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PDO MySQL: Use PDO::ATTR_EMULATE_PREPARES or not?
... it is cacheable..." dev.mysql.com/doc/refman/5.1/en/query-cache-in-select.html
– Andrew Ensley
May 4 '12 at 17:25
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Facebook database design?
... basics are understood. orientdb.com/docs/2.1/Tutorial-Working-with-graphs.html If you want to use a relational DB as foundation then you just need to add some code in your "after save" and "after delete" callbacks to update your graph DB (which you would use for reading data). If you don't have suc...
How does facebook, gmail send the real time notification?
... implementing push message service. developer.android.com/google/gcm/index.html Please accept if you find the answer useful.
– abhi
Jul 20 '13 at 15:53
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What is a memory fence?
...ry storage model. [1]: ibm.com/developerworks/systems/articles/powerpc.html
– Iouri Goussev
Oct 2 '11 at 21:20
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Express.js - app.listen vs server.listen
...spond to HTTP Requests (easily) using express.
They can dynamically render HTML Pages based on passing arguments to templates using express.
They can also define routing easily using express.
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Need to understand the usage of SemaphoreSlim
...fer.
http://www.tomdupont.net/2016/03/how-to-release-semaphore-with-using.html
I did swap _isDisposed=true and _semaphore.Release() around in its Dispose though in case it somehow got called multiple times.
Also it is important to note SemaphoreSlim is not a reentrant lock, meaning if the same t...
Is it possible to roll back CREATE TABLE and ALTER TABLE statements in major SQL databases?
...at transaction."
https://dev.mysql.com/doc/refman/5.7/en/implicit-commit.html
Tried a few different ways and it simply won't roll back..
Work around is to simply set a failure flag and do "drop table tblname" if one of the queries failed..
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Difference between local and global indexes in DynamoDB
.../docs.aws.amazon.com/amazondynamodb/latest/developerguide/SecondaryIndexes.html
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What exactly is Python's file.flush() doing?
...th os.fsync() in those cases.
[1] http://docs.python.org/library/stdtypes.html
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Specifying and saving a figure with exact size in pixels
...on here: https://matplotlib.org/3.2.1/api/_as_gen/matplotlib.pyplot.imsave.html
#file_path = directory address where the image will be stored along with file name and extension
#array = variable where the image is stored. I think for the original post this variable is im_np
plt.imsave(file_path, ar...