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What is the “N+1 selects problem” in ORM (Object-Relational Mapping)?
The "N+1 selects problem" is generally stated as a problem in Object-Relational mapping (ORM) discussions, and I understand that it has something to do with having to make a lot of database queries for something that seems simple in the object world.
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LINQ: Select an object and change some properties without creating a new object
...erties of a LINQ query result object without creating a new object and manually setting every property. Is this possible?
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What's the difference between a Python “property” and “attribute”?
I am generally confused about the difference between a "property" and an "attribute", and can't find a great resource to concisely detail the differences.
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jQuery: Select data attributes that aren't empty?
I'm trying to select all elements that have a data-go-to attribute that is not empty.
11 Answers
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Open link in new tab or window [duplicate]
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It shouldn't be your call to decide whether the link should open in a new tab or a new window, since ultimately this choice should be done by the settings of the user's browser. Some people like tabs; some like new windows.
Using _blank will tell...
Equivalent of “throw” in R
...them. If the columns don't exist, I want the function to stop and to stop all functions depending on it.
5 Answers
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Python nested functions variable scoping [duplicate]
I've read almost all the other questions about the topic, but my code still doesn't work.
10 Answers
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Get ID of last inserted document in a mongoDB w/ Java driver
...h MongoDB plainly auto-generates ObjectId's. However, your solution of manually creating an ObjectId does work, and thanks for this option!
– Apophenia Overload
Dec 4 '12 at 8:39
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Python ValueError: too many values to unpack [duplicate]
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for k, m in self.materials.items():
example:
miles_dict = {'Monday':1, 'Tuesday':2.3, 'Wednesday':3.5, 'Thursday':0.9}
for k, v in miles_dict.items():
print("%s: %s" % (k, v))
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Deleting a Google App Engine application
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You can send them an email if you REALLY want the ID. They can give it back for a specific project. I haven't personally done it but I saw people in google groups saying it's possible
– Patrice
Jul 31 '14 at 16:13
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