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Collections.emptyList() returns a List?
...nt, the compiler can figure out the generic type parameters for you. It's called type inference. For example, if you did this:
public Person(String name) {
List<String> emptyList = Collections.emptyList();
this(name, emptyList);
}
then the emptyList() call would correctly return a Lis...
Android 4.3 Bluetooth Low Energy unstable
...nect and create a fresh instance of gatt on each connect.
Don't forget to call android.bluetooth.BluetoothGatt#close()
Start a new thread inside onLeScan(..) and then connect. Reason: BluetoothDevice#connectGatt(Context context, boolean autoConnect, BluetoothGattCallback callback) always fails, if...
What is Mocking?
...ck is like a stub but the test will also verify that the object under test calls the mock as expected. Part of the test is verifying that the mock was used correctly.
To give an example: You can stub a database by implementing a simple in-memory structure for storing records. The object under test c...
How to pass the values from one activity to previous activity
...the entered text value in its extras bundle. To pass it back to the parent call setResult before calling finish to close the secondary Activity.
Intent resultIntent = new Intent();
resultIntent.putExtra(PUBLIC_STATIC_STRING_IDENTIFIER, enteredTextValue);
setResult(Activity.RESULT_OK, resultIntent);...
PowerMockito mock single static method and return object
... supplies a default strategy for what Mockito/PowerMock should do when you call a method you haven't explicitly stubbed on the mock instance.
From the javadoc:
Creates class mock with a specified strategy for its answers to
interactions. It's quite advanced feature and typically you don't nee...
Jackson serialization: ignore empty values (or null)
...TY
The other option is to configure the ObjectMapper directly, simply by calling
mapper.setSerializationInclusion(Include.NON_NULL);
(for the record, I think the popularity of this answer is an indication that this annotation should be applicable on a field-by-field basis, @fasterxml)
...
Why is list initialization (using curly braces) better than the alternatives?
...
Basically copying and pasting from Bjarne Stroustrup's "The C++ Programming Language 4th Edition":
List initialization does not allow narrowing (§iso.8.5.4). That is:
An integer cannot be converted to another integer that can...
Order discrete x scale by frequency/value
...nd reorder changes characteristics of the data, albeit within the ggplot() call, and so does more than it need do for the problem at hand.
– mjandrews
Nov 22 '18 at 17:38
2
...
How to getText on an input in protractor
...k we have kept it in a common function like -
getText : function(element, callback) {
element.getText().then (function(text){
callback(text);
});
},
By this you can have the text of an element.
Let me know if it is still unclear.
...
Jquery selector input[type=text]')
I wrote a code that basically selects all input type=text element like this:
4 Answers
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