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What is so bad about singletons? [closed]
...haned by the developer world. I still use quite a lot of singletons, especially for factory classes , and while you have to be a bit careful about multithreading issues (like any class actually), I fail to see why they are so awful.
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How to set a selected option of a dropdown list control using angular JS
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Usually you would set these things in the controller, on the $scope variable. So assuming you're in a single scope, in your controller you could say $scope.item.selectedVariant = 0, to set the default selected value. You could a...
How to add a button to PreferenceScreen
...istView in your layout and give it the ID @android:id/list.
Let's say we call the layout file res/layout/main.xml. It could look something like this:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layou...
Using curl to upload POST data with files
... I think its really useful.
public function postFile()
{
$file_url = "test.txt"; //here is the file route, in this case is on same directory but you can set URL too like "http://examplewebsite.com/test.txt"
$eol = "\r\n"; //default line-break for mime type
$BOUNDARY = m...
find() with nil when there are no records
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Yes, just do:
Challenge.find_by_id(10)
For Rails 4 and 5:
Challenge.find_by(id: 10)
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Append TimeStamp to a File Name
... to a file using the Path class and string manipulation is not an issue at all. this only an alternative to DateTime.ToString Method (String) or string.Format("{0:yyyy-MM-dd_hh-mm-ss-tt}",DateTime.Now);
– Joseph
Jun 26 '17 at 11:50
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Debug vs Release in CMake
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With CMake, it's generally recommended to do an "out of source" build. Create your CMakeLists.txt in the root of your project. Then from the root of your project:
mkdir Release
cd Release
cmake -DCMAKE_BUILD_TYPE=Release ..
make
And for Debug (...
Delegates in swift?
...interface MyCustomClass: UIViewController <ClassIWantToUseDelegate>, allowing you to init/configure the viewcontroller, as well as call delegate methods on the subviews? Something similar to this?
– Mahmud Ahmad
Aug 11 '16 at 22:32
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What are CN, OU, DC in an LDAP search?
...N = Common Name
OU = Organizational Unit
DC = Domain Component
These are all parts of the X.500 Directory Specification, which defines nodes in a LDAP directory.
You can also read up on LDAP data Interchange Format (LDIF), which is an alternate format.
You read it from right to left, the right-m...
How to hide close button in WPF window?
...which means no system menu, even when you right-click the title bar - they all go together.
Note that Alt+F4 will still close the Window. If you don't want to allow the window to close before the background thread is done, then you could also override OnClosing and set Cancel to true, as Gabe sugge...