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Difference between Django's annotate and aggregate methods?
...gt; q = Book.objects.annotate(num_authors=Count('authors'))
>>> q[0].num_authors
2
>>> q[1].num_authors
1
q is the queryset of books, but each book has been annotated with the number of authors.
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String.Join method that ignores empty strings?
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ᴍᴀᴛᴛ ʙᴀᴋᴇʀ
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answered May 1 '13 at 20:36
DamithDamith
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Guid is all 0's (zeros)?
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answered Nov 1 '11 at 20:00
Mark ByersMark Byers
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Set width of TextView in terms of characters
...points out.
– Jonik
Dec 9 '14 at 13:07
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Performance - Date.now() vs Date.getTime()
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106
These things are the same (edit semantically; performance is a little better with .now()):
var...
List View Filter Android
...s);
}
@Override
public void beforeTextChanged(CharSequence arg0, int arg1, int arg2, int arg3) { }
@Override
public void afterTextChanged(Editable arg0) {}
});
The basic here is to add an OnTextChangeListener to your edit text and inside its callback method apply filter to yo...
How do I make jQuery wait for an Ajax call to finish before it returns?
...type: 'GET',
async: false,
cache: false,
timeout: 30000,
fail: function(){
return true;
},
done: function(msg){
if (parseFloat(msg)){
return false;
} else {
return true;
}...
No startswith,endswith functions in Go?
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edited Nov 6 '12 at 4:05
answered Nov 6 '12 at 3:49
Kyl...
What is a Context Free Grammar?
...le of a formal language is the set of all binary strings of length three, {000, 001, 010, 011, 100, 101, 110, 111}.
Grammars work by defining transformations you can make to construct a string in the language described by a grammar. Grammars will say how to transform a start symbol (usually S) into...
How to add a vertical Separator?
...er!
– Tatranskymedved
May 9 '17 at 10:34
Works perfectly well in both horizontal and vertical Menu between MenuItems a...