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Why does Java's hashCode() in String use 31 as a multiplier?
...sort of optimization automatically.
(from Chapter 3, Item 9: Always override hashcode when you override equals, page 48)
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How can I pass a Bitmap object from one activity to another
... Parcelable, so you could always pass it with the intent:
Intent intent = new Intent(this, NewActivity.class);
intent.putExtra("BitmapImage", bitmap);
and retrieve it on the other end:
Intent intent = getIntent();
Bitmap bitmap = (Bitmap) intent.getParcelableExtra("BitmapImage");
...
How do you overcome the HTML form nesting limitation?
...rent actions on the resource: "Save" -> POST /my_resource (creating a new resource) "Save" -> PUT /my_resource (modifying an existing resource) "Delete" -> DELETE /my_resource (destroy the resource) RESTfully speaking, the problem is that a POST is expected to create a new resource....
From inside of a Docker container, how do I connect to the localhost of the machine?
... the IP address 172.17.42.1 on the docker0 network interface.
Now start a new container and get a shell on it: docker run --rm -it ubuntu:trusty bash and within the container type ip addr show eth0 to discover how its main network interface is set up:
root@e77f6a1b3740:/# ip addr show eth0
863: et...
Replacing instances of a character in a string
... This will work (+1), but is quite inefficient, as you are creating a new string every time you encounter a ';'
– inspectorG4dget
Oct 4 '12 at 9:08
...
Generic type conversion FROM string
... TC : TypeConverter
{
TypeDescriptor.AddAttributes(typeof(T), new TypeConverterAttribute(typeof(TC)));
}
}
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How to get the previous URL in JavaScript?
...want to go to the previous page without knowing the url, you could use the new History api.
history.back(); //Go to the previous page
history.forward(); //Go to the next page in the stack
history.go(index); //Where index could be 1, -1, 56, etc.
But you can't manipulate the content of the history...
Storing images in SQL Server?
...nal filegroup later. Let's call it "LARGE_DATA".
Now, whenever you have a new table to create which needs to store VARCHAR(MAX) or VARBINARY(MAX) columns, you can specify this file group for the large data:
CREATE TABLE dbo.YourTable
(....... define the fields here ......)
ON Data ...
What does this thread join code mean?
...
This is a favorite Java interview question.
Thread t1 = new Thread(new EventThread("e1"));
t1.start();
Thread e2 = new Thread(new EventThread("e2"));
t2.start();
while (true) {
try {
t1.join(); // 1
t2.join(); // 2 These lines (1,2) are in in public static vo...
Display number with leading zeros
...number):
print(format(i, '02d'))
See the PEP-3101 documentation for the new formatting functions.
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