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What is the use of a private static variable in Java?
...ere as ClassName.varName . I am also aware that static members are shared by all instances of a class and are not reallocated in each instance.
...
@synthesize vs @dynamic, what are the differences?
... tells the compiler that the getter and setter methods are implemented not by the class itself but somewhere else (like the superclass or will be provided at runtime).
Uses for @dynamic are e.g. with subclasses of NSManagedObject (CoreData) or when you want to create an outlet for a property define...
curl -GET and -X GET
...
By default you use curl without explicitly saying which request method to use. If you just pass in a HTTP URL like curl http://example.com it will use GET. If you use -d or -F curl will use POST, -I will cause a HEAD and -T w...
How to generate a random alpha-numeric string?
... cause encoding problems if identifiers are included in URLs or re-entered by hand.
The underlying source of randomness, or entropy, for session identifiers should come from a random number generator designed for cryptography. However, initializing these generators can sometimes be computationally ...
How to start nginx via different port(other than 80)
...led/ and if this is the default configuration, then there should be a file by name: default.
Edit that file by defining your desired port; in the snippet below, we are serving the Nginx instance on port 81.
server {
listen 81;
}
To start the server, run the command line below;
sudo service ...
How to prevent line break at hyphens on all browsers
... the text to “words” (sequences of non-whitespace characters separated by whitespace) and wrapping each “word” that contains a hyphen inside nobr markup. So input data like bla bla foo-bar bla bla would be turned to bla bla <nobr>foo-bar</nobr> bla bla.
You might even consider i...
How to send an email with Gmail as provider using Python?
...e From:, To: and Subject: message headers, separated from the message body by a blank line and use CRLF as EOL markers.
E.g.
msg = "\r\n".join([
"From: user_me@gmail.com",
"To: user_you@gmail.com",
"Subject: Just a message",
"",
"Why, oh why"
])
...
Centering a div block without the width
...ner. Lastly, you relatively position the inner div the opposite direction by half of its own width (actually the outer div's width, but they are the same). Ultimately that centers the content in whatever container it's in.
You may need that empty div at the end if you depend on your "product" con...
Available text color classes in Bootstrap
I'm developing a sign up page, by putting some text as the title at the navigation bar. I want to give those texts different colors. For this purpose I'm using a separate CSS file, but I want to do this using bootstrap's CSS file.
...
Given final block not properly padded
...ypt PKCS5-padded data with the wrong key, and then unpad it (which is done by the Cipher class automatically), you most likely will get the BadPaddingException (with probably of slightly less than 255/256, around 99.61%), because the padding has a special structure which is validated during unpad an...