differences between the two, right-click on each and select "Open Image in New Tab...".)
Also keep the following facts in mind:
The worse, blurry image on the right has a file size of 1.941.702 ...
Xcode duplicate/delete line
Coming from Eclipse and having been used to duplicate lines all the time, it's pretty strange finding out that Xcode has no such function. Or does it?
...
How to declare global variables in Android?
...em you are encountering is how to save state across several Activities and all parts of your application. A static variable (for instance, a singleton) is a common Java way of achieving this. I have found however, that a more elegant way in Android is to associate your state with the Application con...
What is the direction of stack growth in most modern systems?
...
Stack growth doesn't usually depend on the operating system itself, but on the processor it's running on. Solaris, for example, runs on x86 and SPARC. Mac OSX (as you mentioned) runs on PPC and x86. Linux runs on everything from my big honkin' Syste...
Error: Tablespace for table xxx exists. Please DISCARD the tablespace before IMPORT
...
A little late here but generally I've seen this problem occur when you get a 'tablespace full' error when running in a 'innodb_file_per_table' mode. Without going into too much detail (more here), the database server's tablespace is defined by the inno...
dealloc in Swift
..., namely to remove an NSNotificationCenter notification. Implementing dealloc results in a Swift compiler error:
5 Answ...
How to check edittext's text is email address or not?
...iew.findViewById(R.id.login_email);
String getEmailId = emailid.getText().toString();
// Check if email id is valid or not
if (!isEmailValid(getEmailId)){
new CustomToast().Show_Toast(getActivity(), loginView,
"Your Email Id is Invalid.");
}
...