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Django FileField with upload_to determined at runtime
...posed to having everyone's files go to MEDIA_ROOT. The problem is I don't know how to define this in the model. Here is how it currently looks:
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How to set -source 1.7 in Android Studio and Gradle
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Java 7 support was added at build tools 19. You can now use features like the diamond operator, multi-catch, try-with-resources, strings in switches, etc. Add the following to your build.gradle.
android {
compileSdkVersion 19
buildToolsVersion "19.0.0"
defaultCon...
How can I scale an image in a CSS sprite
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hi @Robert. How about now?
– Tomasz Mularczyk
Aug 23 '17 at 6:32
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Database sharding vs partitioning
... multiple instances or servers, using some kind of logic or identifier to know which instance or server to look for the data. An identifier of this kind is often called a "Shard Key".
A common, key-less logic is to use the alphabet to divide the data. A-D is instance 1, E-G is instance 2 etc. Custo...
PostgreSQL: How to pass parameters from command line?
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Just note that now the foo is busy and another PREPARE should have another name while current session isn't closed. If you play with PREPARE into psql it's hard to invent each time a new name and DEALLOCATE can help with it =)
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What can I do to resolve a “Row not found or changed” Exception in LINQ to SQL on a SQL Server Compa
...pping, LINQ will load it successfully and set the column-String to null.
Now you change something and call
SubmitChanges().
LINQ will generate a SQL query
containing "WHERE [title] IS NULL", to make sure the title has not been changed by someone else.
LINQ looks up the properties of
[title] in the...
How to Generate unique file names in C#
... exists), I fall back to GUIDs.
Update:
Recently, I've also use DateTime.Now.Ticks instead of GUIDs:
var myUniqueFileName = string.Format(@"{0}.txt", DateTime.Now.Ticks);
or
var myUniqueFileName = $@"{DateTime.Now.Ticks}.txt";
The benefit to me is that this generates a shorter and "nicer loo...
ValueError: setting an array element with a sequence
...itrary Python objects:
numpy.array([1.2, "abc"], dtype=object)
Without knowing what your code shall accomplish, I can't judge if this is what you want.
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Get button click inside UITableViewCell
...ay to go.
As seen with other answers using views might get outdated. Who knows tomorrow there might be another wrapper and may need to use cell superview]superview]superview]superview]. And if you use tags you would end up with n number of if else conditions to identify the cell. To avoid all of th...
When should I use C++ private inheritance?
... +1 Iraimbilanja, very cool! BTW I saw your earlier comment (now deleted) about using the CRTP: I think that should in fact work, it's just tricky to get the syntax for template friends right. But in any case your non-template solution is much more awesome :)
– j_...