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How can a Javascript object refer to values in itself? [duplicate]
... In ES6 you can replace key2 : function() {...} with get key2() {...} and then you don't need to use brackets when calling it: alert(obj.key2);
– user993683
Dec 6 '16 at 5:54
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Make footer stick to bottom of page correctly [duplicate]
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-1 coz then your footer will follow you as you scroll
– Shalom Sam
May 27 '13 at 11:43
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Numpy: Get random set of rows from 2D array
...= np.random.choice(A.shape[0], amount_of_samples, replace=False)
You can then use slicing with your numpy array to get the samples at those indices:
A[indices]
This will get you the specified number of random samples from your data.
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Two way/reverse map [duplicate]
... where I need to keep track of who's talking to whom, so if Alice --> Bob, then that implies that Bob --> Alice.
15 Answer...
findViewByID returns null
...View to main2, so the R.id.textview1 became available for the rest of app. Then I tried to fetch it by standard calling:
TextView tv = (TextView) findViewById( R.id.textview1 );
and it was always null. It turned out, that in onCreate constructor I was instantiating not main2, but the other one. ...
Can I use a function for a default value in MySql?
..._app_users
BEFORE INSERT ON app_users
FOR EACH ROW
IF new.uuid IS NULL
THEN
SET new.uuid = uuid();
END IF;
You still have to update previously existing rows, like this:
UPDATE app_users SET uuid = (SELECT uuid());
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In C#, how to instantiate a passed generic type inside a method?
... where T : IPerson, new()
Notice the additional constraint at the end. Then create a new instance in the method body:
T obj = new T();
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convert an enum to another type of enum
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Given Enum1 value = ..., then if you mean by name:
Enum2 value2 = (Enum2) Enum.Parse(typeof(Enum2), value.ToString());
If you mean by numeric value, you can usually just cast:
Enum2 value2 = (Enum2)value;
(with the cast, you might want to use E...
Efficient SQL test query or validation query that will work across all (or most) databases
... of the above is to create a table called DUAL that contains a single row, then the above will work.
HSQLDB supports neither of the above, so you can either create the DUAL table or else use:
SELECT 1 FROM any_table_that_you_know_exists_in_your_database
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Why do this() and super() have to be the first statement in a constructor?
...hose args inline as you are doing, or pass them in to your constructor and then pass them to super:
public MySubClassB extends MyClass {
public MySubClassB(Object[] myArray) {
super(myArray);
}
}
If the compiler did not enforce this you could do this:
public MySub...