大约有 15,000 项符合查询结果(耗时:0.0285秒) [XML]
Using python's eval() vs. ast.literal_eval()?
...tion is called. See also the dangers of eval.
ast.literal_eval raises an exception if the input isn't a valid Python datatype, so the code won't be executed if it's not.
Use ast.literal_eval whenever you need eval. You shouldn't usually evaluate literal Python statements.
...
Generate random numbers following a normal distribution in C/C++
...ethods to generate Gaussian-distributed numbers from a regular RNG.
The Box-Muller transform is commonly used. It correctly produces values with a normal distribution. The math is easy. You generate two (uniform) random numbers, and by applying an formula to them, you get two normally distribute...
Is there any difference between a GUID and a UUID?
...nces. Specifically, some Microsoft GUID docs allow GUIDs to contain any hex digit in any position, while RFC4122 requires certain values for the version and variant fields. Also, [per that same link], GUIDs should be all-upper case, whereas UUIDs should be "output as lower case characters and are ...
Event handling for iOS - how hitTest:withEvent: and pointInside:withEvent: are related?
...nts are very well written, I think ' Event Handling Guide for iOS ' is an exception. It's hard for me to clearly understand what's been described there.
...
differences between 2 JUnit Assert classes
...obviously) and the methods on each appear to be very similar. Can anybody explain why this is?
6 Answers
...
How do I parallelize a simple Python loop?
...around the GIL: There wouldn't be any advantage to using threads for this example anyway. You want to use processes here, not threads, because they avoid a whole bunch of problems.
share
|
improve ...
Excluding directories in os.walk
... tree (using os.walk()) and then visits each file matching a certain file extension. However, since some of the directory trees that my tool will be used on also contain sub directories that in turn contain a LOT of useless (for the purpose of this script) stuff, I figured I'd add an option for th...
How do you switch pages in Xamarin.Forms?
How do you switch between pages in Xamarin Forms?
13 Answers
13
...
Dynamic LINQ OrderBy on IEnumerable / IQueryable
I found an example in the VS2008 Examples for Dynamic LINQ that allows you to use a sql-like string (e.g. OrderBy("Name, Age DESC")) for ordering. Unfortunately, the method included only works on IQueryable<T> . Is there any way to get this functionality on IEnumerable<T> ?
...
Installing Apple's Network Link Conditioner Tool
I have installed xcode 4.3.1 on my machine running Lion.
6 Answers
6
...
