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Redis strings vs Redis hashes to represent JSON: efficiency?
...mory" => "1251944",
**"used_memory_human" => "1.19M"**, # ~ 72b per key/value
.....
}
> redis.flushdb
=> "OK"
# setting **only one value** +1 byte per hash of 512 values equal to set them all +1 byte
> redis.pipelined{ 10000.times{ |i| redis.me_set( "t...
Why were pandas merges in python faster than data.table merges in R in 2012?
...-+
| q1 | 6.32 | 89.0 | 14 |
| q2 | 5.72 | 108.0 | 18 |
| q3 | 11.00 | 56.9 | 5 |
| q4 | 5.57 | 90.1 | 16 |
| q5 | 30.70 | 731.0 | 23 |
+-----------+--------------+----------+--------+
...
Git for beginners: The definitive practical guide
...g name] [revision SHA1 hash]
For example:
git tag 1.1.1 81b15a68c6c3e71f72e766931df4e6499990385b
Note: by default, git creates a "lightweight" tag (basically a reference to a specific revision). The "right" way is to use the -a flag. This will launch your editor asking for a tag message (iden...
Why is “while ( !feof (file) )” always wrong?
...1:15
fuz
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answered Oct 24 '14 at 22:28
Kerrek SBK...
Using @property versus getters and setters
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72
While I agree in most cases, be careful about hiding slow methods behind a @property decorator. The user of your API expects that property ...
What exactly is a reentrant function?
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CliffordClifford
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a...
Java naming convention for static final variables [duplicate]
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72
That's still a constant. See the JLS for more information regarding the naming convention for c...
Get operating system info
.../wiki/Trident_%28layout_engine%29
https://stackoverflow.com/a/17907562/1415724
http://msdn.microsoft.com/en-us/library/ie/bg182625(v=vs.110).aspx
An article on MSDN Blogs
An article on NCZOnline
Although the edit was rejected (not by myself, but by some of the other editors), it's worth reading up...
Why does X[Y] join of data.tables not allow a full outer join, or a left join?
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72
To quote from the data.table FAQ 1.11 What is the difference between X[Y] and merge(X, Y)?
...
How to automatically generate a stacktrace when my program crashes
...e/dbingham/src/middle-earth-mud/alpha6/src/engine/main.cpp:34(main)[0x8049a72]
/lib/tls/i686/cmov/libc.so.6(__libc_start_main+0xe5)[0xb7d1b775]
/build/buildd/glibc-2.9/csu/../sysdeps/i386/elf/start.S:122(_start)[0x8049801]
If you want to know the gory details, the best source is unfortunately the ...