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App Inventor 2 Personal Image Classifier (PIC) 拓展：自行训练AI图像识...
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App Inventor 2 Personal Image Classifier (PIC) 拓展：自行训练AI图像识别模型，开发图像识别分类App
PersonalImageClassifier (PIC) 拓展
图像分类App原理介绍
开发...
App Inventor 2 代码调试方式：App调试、问题排查方法 · App Inventor 2 中文网
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App Inventor 2 代码调试方式：App调试...
How to count total lines changed by a specific author in a Git repository?
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Email Address Validation in Android on EditText [duplicate]
...erns.EMAIL_ADDRESS.matcher(this).matches()
Edit: It will work On Android 2.2+ onwards !!
Edit: Added missing ;
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How can I use numpy.correlate to do autocorrelation?
... result = numpy.correlate(x, x, mode='full')
return result[result.size/2:]
You will, of course, need error checking to make sure that x is actually a 1-d array. Also, this explanation probably isn't the most mathematically rigorous. I've been throwing around infinities because the definition o...
How to convert a unix timestamp (seconds since epoch) to Ruby DateTime?
...must be converted to a string:
require 'date'
DateTime.strptime("1318996912",'%s')
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What are “named tuples” in Python?
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Named tuples are basically easy-to-create, lightweight object types. Named tuple instances ca...
Get the week start date and week end date from week number
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You can find the day of week and do a date add on days to get the start and end dates..
DATEADD...
Find region from within an EC2 instance
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Test if a vector contains a given element
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Both the match() (returns the first appearance) and %in% (returns a Boolean) functions are desi...