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What are static factory methods?
...
We avoid providing direct access to database connections because they're resource intensive. So we use a static factory method getDbConnection that creates a connection if we're below the limit. Otherwise, it tries to provide a "s...
How to use SharedPreferences in Android to store, fetch and edit values [closed]
...ate();
prefs.edit().putLong(dateTimeKey, dt.getTime()).apply();
The android sdk's sample directory contains an example of retrieving and storing shared preferences. Its located in the:
<android-sdk-home>/samples/android-<platformversion>/ApiDemos directory
Edit==>
I noticed, it ...
RSpec: What is the difference between a feature and a request spec?
... I use both, @robertwbradford. I use feature specs to drive my outside in tests - testing the user experience and then building out the functionality using unit tests. I use request specs for testing responses - e.g. in a sessions_spec I may have a describe "GET /login" block with expectatio...
Programmatically saving image to Django ImageField
...ile # you need this somewhere
import urllib
# The following actually resides in a method of my model
result = urllib.urlretrieve(image_url) # image_url is a URL to an image
# self.photo is the ImageField
self.photo.save(
os.path.basename(self.url),
File(open(result[0], 'rb'))
)
sel...
Using Enum values as String literals
...stant, exactly as declared in its enum declaration.
Option Two: add overriding properties to your enums if you want more control
public enum Modes {
mode1 ("Fancy Mode 1"),
mode2 ("Fancy Mode 2"),
mode3 ("Fancy Mode 3");
private final String name;
private Modes(String...
Diff two tabs in Vim
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The content of all tabs are inside the buffers.
Look at the buffers:
:buffers
Find the right number for the content which should be diffed with your current tab content.
Open the buffer inside your current tab (f.e. buffer number 4)
:sb 4
Or do for ...
@media media query and ASP.NET MVC razor syntax clash
... symbols. That will escape @ symbol and render @media correctly on client side
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How can I use 'Not Like' operator in MongoDB
...s regular expression capability to create regular expression
objects. Consider the following example which uses the pattern match
expression //:
db.inventory.find( { item: { $not: /^p.*/ } } )
EDIT (@idbentley):
{$regex: 'ttt'} is generally equivalent to /ttt/ in mongodb, so your query would becom...
What is the purpose of a plus symbol before a variable?
...34",1,true);
then the +d will evaluate to a number in all cases. Thus avoiding the need to check for the type and take different code paths depending on whether d is a number, a function or a string that can be converted to a number.
...
What's the difference setting Embed Interop Types true and false in Visual Studio?
...s (Primary Interop Assemblies) for interop.
It simply embeds the managed bridging code used that allows you to talk to unmanaged assemblies, but instead of embedding it all it only creates the stuff you actually use in code.
Read more in Scott Hanselman's blog post about it and other VS improvements...