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Why should you use an ORM? [closed]
If you are motivate to the "pros" of an ORM and why would you use an ORM to management/client, what are those reasons would be?
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Does MySQL foreign_key_checks affect the entire database?
When I execute this command in MySQL:
6 Answers
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Define global variable in a JavaScript function
...object. (In the latest specification, ECMAScript 2015, the new let, const, and class statements at global scope create globals that aren't properties of the global object; a new concept in ES2015.)
(There's also the horror of implicit globals, but don't do it on purpose and do your best to avoid do...
How does BLAS get such extreme performance?
...k The Science of Programming Matrix Computations by Robert A. van de Geijn and Enrique S. Quintana-Ortí. They provide a free download version.
BLAS is divided into three levels:
Level 1 defines a set of linear algebra functions that operate on vectors only. These functions benefit from vectoriza...
Should I return a Collection or a Stream?
...d collection will be. It depends on whether the result changes over time, and how important consistency of the returned result is. And it depends very much on how the user is likely to use the answer.
First, note that you can always get a Collection from a Stream, and vice versa:
// If API returns...
Should I use 'has_key()' or 'in' on Python dicts?
...ng, I didn't see that. I suppose it's because x in d.keys() must construct and destroy a temporary object, complete with the memory allocation that entails, where x in d.keys() is just doing an arithmetic operation (computing the hash) and doing a lookup. Note that d.keys() is only about 10 times as...
Java equivalent of C#'s verbatim strings with @
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i love c# 6 with @"string" and $"string{i}" and very futures more than java
– Guido Mocha
May 11 '17 at 7:39
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Processing Symbol Files in Xcode
... so it becomes possible to debug on devices with that specific iOS version and also to symbolicate crash reports that happened on that iOS version.
Since symbols are CPU specific, the above only works if you have imported the symbols not only for a specific iOS device but also for a specific CPU ty...
How do I update pip itself from inside my virtual environment?
...ng to pip --version , I currently have pip 1.1 installed in my virtualenv and I want to update to the latest version.
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Extending the User model with custom fields in Django
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The least painful and indeed Django-recommended way of doing this is through a OneToOneField(User) property.
Extending the existing User model
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If you wish to store information related to User, you can use a one-to-one relationship to a mo...