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How update the _id of one MongoDB Document?
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A fun issue with this appears if some field on that document has a unique index. In that situation, your example will fail because a document cannot be inserted with a duplicate value in a unique indexed field. You could fix this by doing the de...
How to set default values in Rails?
...use the same default to be set in any model using it in any standard Rails app.
However, if you only want default values set in specific cases -- say, it's an inherited model that shares a table with some others -- then another elegant way is do it directly in your Rails code when the model object ...
Bulk insert with SQLAlchemy ORM
...e in performance on the server side resulting in about 10x more inserts/s. Apparently is bulk-loading using \copy (or COPY on the server) using a packing in communicating from client-to-server a LOT better than using SQL via SQLAlchemy. More info: Large bulk insert performance difference PostgreSQL ...
Importing from a relative path in Python
... list of paths python looks at to import things):
import sys, os
sys.path.append(os.path.join(os.path.dirname(__file__), '..', 'Common'))
import Common
os.path.dirname(__file__) just gives you the directory that your current python file is in, and then we navigate to 'Common/' the directory and i...
How do I do base64 encoding on iOS?
...opy = 3;
break;
}
for (i = 0; i < ctcopy; i++)
[result appendString: [NSString stringWithFormat: @"%c", base64EncodingTable[output[i]]]];
for (i = ctcopy; i < 4; i++)
[result appendString: @"="];
ixtext += 3;
charsonline += 4;
if ((length > 0) && (ch...
Dispelling the UIImage imageNamed: FUD
...ageNamed in your code. Now, for posterity's sake:
The sister thread on the Apple Dev Forums received some better traffic. Specifically Rincewind added some authority.
There are issues in iPhone OS 2.x where the imageNamed: cache would not be cleared, even after a memory warning. At the same time +i...
Best way to represent a Grid or Table in AngularJS with Bootstrap 3? [closed]
I am creating an App with AngularJS and Bootstrap 3. I want to show a table/grid with thousands of rows. What is the best available control for AngularJS & Bootstrap with features like Sorting, Searching, Pagination etc.
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android fragment- How to save states of views in a fragment when another fragment is pushed on top o
... it doesn't call onSaveInstanceState - why would it ? So, this approach doesn't work.
– midnight
Dec 29 '12 at 9:34
10
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Java - Method name collision in interface implementation
...d ? I cannot even expect client code to be able to cast my instance to the appropriate interface , so am I not loosing something by this restriction ? Also note that in this way , when writing classes that actually implement the respective interfaces , we loose the benefit of having the code into a ...
List of macOS text editors and code editors [closed]
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I use SubEthaEdit. I'm still happy with it, and whilst I've looked at TextMate, there's never been a real reason for me to change.
– Matthew Schinckel
Jan 20 '09 at 22:59
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