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App Inventor 2 CustomWebView 拓展：高级版Web浏览器，完美浏览现代Web前...
...换 目录 在线 客服 扫码添加客服咨询 我要 分享 扫码分享到朋友圈 顶部 var qrcode = new QRCode("qrcode", { text: window.location.href + "?f=share", ...
How can I use map and receive an index as well in Scala?
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I believe you're looking for zipWithIndex?
scala> val ls = List("Mary", "had", "a", "little", "lamb")
scala> ls.zipWithIndex.foreach{ case (e, i) => println(i+" "+e) }
0 Mary
1 had
2 a
3 little
4 lamb
From: http://www.artima.com/forums/flat.j...
Calculate difference in keys contained in two Python dictionaries
...:\Dokumente und Einstellungen\thc>python -m timeit -s "dictA =
dict(zip(range(1000),range
(1000))); dictB = dict(zip(range(0,2000,2),range(1000)))" "diff=set(dictB)-set(dictA)"
10000 loops, best of 3: 107 usec per loop
diff = [ k for k in dictB if k not in dictA ] #lc
C:\Dokumente und Einst...
Get: TypeError: 'dict_values' object does not support indexing when using python 3.2.3 [duplicate]
... (slower, uglier). The correct way is as per @DavidRobinson's answer: dict(zip(names, d.values())). Of course this code also relies on values being sorted as names which is by no means guaranteed.
– Mr_and_Mrs_D
May 24 '17 at 17:49
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Can't install PIL after Mac OS X 10.9
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If you also want to have a PIL/Pillow with zlib/png/zip support you also need to do: ln -s /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk/usr/include/zlib.h /usr/local/include/
– gromgull
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SSL Error When installing rubygems, Unable to pull data from 'https://rubygems.org/
...ou gave. You might want to install rubygems from a gem file instead of the zip files he mentions. I haven't found a command to install from an unpacked gem or zip file. Gem here - rubygems.org/pages/download. The command is - gem install --local C:\Downloads\rubygems-update-2.4.5.gem
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convert_tz returns null
...QL service by searching for "services" in Windows Start button.
5) Then unzip the timezone_2017c_posix.zip and then copy the files in it (copy the files directly, don't copy the whole folder itself), and paste in
C:\ProgramData\MySQL\MySQLServer5.x\Data\mysql\
6) For MySQL 5.7, timezone_2017c_pos...
How do you rotate a two dimensional array?
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TL;DR: list(zip(*reversed(your_list_of_lists)))
– Boris
Dec 28 '19 at 7:34
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传感器组件 · App Inventor 2 中文网
... 属性
事件
方法
条码扫描器
属性
事件
方法
气压传感器
属性
事件
方法
计时器
属...
How to create a video from images with FFmpeg?
...M4
These are the test media I've used:a
wget -O opengl-rotating-triangle.zip https://github.com/cirosantilli/media/blob/master/opengl-rotating-triangle.zip?raw=true
unzip opengl-rotating-triangle.zip
cd opengl-rotating-triangle
wget -O audio.ogg https://upload.wikimedia.org/wikipedia/commons/7/74/...