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Database sharding vs partitioning
... use the alphabet to divide the data. A-D is instance 1, E-G is instance 2 etc. Customer data is well suited for this, but will be somewhat misrepresented in size across instances if the partitioning does not take in to account that some letters are more common than others.
Another common technique...
What should every JavaScript programmer know? [closed]
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Not jQuery. Not YUI. Not (etc. etc.)
Frameworks may be useful, but they are often hiding the sometimes-ugly details of how JavaScript and the DOM actually work from you. If your aim is to be able to say “I know JavaScript”, then investing a lot o...
C# How can I check if a URL exists/is valid?
...dynamic service like stock price. For static resources (e.g. images, files etc) HEAD usually works as advertised since it is baked into the server. Many programmers do not explicitly HEAD requests since the focus is normally on POST and GET. YMMV
– David Taylor
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How do you create a read-only user in PostgreSQL?
...test versions of PostgreSQL, you can grant permissions on all tables/views/etc in the schema using a single command rather than having to type them one by one:
GRANT SELECT ON ALL TABLES IN SCHEMA public TO xxx;
This only affects tables that have already been created. More powerfully, you can aut...
How to make vim paste from (and copy to) system's clipboard?
...ple what is one doing with "*p? Do I press Shift-', then Shift-8, then p, etc.?
– T. Brian Jones
Nov 7 '13 at 2:09
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How to install both Python 2.x and Python 3.x in Windows
...chosen like so:
py -2 for the second python
py -3 for the third python etc..
No matter the order of "pythons" you can:
run Python 2.x scripts using the command: py -2 (Python 3.x functionality) (ie. the first Python 2.x installation program found in your PATH will be selected)
run Python 3...
What's the difference between RSpec and Cucumber? [closed]
...ur model is supposed to do, the controller does what it is supposed to do, etc).
RSpec and Cucumber both are used for Acceptance Testing (Which is called ATDD, BDD, Specification by Example, etc depending on who you ask). These are business-case driven Integration Tests, which mean they simulate th...
How to duplicate sys.stdout to a log file?
...ty to write to multiple log files at once, or handle different log levels, etc.
These are all straightforward enough that I'm comfortable leaving them as exercises for the reader. The key insight here is that print just calls a "file-like object" that's assigned to sys.stdout.
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What is the difference between sql and mysql [closed]
...what universal - Selects usually look the same, Inserts, Updates, Deletes, etc. Once you get beyond the basics, the commands and abilities of your individual Databases vary, and this is where you get people who are Oracle experts, MySQL, SQL Server, etc.
Basically, MySQL is one of many books holdi...
Difference between /res and /assets directories
...ng alternatives for different languages, OS versions, screen orientations, etc., as described here. None of that is available with assets. Also, many parts of the API support the use of resource identifiers. Finally, the names of the resources are turned into constant field names that are checked at...