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How do you sign a Certificate Signing Request with your Certification Authority?
...t the password or passphrase.
$ openssl req -x509 -config openssl-ca.cnf -newkey rsa:4096 -sha256 -nodes -out cacert.pem -outform PEM
After the command executes, cacert.pem will be your certificate for CA operations, and cakey.pem will be the private key. Recall the private key does not have a pa...
How to display Toast in Android?
...w = myInflater.inflate(R.layout.your_custom_layout, null);
Toast mytoast = new Toast(this);
mytoast.setView(view);
mytoast.setDuration(Toast.LENGTH_LONG);
mytoast.show();
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Android “Only the original thread that created a view hierarchy can touch its views.”
... the main thread. There is a simple piece of code for this:
runOnUiThread(new Runnable() {
@Override
public void run() {
// Stuff that updates the UI
}
});
Documentation for Activity.runOnUiThread.
Just nest this inside the method that is running in the background, and the...
How do you rotate a two dimensional array?
...
Here it is in C#
int[,] array = new int[4,4] {
{ 1,2,3,4 },
{ 5,6,7,8 },
{ 9,0,1,2 },
{ 3,4,5,6 }
};
int[,] rotated = RotateMatrix(array, 4);
static int[,] RotateMatrix(int[,] matrix, int n) {
int[,] ret = new int[n, n];
for (int ...
Declare a const array
...s Cody suggested, or IList.
public readonly IList<string> ITitles = new List<string> {"German", "Spanish", "Corrects", "Wrongs" }.AsReadOnly();
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What happens if a finally block throws an exception?
...
try
{
try
{
throw new Exception("exception thrown from try block");
}
catch (Exception ex)
{
Console.WriteLine("Inner catch block handling {0}.", ex.Message);
throw;
...
Why does += behave unexpectedly on lists?
...t mutates the object that it acts on. The __add__ special method returns a new object and is also used for the standard + operator.
So when the += operator is used on an object which has an __iadd__ defined the object is modified in place. Otherwise it will instead try to use the plain __add__ and ...
How can I convert this foreach code to Parallel.ForEach?
... File.ReadAllLines(txtProxyListPath.Text);
List<string> list_lines = new List<string>(lines);
Parallel.ForEach(list_lines, line =>
{
//Your stuff
});
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...
Tool to convert Python code to be PEP8 compliant
... make those changes
pep8radius master --diff --in-place
Or to clean the new lines you've commited since the last commit:
pep8radius --diff
pep8radius --diff --in-place
# the lines which changed since a specific commit `git diff 98f51f`
pep8radius 98f51f --diff
Basically pep8radius is applying...
Can I invoke an instance method on a Ruby module without including it?
... puts "Mods.foo"
end
end
class Includer
include Mods
end
Includer.new.foo
Mods.module_eval do
module_function(:foo)
public :foo
end
Includer.new.foo # this would break without public :foo above
class Thing
def bar
Mods.foo
end
end
Thing.new.bar
However, I'm curious why a...