Recent questions tagged What's

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what's the difference between yield from and yield in python 3.3.2+

After python 3.3.2+ python support a new syntax for create generator function yield from <expression> I ... previous yield statement? Thanks. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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what's the meaning of '=?' in angularJS directive isolate scope declaration?

Does the question mark after equals have special meaning? ie: scope: {foo: '=?'} does the above mean 'do not ... if 'foo' cannot be resolved? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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what's the difference between "hadoop fs" shell commands and "hdfs dfs" shell commands?

Are they supposed to be equal? but, why the "hadoop fs" commands show the hdfs files while the "hdfs dfs" commands ... Apr 22 10:48:26 PDT 2013 See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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what's wrong with hardcoded string in android xml file?

I love to put simple text directly on the xml file without declaring a string first. It is easier, more simple ... a trouble? thanks in advance. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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what's the difference between <% %> and <script language="vbscript" runat="server"> in classic asp?

I couldn't find much documentation on the web so far now, the obvious difference seems to be that you cant mix html ... <% %> tags... right? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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what's the mechanism of sizeof() in C/C++?

It seems sizeof is not a real function? for example, if you write like this: int i=0; printf("%d ", sizeof ... it. Then what does sizeof do? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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what's the right way to do polymorphism with protocol buffers?

I'm trying to long-term serialize a bunch of objects related by a strong class hierarchy in java, and I'd like to ... good as I'm going to get? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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what's an expression and expression statement in c++?

I've read that usually statements in c++ end with a semi-colon; so that might help explain what an expression statement ... ? int x; x = 0; See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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what's the relationship between Selenium RC and WebDriver?

I can see that since selenium 2.0, WebDriver and Selenium RC are packaged together for download. Now I primarily use ... is not, or vice versa? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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what's the easiest way to generate xml in c++?

I've used boost serialization but this doesn't appear to allow me to generate xml that conforms to a ... document back into that class. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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what's a good persistent collections framework for use in java?

By persistent collections I mean collections like those in clojure. For example, I have a list with the elements ... by directly using clojure)? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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