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App Inventor 2 项目合并工具
本文档最初由米尔斯学院（Mills College）的 Kate Feeney 为 AI Classic 编写。该计...
Why would a post-build step (xcopy) occasionally exit with code 2 in a TeamCity build?
...ying is a file or a directory. This error will appear as "exited with code 2". When you run the same xcopy at a command prompt, you'll see that xcopy is asking for a response of file or directory.
To resolve this issue with an automated build, you can echo in a pre-defined response with a pipe.
To...
How to dynamically compose an OR query filter in Django?
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162
You could chain your queries as follows:
values = [1,2,3]
# Turn list of values into list of Q...
List comprehension vs map
...n map needs a lambda:
$ python -mtimeit -s'xs=range(10)' 'map(lambda x: x+2, xs)'
100000 loops, best of 3: 4.24 usec per loop
$ python -mtimeit -s'xs=range(10)' '[x+2 for x in xs]'
100000 loops, best of 3: 2.32 usec per loop
...
Twitter Bootstrap CSS affecting Google Maps
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With Bootstrap 2.0, this seemed to do the trick:
#mapCanvas img {
max-width: none;
}
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Is there a way to pass optional parameters to a function?
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The Python 2 documentation, 7.6. Function definitions gives you a couple of ways to detect whether a caller supplied an optional parameter.
First, you can use special formal parameter syntax *. If the function definition has a formal p...
Benchmarking (python vs. c++ using BLAS) and (numpy)
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jfsjfs
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Pointers in C: when to use the ampersand and the asterisk?
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622
You have pointers and values:
int* p; // variable p is pointer to integer type
int i; // integ...
How can I round a number in JavaScript? .toFixed() returns a string?
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127
It returns a string because 0.1, and powers thereof (which are used to display decimal fraction...
Android Fragment lifecycle over orientation changes
Using the compatibility package to target 2.2 using Fragments.
7 Answers
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