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App Inventor 2 扩展 · App Inventor 2 中文网
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Initial Release 1.0 (Introduced as part of MIT App Inventor Release nb149)
DRAFT: September 27, 2015
Updated: June 9, 2017
Updated: May 17, 2021
sample extensions are at: MIT App Inventor Extension
source code for sample extensions at: http://appinventor.mit.edu/extensions
Appinventor hel...
No increment operator (++) in Ruby? [duplicate]
Why is there no increment operator in Ruby?
3 Answers
3
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What is a good Hash Function?
What is a good Hash function? I saw a lot of hash function and applications in my data structures courses in college, but I mostly got that it's pretty hard to make a good hash function. As a rule of thumb to avoid collisions my professor said that:
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In C++, if throw is an expression, what is its type?
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According to the standard, 5.16 paragraph 2 first point, "The second or the third operand (but not both) is a throw-expression (15.1); the result is of the type of the other and is an rvalue." Therefore, the conditional operator doe...
How do I exchange keys with values in a dictionary?
...tionary as input, and would like to to return a dictionary whose keys will be the input's values and whose value will be the corresponding input keys. Values are unique.
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String representation of an Enum
I have the following enumeration:
37 Answers
37
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What is a “slug” in Django?
When I read Django code I often see in models what is called a "slug". I am not quite sure what this is, but I do know it has something to do with URLs. How and when is this slug-thing supposed to be used?
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Best way to do nested case statement logic in SQL Server
I'm writing an SQL Query, where a few of the columns returned need to be calculated depending on quite a lot of conditions.
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UITextView style is being reset after setting text property
... UITextView *_masterText and after call method setText property font is being reset.
It's happening after I change sdk 7.
_masterText is IBOutlet , global and properties are set in storyboard. It's only me or this is general SDK bug?
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jQuery Mobile: document ready vs. page events
I am using jQuery Mobile, and I am having trouble understanding differences between classic document ready and jQuery Mobile page events.
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