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What is an OS kernel ? How does it differ from an operating system? [closed]
...definition of an operating system is "a platform that consists of specific set of libraries and infrastructure for applications to be built upon and interact with each other". A kernel is an operating system in that sense.
The end-user definition is usually something around "a software package that...
Equivalent C++ to Python generator pattern
... closest thing in native C++ is threads. A thread can maintain a suspended set of local variables, and can continue execution where it left off, very much like generators, but you need to roll a little bit of additional infrastructure to support communication between the generator object and its cal...
Image fingerprint to compare similarity of many images
I need to create fingerprints of many images (about 100.000 existing, 1000 new per day, RGB, JPEG, max size 800x800) to compare every image to every other image very fast. I can't use binary compare methods because also images which are nearly similar should be recognized.
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Django CharField vs TextField
... editor after snippets, if snippets enabled
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Add number of days to a date
I want to add number of days to current date:
I am using following code:
19 Answers
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Is it possible to preview stash contents in git?
I often put work away for later, then other stuff comes along, and a few weeks later, I want to inspect the stash, and find out what changes it would make if I applied it to working tree in its current state.
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xtree(1796): warning C4800: “int”: 将值强制为布尔值“true”或“false...
...e(1796): warning C4800: “int”: 将值强制为布尔值“true”或“false”(性能警告) 1>C: Program Files (x86) Microsoft Visual Studio 11.0 VC include xtree(1796): warning C4800: int: 将值强制为布尔值true或f...1>C:\Program Files (x86)\Microsoft Visual Studio 11.0\VC\include...
When to use Amazon Cloudfront or S3
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Be aware that Cloudfront evicts content very quickly. Setting max-age to more than a day does not mean you content will not be evicted if it hasn't been touched for 61 minutes. Not much use for user specific content as that amounts to infrequent access.
– B...
Are soft deletes a good idea? [duplicate]
...'t want to go running to the archives to restore their data. You'd like to set is_deleted = false. This is a fairly primitive (and unlikely) scenario as you'd probably use a disabled field - but the point is the same. For some cases, to be able to recover the deleted data instantly could be worthwhi...
How to add texture to fill colors in ggplot2
...of both. Firstly draw the vertical lines and then add the horizontal lines setting fill as fill='transparent' to ensure the vertical lines are not drawn over.
Until there is a pattern update I hope some of you find this useful.
EDIT 2:
Additionally diagonal patterns may also be added. I added an ...