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如何快速导入拓展？拓展市场可一键导入 - App Inventor 2 中文网 - 清泛IT...
常用的拓展都可以一键导入，可以搜索你想要的拓展。如果没有找到，可以反馈给我们，会持续更新的。
- App Inventor 2 中文网 - 清泛IT社区，为创新赋能！
appinventor是弱语言类型，只有数字（整数、浮点数），没有float类型。
float 的内存表示比较复杂，不建议直接将内存拿来转换。
比较建议的做法，浮点数使用字符串来通信传输（比如传输文本"3.14"），不要用float的原始...
【解决】java.lang.ArrayIndexOutOfBoundsException: length=1; index=-1 a...
...roid.internal.os.ZygoteInit.main(ZygoteInit.java:1091)复制代码原因：没有调用 SetWebView 方法导致的。
Downloading Java JDK on Linux via wget is shown license page instead
... dash" should be "dash following either form of the option" but this is an excellent summarization.
– Alex Dupuy
Mar 18 '14 at 8:27
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In a storyboard, how do I make a custom cell for use with multiple controllers?
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BJ Homer has given an excellent explanation of what is going on.
From a practical standpoint I'd add that, given you can't have cells as xibs AND connect segues, the best one to choose is having the cell as a xib - transitions are far easier to ...
What is the purpose of Android's tag in XML layouts?
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Excellent description.
– RichieHH
Mar 16 '14 at 0:26
4
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Batch script: how to check for admin rights
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+1 Excellent solutions. The SFC solution in particular seems to be a reliable check for all of the operating systems in question. If I come across any issues using either of these I will report them here.
–...
Is there any way to put malicious code into a regular expression?
...in recursion‐depth counter for checking non‐progression.
Russ Cox’s excellent 2007 paper on Regular Expression Matching Can Be Simple And Fast
(but is slow in Java, Perl, PHP, Python, Ruby, ...) talks about ways that most modern NFAs, which all seem to derive from Henry Spencer’s code, suf...
How to do exponential and logarithmic curve fitting in Python? I found only polynomial fitting
...* exp(0.0601 * x) = 4.12 * exp(0.0601 * x)
# (^ not so biased)
Note that Excel, LibreOffice and most scientific calculators typically use the unweighted (biased) formula for the exponential regression / trend lines. If you want your results to be compatible with these platforms, do not include the...
When splitting an empty string in Python, why does split() return an empty list while split('\n') re
...ctly interpret the statements
as "splits a line into fields".
Microsoft Excel's text-to-columns tool made a similar API choice and
incorporates both splitting algorithms in the same tool.
People seem to mentally model field-splitting
as a single concept even though more than one algorithm is invo...