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App Inventor 2 MenuSlide 拓展：滑动菜单效果 · App Inventor 2 中文网
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游戏中的算法与计算思维 01：画布坐标映射到卡片 · App Inventor 2 中文网
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游戏中的算法与计算思维 07：按难度保存最佳成绩 · App Inventor 2 中文网
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Datatype for storing ip address in SQL Server
... IPv4 is binary(4), since that is what it actually is (no, not even an INT32/INT(4), the numeric textual form that we all know and love (255.255.255.255) being just the display conversion of its binary content).
If you do it this way, you will want functions to convert to and from the textual-displ...
How to search for occurrences of more than one space between words in a line
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[ ]{2,}
SPACE (2 or more)
You could also check that before and after those spaces words follow. (not other whitespace like tabs or new lines)
\w[ ]{2,}\w
the same, but you can also pick (capture) only the spaces for tasks...
Converting file size in bytes to human-readable string
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RAM, for instance, is always measured in binary, so to express 1551859712 as ~1.4GiB would be correct.
On the other hand, hard disk manufacturers like to use decimal, so they would call it ~1.6GB.
And just to be confusing, floppy disks use a mixture of the two systems - their 1MB is actually 10...
Using multiple let-as within a if-statement in Swift
...itudeDouble is non-optional in here and importantThing is true
}
Swift 1.2:
Apple may have read your question, because your hoped-for code compiles properly in Swift 1.2 (in beta today):
if let latitudeDouble = latitude as? Double, longitudeDouble = longitude as? Double {
// do stuff here
}
...
Is it possible to ping a server from Javascript?
...lements the above, please comment and I'll add it into the answer.
Update 2: @trante was nice enough to provide a jsFiddle.
http://jsfiddle.net/GSSCD/203/
Update 3: @Jonathon created a GitHub repo with the implementation.
https://github.com/jdfreder/pingjs
Update 4: It looks as if this impleme...
How do you round a number to two decimal places in C#?
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Here's some examples:
decimal a = 1.994444M;
Math.Round(a, 2); //returns 1.99
decimal b = 1.995555M;
Math.Round(b, 2); //returns 2.00
You might also want to look at bankers rounding / round-to-even with the following overload:
Math.Round(a, 2, MidpointRounding.ToEven);
There's...
Find a pair of elements from an array whose sum equals a given number
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edited Sep 12 at 14:53
hjpotter92
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