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How to smooth a curve in the right way?
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275
I prefer a Savitzky-Golay filter. It uses least squares to regress a small window of your data...
SQlite Getting nearest locations (with latitude and longitude)
...method calculateDerivedPosition(...) calculates those points for you (p1, p2, p3, p4 in picture).
/**
* Calculates the end-point from a given source at a given range (meters)
* and bearing (degrees). This methods uses simple geometry equations to
* calculate the end-point.
*
* @param point
* ...
Static constant string (class member)
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edited Nov 20 '19 at 15:54
answered Oct 14 '09 at 2:03
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Ways to save enums in database
...ame Suit
================== ==========
Shelby Jackson 2
Ian Boyd 1
verses
Name Suit
================== ==========
Shelby Jackson Diamond
Ian Boyd Heart
the latter is much easier. The former required getting at the source code and f...
Facebook database design?
...----------------------------------
1 bob@bob.com bobbie M 1/1/2009 New York City
2 jon@jon.com jonathan M 2/2/2008 Los Angeles
3 joe@joe.com joseph M 1/2/2007 Pittsburgh
Table Friends
---------------
UserID FriendID
----------------
1 2
1 3
2 3
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How to replace multiple white spaces with one white space
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edited Feb 2 '12 at 23:41
Frank van Puffelen
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TaifunPlayer 扩展（Audio Player）：音频播放器扩展，支持流媒体播放控制 ...
... 各版本对比 App上架指南 入门必读 IoT专题 AI2拓展 Aia Store 关于 关于我们 发布日志 服务条款 搜索 ...
MySQL ON vs USING?
...d to just say film_id since that would make for an ambiguity:
ERROR 1052 (23000): Column 'film_id' in field list is ambiguous
As for select *, the joining column appears in the result set twice with ON while it appears only once with USING:
mysql> create table t(i int);insert t select 1;c...
php execute a background process
...Linux machine, I've always handled it like this:
exec(sprintf("%s > %s 2>&1 & echo $! >> %s", $cmd, $outputfile, $pidfile));
This launches the command $cmd, redirects the command output to $outputfile, and writes the process id to $pidfile.
That lets you easily monitor what t...
Adding a Method to an Existing Object Instance
...t "fooFighters"
...
>>> A.fooFighters = fooFighters
>>> a2 = A()
>>> a2.fooFighters
<bound method A.fooFighters of <__main__.A instance at 0x00A9BEB8>>
>>> a2.fooFighters()
fooFighters
Previously defined instances are updated as well (as long as they ...