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手机蓝牙控制台灯：HC-05 开关、无级调光、定时关灯（附 .aia 源码与单片机...
...机 → 台灯
L:60\n
亮度设为 60%（0 = 关灯，范围 0~100）
台灯 → 手机
OK:60\r\n
已执行，当前亮度 60%
开关灯不用单独指令：关灯发 L:0，开灯发上次的亮度。
硬件与单片机程序
...
Understanding MongoDB BSON Document size limit
...on to 8MB or 16MB ... but I think to put this into perspective, Eliot from 10gen (who developed MongoDB) puts it best:
EDIT: The size has been officially 'raised' to 16MB
So, on your blog example, 4MB is
actually a whole lot.. For example,
the full uncompresses text of "War of
the Worlds"...
cancelling a handler.postdelayed process
...
answered Dec 7 '10 at 15:52
VarunVarun
31.2k44 gold badges4646 silver badges4242 bronze badges
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MAMP Pro 3.05 on Mavericks updated to Yosemite - Apache does not start
...
MAMP Folks just posted the workaround
Workaround for the 10.10 Preview 5 bug: Rename the file “envvars” located in /Applications/MAMP/Library/bin into “_envvars”
Test Update: It works!
Works for Yosemite release too!
...
SQlite Getting nearest locations (with latitude and longitude)
... double range, double bearing)
{
double EarthRadius = 6371000; // m
double latA = Math.toRadians(point.x);
double lonA = Math.toRadians(point.y);
double angularDistance = range / EarthRadius;
double trueCourse = Math.toRadians(bearing);
dou...
When is assembly faster than C?
...nce of fixed point divides is even bigger. I had improvements up to factor 10 for division heavy fixed point code by writing a couple of asm-lines.
Using Visual C++ 2013 gives the same assembly code for both ways.
gcc4.1 from 2007 also optimizes the pure C version nicely. (The Godbolt compiler ...
What's the deal with a leading underscore in PHP class methods?
...m outside the class.
– Luc M
Apr 8 '10 at 19:11
Underscores make even less sense if an extending class decides to make...
How do I partially update an object in MongoDB so the new object will overlay / merge with the exist
...
107
If I understand the question correctly, you want to update a document with the contents of ano...
Unit testing that events are raised in C# (in order)
...
David Hall
30.2k1010 gold badges8484 silver badges119119 bronze badges
answered Oct 30 '08 at 1:45
Andrew StapletonAn...
How can I use UUIDs in SQLAlchemy?
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answered Mar 21 '18 at 4:10
JDiMatteoJDiMatteo
8,03133 gold badges3939 silver badges5454 bronze badges
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