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Entity Framework - Start Over - Undo/Rollback All Migrations
...rations by using the second or third command, then delete MigrationHistory table and all migration related code. It should get you to starting position. You can also get starting database from backup (before using migrations) and delete all migration related code.
– Ladislav Mr...
Why does ReSharper tell me “implicitly captured closure”?
... use.
The compiler generates a class for both lambda expressions and puts all variables in that class which are used in the lambda expressions.
So in my example g and i are held in the same class for execution of my delegates. If g is a heavy object with a lot of resources left behind, the garbage...
What is the difference between pluck and collect in Rails?
...asting memory and time. Because it will retrieve all the columns from user table in the database, allocates the memory for each attributes (including the attributes which you will never use)
NOTE: pluck does not return ActiveRecord_Relation of the user
...
Do try/catch blocks hurt performance when exceptions are not thrown?
... {
Console.WriteLine(ex.ToString());
}
finally
{
d = Math.Sin(d);
}
}
w.Stop();
Console.Write(" try/catch/finally: ");
Console.WriteLine(w.ElapsedMilliseconds);
w.Reset();
d = 0;
w.Start();
for (int i = ...
what does the __file__ variable mean/do?
I usually just hard-wire these with the actual path. But there is a reason for these statements that determine path at runtime, and I would really like to understand the os.path module so that I can start using it.
...
Deleting lines from one file which are in another file
...the entry for that line, no need to set a value.
Assuming awk uses a hash table with constant lookup and (on average) constant update time, the time complexity of this will be O(n + m), where n and m are the lengths of the files. In my case, n was ~25 million and m ~14000. The awk solution was much...
What is the GAC in .NET?
...
Right, so basically it's a way to keep DLLs globally accessible without worrying about conflicts. No more DLL Hell. Each architecture and version gets it's own place to live.
It also gets it own way to browse it in Explorer, so if you go...
Select records from NOW() -1 Day
...
Sure you can:
SELECT * FROM table
WHERE DateStamp > DATE_ADD(NOW(), INTERVAL -1 DAY)
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Get exception description and stack trace which caused an exception, all as a string
...
See the traceback module, specifically the format_exc() function. Here.
import traceback
try:
raise ValueError
except ValueError:
tb = traceback.format_exc()
else:
tb = "No error"
finally:
print tb
...
How to fix UITableView separator on iOS 7? [duplicate]
UITableView draws with ragged lines on iOS 7:
2 Answers
2
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