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Why does InetAddress.isReachable return false, when I can ping the IP address?
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The "isReachable" method has not been worthy of using for me in many cases. You can scroll to the bottom to see my alternative for simply testing if you're online and capable of resolving external hosts (i.e. google.com) ... Which generally se...
Getting the class name from a static method in Java
How can one get the name of the class from a static method in that class. For example
15 Answers
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JUnit test for System.out.println()
...or an old application that's poorly designed and is writing a lot of error messages to standard output. When the getResponse(String request) method behaves correctly it returns a XML response:
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What does void* mean and how to use it?
Today when I was reading others' code, I saw something like void *func(void* i); , what does this void* mean here for the function name and for the variable type, respectively?
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How can I turn off Visual Studio 2013 Preview?
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From the menu go to Tools -> Options then navigate to Environment -> Tabs and Windows and uncheck the Preview Tab checkboxes.
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Accessing members of items in a JSONArray with Java
...sn't iteration with the loop make the id get assigned to int id multiple times?
– Nav
Jun 28 '16 at 10:04
For more com...
How can I make a Python script standalone executable to run without ANY dependency?
...thon, but it seems it still need Python to run compiled executable. Do you mean compiling script to .pyc using Cython? (I didn't know if Cython has such feature)
– Jeff
Mar 28 '11 at 12:18
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How to choose an AES encryption mode (CBC ECB CTR OCB CFB)?
...CB should not be used if encrypting more than one block of data with the same key.
CBC, OFB and CFB are similar, however OFB/CFB is better because you only need encryption and not decryption, which can save code space.
CTR is used if you want good parallelization (ie. speed), instead of CBC/OFB/CFB....
What is the difference between decodeURIComponent and decodeURI?
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To explain the difference between these two let me explain the difference between encodeURI and encodeURIComponent.
The main difference is that:
The encodeURI function is intended for use on the full URI.
The encodeURIComponent function is intended to be used on .. well...
How to set default values in Rails?
...; ActiveRecord::Migration
def self.up
change_column :people, :last_name, :type, :default => "Doe"
end
def self.down
# You can't currently remove default values in Rails
raise ActiveRecord::IrreversibleMigration, "Can't remove the default"
end
end
Because ActiveRecord autodi...