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Approximate cost to access various caches and main memory?
Can anyone give me the approximate time (in nanoseconds) to access L1, L2 and L3 caches, as well as main memory on Intel i7 processors?
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How to move a model between two Django apps (Django 1.7)
...eld. Then run python manage.py makemigrations
After doing Ozan's steps, re-convert your foreign keys: put back ForeignKey(TheModel)instead of IntegerField(). Then make the migrations again (python manage.py makemigrations). You can then migrate and it should work (python manage.py migrate)
Hope it...
How to search file text for a pattern and replace it with a given value
...en you try to mv the file across a device mount you will transparently get converted to cp behavior. The old file will be opened, the old files inode will be preserved and reopened and the file contents will be copied. This is most likely not what you want, and you may run into "text file busy" err...
How to add a custom right-click menu to a webpage?
.... It's very useful and the same jQuery used in this answer could easily be converted to standard JavaScript commands. It may not be 100% inline with the request in the original question, but it's definitely 95% inline with it.
– The Duke Of Marshall שלום
Ap...
React.js: Wrapping one component into another
...es, sometimes not. Choose wisely and don't bindly follow the 2018 trend of converting everything to render-props.
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Make a number a percentage
What's the best way to strip the "0."XXX% off a number and make it a percentage? What happens if the number happens to be an int?
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使用虚拟现实和App Inventor进行实验 · App Inventor 2 中文网
...助应用程序，用于管理与 Cardboard 库的交互。具有 Java 和 Android 经验的开发人员可以将其用作指南，为 App Inventor 社区创建更丰富的 Cardboard 集成可能性。开发人员还应注意，刚刚发布的 Android 系统 7 (Nougat) 包含 Google 的 Daydream VR ...
Which kind of pointer do I use when?
...wrote C++ for a living, std::auto_ptr was all the std lib had available, and boost::shared_ptr was all the rage. I never really looked into the other smart pointer types boost provided. I understand that C++11 now provides some of the types boost came up with, but not all of them.
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How to use Elasticsearch with MongoDB?
...= 1; i <= 25; i++) db.YOUR_COLLECTION_NAME.insert( { x : i } )
Now to Convert the standalone MongoDB into a Replica Set.
First Shutdown the process.
mongo YOUR_DATABASE_NAME
use admin
db.shutdownServer()
Now we're running MongoDB as a service, so we don't pass in the "--replSet rs0" option ...
How to decide when to use Node.js?
...ieved with any other language and server. So for those who are thinking to convert their web projects in node. Think again its the same thing! Use the node as a background process like reading emails with imap, image processing, uploading files to cloud, or any lengthy or never ending processes whic...