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Using emit vs calling a signal as if it's a regular function in Qt
...ystem is a different idiom than a simple function call. I believe it stems from the observer pattern. There is also a major difference between a signal and a slot: a signal does not have to be implemented, whereas a slot must be!
You are walking down the street and see a house on fire (a signal). Y...
Purpose of Django setting ‘SECRET_KEY’
...it to generate their own signed values.
(This section is also referenced from the Django documentation for the ‘SECRET_KEY’ setting.)
The cryptographic signing API in Django is available to any app for cryptographically-secure signatures on values. Django itself makes use of this in various h...
How can I know when an EditText loses focus?
...ngeListener(this);
then android studio will prompt you to add the method from the interface, accept it...
it will be like:
@Override
public void onFocusChange(View v, boolean hasFocus) {
// todo your code here...
}
and as you've got a factorized code, you'll just have to do that:
@Override
pub...
Choice between vector::resize() and vector::reserve()
...
From your description, it looks like that you want to "reserve" the allocated storage space of vector t_Names.
Take note that resize initialize the newly allocated vector where reserve just allocates but does not construct. ...
Assert an object is a specific type
...
@Carmageddon The answer from Franlin Yu does work fine if you use hamcrest assertion importing: ``` import static org.hamcrest.CoreMatchers.instanceOf; ``` ss per his code samples. I do admit though I overlooked at Franklin answer and in fact, thes...
Java: method to get position of a match in a String?
...ds that does this are:
int indexOf(String str)
indexOf(String str, int fromIndex)
int lastIndexOf(String str)
lastIndexOf(String str, int fromIndex)
Returns the index within this string of the first (or last) occurrence of the specified substring [searching forward (or backward) startin...
How can I modify the size of column in a MySQL table?
...ARCHAR(100) and you change it to VARCHAR(50) it will cut any existing data from columns. As per this specific question though, making a column larger won't have an issue with the data.
– Warren Sergent
Jan 31 '14 at 3:46
...
How to set UICollectionViewDelegateFlowLayout?
...ew.delegate = self;. Note that UICollectionViewDelegateFlowLayout inherits from UICollectionViewDelegate.
I admit it caught me off guard at first.
Oh and this will only work if self.collectionView.collectionViewLayout is actually set to your flow layout. (or set with initWithFrame:collectionViewLayo...
How to get the path of current worksheet in VBA?
...
If you want to get the path of the workbook from where the macro is being executed - use Application.ThisWorkbook.Path.
Application.ActiveWorkbook.Path can sometimes produce unexpected results (e.g. if your macro switches between multiple workbooks).
...
How can I add items to an empty set in python
...Set.
The update method in dictionary is used to update the new dictionary from a previous one, like so,
>>> abc = {1: 2}
>>> d.update(abc)
>>> d
{1: 2}
Whereas in sets, it is used to add elements to the set.
>>> D.update([1, 2])
>>> D
set([1, 2])
...