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Rails find record with zero has_many records associated [duplicate]
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Bah, found it here: https://stackoverflow.com/a/5570221/417872
City.includes(:photos).where(photos: { city_id: nil })
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Incomplete type is not allowed: stringstream
...defined.
– mireazma
Feb 19 '15 at 8:03
I think visual studio sometimes allows to use stringstream without including th...
How to add new line into txt file
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270
You could do it easily using
File.AppendAllText("date.txt", DateTime.Now.ToString());
If you ...
Template function inside template class
...BKerrek SB
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GMSGroundOverlay animating - should I be using a CATiledLayer?
...rray *longitudes = [NSMutableArray arrayWithCapacity:21];
for (int i = 0; i <= 20; i++) {
CGFloat radians = (float)i * ((2.0f * M_PI) / 20.0f);
// Calculate the x,y coordinate using the angle
CGFloat x = hDist * cosf(radians);
CGFloat y = vDist * sinf(radians)...
Insert Unicode character into JavaScript
...ontaining an uppercase omega? In that case, you can write:
var Omega = '\u03A9';
(Because Ω is the Unicode character with codepoint U+03A9; that is, 03A9 is 937, except written as four hexadecimal digits.)
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LINQ - Left Join, Group By, and Count
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answered Mar 29 '09 at 22:28
Mehrdad AfshariMehrdad Afshari
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Persistent invalid graphics state error when using ggplot2
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– Pedro Cavalcante
Sep 14 '18 at 20:38
2
@PedroCavalcanteOliveira I had the problem, after I us...
Python 3 turn range to a list
I'm trying to make a list with numbers 1-1000 in it. Obviously this would be annoying to write/read, so I'm attempting to make a list with a range in it. In Python 2 it seems that:
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Check if key exists and iterate the JSON array using Python
..., "name": "Mary Pinter"}, "message": "How ARE you?", "comments": {"count": 0}, "updated_time": "2012-05-01", "created_time": "2012-05-01", "to": {"data": [{"id": "1543", "name": "Honey Pinter"}]}, "type": "status", "id": "id_7"}"""
def getTargetIds(jsonData):
data = json.loads(jsonData)
if ...