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App Inventor 2 如何下载/保存网络图片？ - App Inventor 2 中文网 - 清泛...
App Inventor 2 如何下载/保存网络图片？ai2_down_webpics首先，需要使用Web客户端组件，需要和网络url进行数据交互的场景就要考虑使用它，Web客户端组件在通信连接抽屉中：设置好网络图片的url，然后执行Get方法即可，代码如下：其...
App Inventor 2 复制屏幕功能，误删组件的“后悔药”，界面设计更便捷 - Ap...
App Inventor 2 复制屏幕功能，误删组件的“后悔药”，界面设计更便捷复制屏幕功能全新上线，中文网独有（MIT没有此功能），可以复制屏幕中的普通组件、图片、附件、拓展、代码块。更多升级详情可查看发布日志。下面演示一...
App Inventor 2 如何比较两个日期/时间？ - App Inventor 2 中文网 - 清泛...
App Inventor 2 如何比较两个日期/时间？利用计时器组件的相关方法：比较两个日期/时间对象的毫秒数，具体请参见文档：https://www.fun123.cn/reference/ ... tml#Clock.GetMillis即时时间的获取方法：1、日期/时间选择...利用计时器组件的相关...
Most efficient way of making an if-elif-elif-else statement when the else is done the most?
...':
the_thing = 1
elif something == 'that':
the_thing = 2
elif something == 'there':
the_thing = 3
else:
the_thing = 4
2.py
something = 'something'
options = {'this': 1, 'that': 2, 'there': 3}
for i in xrange(1000000):
the_thing = options.get(someth...
Overriding id on create in ActiveRecord
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answered Oct 2 '09 at 20:55
Jeff DeanJeff Dean
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Can't install RMagick 2.13.1. Can't find MagickWand.h.
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32 Answers
32
Active
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dynamically add and remove view to viewpager
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278
After figuring out which ViewPager methods are called by ViewPager and which are for other pur...
Dynamically replace the contents of a C# method?
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220
Disclosure: Harmony is a library that was written and is maintained by me, the author of th...
Check number of arguments passed to a Bash script
...nts are valid. It allows a single argument or two.
[[ ($# -eq 1 || ($# -eq 2 && $2 == <glob pattern>)) && $1 =~ <regex pattern> ]]
For pure arithmetic expressions, using (( )) to some may still be better, but they are still possible in [[ ]] with its arithmetic operators...