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When should one use RxJava Observable and when simple Callback on Android?
... Santanu Sur
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answered Apr 28 '15 at 11:34
NielsNiels
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How to change Rails 3 server default port in develoment?
On my development machine, I use port 10524. So I start my server this way :
9 Answers
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Simple way to calculate median with MySQL
...2),FLOOR((3+2)/2); -- when total_rows is 3, avg rows 2 and 2
SELECT FLOOR((4+1)/2),FLOOR((4+2)/2); -- when total_rows is 4, avg rows 2 and 3
Finally, MariaDB 10.3.3+ contains a MEDIAN function
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Asynchronous method call in Python?
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143
You can use the multiprocessing module added in Python 2.6. You can use pools of processes and ...
SQL parser library for Java [closed]
... SQL grammar available. You can use that to create your own parser.
ANTLR4 has a SQL grammar.
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Why use the yield keyword, when I could just use an ordinary IEnumerable?
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241
Using yield makes the collection lazy.
Let's say you just need the first five items. Your way...
How to find if directory exists in Python
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phihagphihag
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What's the fastest way to convert String to Number in JavaScript?
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There are 4 ways to do it as far as I know.
Number(x);
parseInt(x, 10);
parseFloat(x);
+x;
By this quick test I made, it actually depends on browsers.
http://jsperf.com/best-of-string-to-number-conversion/2
Implicit marked the fas...
Maximum length of the textual representation of an IPv6 address?
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45 characters.
You might expect an address to be
0000:0000:0000:0000:0000:0000:0000:0000
8 * 4 + 7 = 39
8 groups of 4 digits with 7 : between them.
But if you have an IPv4-mapped IPv6 address, the last two groups ca...
What's the difference between django OneToOneField and ForeignKey?
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D Malan
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answered May 5 '11 at 1:57
Matthew RankinMatthew ...