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Insert, on duplicate update in PostgreSQL?
...
@FrançoisBeausoleil: the chance of a race condition is much smaller than with the "try/handle exception" approach
– a_horse_with_no_name
Feb 21 '12 at 15:32
...
Hidden Features of Xcode
...a big fan of the Open Quickly feature, which is particularly good in Xcode 3.1 and later. When you want to open a file or a symbol definition that's in your project or in a framework, just hit the keyboard shortcut, type a bit of the file or symbol's name, use Up Arrow ↑ and Down Arrow ↓ to pick...
How can I decrease the size of Ratingbar?
... XML code for the RatingBar, use scaleX and scaleY to adjust accordingly. "1.0" would be the normal size, and anything in the ".0" will reduce it, also anything greater than "1.0" will increase it.
<RatingBar
android:id="@+id/ratingBar1"
android:layout_width="wrap_content"
android:layout_h...
How do you create an asynchronous method in C#?
... To support such a paradigm with Tasks, we need a way to retain the Task façade and the ability to refer to an arbitrary asynchronous operation as a Task, but to control the lifetime of that Task according to the rules of the underlying infrastructure that’s providing the asynchrony, and to do so...
Converting pixels to dp
...loat dp = somePxValue / density;
density equals
.75 on ldpi (120 dpi)
1.0 on mdpi (160 dpi; baseline)
1.5 on hdpi (240 dpi)
2.0 on xhdpi (320 dpi)
3.0 on xxhdpi (480 dpi)
4.0 on xxxhdpi (640 dpi)
Use this online converter to play around with dpi values.
EDIT:
It seems there is no 1:1 rel...
What's the simplest way to print a Java array?
...], [Alice, Bob]]
double Array:
double[] doubleArray = { 7.0, 9.0, 5.0, 1.0, 3.0 };
System.out.println(Arrays.toString(doubleArray));
Output:
[7.0, 9.0, 5.0, 1.0, 3.0 ]
int Array:
int[] intArray = { 7, 9, 5, 1, 3 };
System.out.println(Arrays.toString(intArray));
Output:
[7, ...
The simplest way to resize an UIImage?
...pixel scaling factor (and thus account for Retina resolution).
// Pass 1.0 to force exact pixel size.
UIGraphicsBeginImageContextWithOptions(newSize, NO, 0.0);
[image drawInRect:CGRectMake(0, 0, newSize.width, newSize.height)];
UIImage *newImage = UIGraphicsGetImageFromCurrentImageCo...
Android Studio 0.4 Duplicate files copied in APK META-INF/LICENSE.txt
...n 7
targetSdkVersion 10
versionCode 1
versionName "1.0"
}
buildTypes {
release {
runProguard false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard- rules.txt'
}
packagingOptions {
exclude 'ME...
cmake and libpthread
...e. You can add the compiler option as well, like this:
If you have CMake 3.1.0+, this becomes even easier:
set(THREADS_PREFER_PTHREAD_FLAG ON)
find_package(Threads REQUIRED)
target_link_libraries(my_app PRIVATE Threads::Threads)
If you are using CMake 2.8.12+, you can simplify this to:
find_pa...
Using multiple property files (via PropertyPlaceholderConfigurer) in multiple projects/modules
...esPlaceholderConfigurer is the default backing implementation since Spring 3.1, so it's sensible to use instead of PropertyPlaceholderConfigurer as the bean implementation class.
– jihor
Jan 28 '18 at 17:45
...