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Create Directory When Writing To File In Node.js
... @chrismarx imagine the following path: "/home/documents/a/b/c/myfile.txt". "/home/documents" exists, while everything in front of it doesn't. When "ensureDirectoryExistence" is called for the 1st time, dirname is "/home/documents/a/b/c". I can't call fs.mkdirSync(dirname) right now because "/h...
LEGO EV3 机器人传感器面板 · App Inventor 2 中文网
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LEGO EV3 机器人传感器面板
项目概述
下载
示例项目文件：
EV3 传感器介绍
硬件要求
传感器连接
App Inventor 组件设置
设计器界面
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【转】用App Inventor 2实现电子围栏功能 - App应用开发 - 清泛IT社区，为创新赋能！
...，经度在后。在逻辑设计中，如果需要对地图进行平衡，推荐使用数值型的坐标而非转换成字符串的坐标。EnablePan允许平移地图Enables or disables the ability of the user to move the Map.EnableRotation允许旋转地图Enables or disables the two-finger rotat...
Base64Util 拓展：支持图像框、画布、文件、文本字符串、图像精灵base64编...
...码
Base64Util 扩展
下载链接
致谢
注意事项
图像框有关
画布有关
文件有关
文本字符串有关
图像精灵有关
其他可视组件有关
函数
使用示例 ...
Convert .pem to .crt and .key
...bit of data to encrypt:
Example file :
echo 'too many secrets' > file.txt
You now have some data in file.txt, lets encrypt it using OpenSSL and
the public key:
openssl rsautl -encrypt -inkey public.pem -pubin -in file.txt -out file.ssl
This creates an encrypted version of file.txt calling it...
How to split a large text file into smaller files with equal number of lines?
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How about the split command?
split -l 200000 mybigfile.txt
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Activate a virtualenv via fabric as deploy user
...deploy():
with virtualenv():
run("pip freeze > requirements.txt")
Or deploy your fab file and run this locally. This setup lets you activate the virtualenv for local or remote commands. This approach is powerful because it works around local's inability to run .bashrc using bash -l:
...
What use is find_package() if you need to specify CMAKE_MODULE_PATH anyway?
...;.cmake file located within your project. Something like this:
CMakeLists.txt
cmake/FindFoo.cmake
cmake/FindBoo.cmake
CMakeLists.txt content:
list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_LIST_DIR}/cmake")
find_package(Foo REQUIRED) # FOO_INCLUDE_DIR, FOO_LIBRARIES
find_package(Boo REQUIRED) # ...
App Inventor 2 试验组件 · App Inventor 2 中文网
...)，编译为apk则不受限制安装后可正常运行。
demo程序下载：
chatgpt.aia
属性
ApiKey
ChatGPT 的 ApiKey，由用户提供。如果提供，我们将使用它来代替聊天代理服务中的 API 密钥。
注意：我们不将其作为属性在“界面设计”...
How do I use Ruby for shell scripting?
...ding current dir.
#=> array of relative names
File.expand_path('~/file.txt') #=> "/User/mat/file.txt"
File.dirname('dir/file.txt') #=> 'dir'
File.basename('dir/file.txt') #=> 'file.txt'
File.join('a', 'bunch', 'of', 'strings') #=> 'a/bunch/of/strings'
__FILE__ #=> the name of the...