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Entity Framework: There is already an open DataReader associated with this Command
...eader is executed before first one has completed the reading. The only way to avoid the exception is to allow multiple nested DataReaders = turn on MultipleActiveResultSets. Another scenario when this always happens is when you iterate through result of the query (IQueryable) and you will trigger la...
Should I use multiplication or division?
... 0m0.000s
=>it's only 5% faster
conclusions: in Python it's faster to multiply than to divide, but as you get closer to the CPU using more advanced VMs or JITs, the advantage disappears. It's quite possible that a future Python VM would make it irrelevant
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How to shrink/purge ibdata1 file in MySQL
I am using MySQL in localhost as a "query tool" for performing statistics in R, that is, everytime I run a R script, I create a new database (A), create a new table (B), import the data into B, submit a query to get what I need, and then I drop B and drop A.
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How to set a Django model field's default value to a function call / callable (e.g., a date relative
...tetime import datetime, timedelta
class MyModel(models.Model):
# default to 1 day from now
my_date = models.DateTimeField(default=datetime.now() + timedelta(days=1))
This last line is not defining a function; it is invoking a function to create a field in the class.
PRE Django 1.7
Django le...
Can I use jQuery with Node.js?
Is it possible to use jQuery selectors/DOM manipulation on the server-side using Node.js?
21 Answers
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Converting an object to a string
How can I convert a JavaScript object into a string?
36 Answers
36
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How to assert output with nosetest/unittest in python?
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I use this context manager to capture output. It ultimately uses the same technique as some of the other answers by temporarily replacing sys.stdout. I prefer the context manager because it wraps all the bookkeeping into a single function, so I don't h...
Should I make HTML Anchors with 'name' or 'id'?
When one wants to refer to some part of a webpage with the " http://example.com/#foo " method, should one use
14 Answers
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How can I let a table's body scroll but keep its head fixed in place?
I am writing a page where I need an HTML table to maintain a set size. I need the headers at the top of the table to stay there at all times but I also need the body of the table to scroll no matter how many rows are added to the table. Think a mini version of excel. This seems like a simple task bu...
Should I inherit from std::exception?
I've seen at least one reliable source (a C++ class I took) recommend that application-specific exception classes in C++ should inherit from std::exception . I'm not clear on the benefits of this approach.
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