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乐高机器人®组件 · App Inventor 2 中文网
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GetDistance 获取距离()
返回当前距离（厘米），值为0到254之间，如果无法读取距离则返回-1。
Nxt颜色传感器
一个为乐高MINDSTORMS NXT机器人上的颜色传感器提供高级接口的组件。
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Is a statically-typed full Lisp variant possible?
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answered Jul 24 '10 at 17:51
Eli BarzilayEli Barzilay
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Passing an integer by reference in Python
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It doesn't quite work that way in Python. Python passes references to objects. Inside your func...
warning about too many open figures
...ix, ax = plt.subplots(...) , I get the warning RuntimeWarning: More than 20 figures have been opened. Figures created through the pyplot interface (matplotlib.pyplot.figure) are retained until explicitly closed and may consume too much memory.
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How to copy a file to a remote server in Python using SCP or SSH?
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edited Dec 30 '19 at 2:12
Boris
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.rar, .zip files MIME Type
.../ get the first 7 bytes
$bytes = file_get_contents($file, FALSE, NULL, 0, 7);
$ext = strtolower(substr($file, - 4));
// RAR magic number: Rar!\x1A\x07\x00
// http://en.wikipedia.org/wiki/RAR
if ($ext == '.rar' and bin2hex($bytes) == '526172211a0700') {
return TRUE;
}...
Rebuild or regenerate 'ic_launcher.png' from images in Android Studio
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For Android Studio 0.4.0 and later, click "File > New > Image Asset".
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npm - how to show the latest version of a package
...ule? I am expecting something like npm --latest express to print out v3.0.0 .
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Press alt + numeric in bash and you get (arg [numeric]) what is that?
...and then the command. For example, to give the C-d command an argument of 10, you could type 'M-1 0 C-d', which will delete the next ten characters on the input line.
For that to work, you have to know where the Meta key is mapped: sometimes it's Alt, sometimes it's Esc, cool computers have a dedic...
How can I select the first day of a month in SQL?
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30 Answers
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