大约有 47,000 项符合查询结果（耗时：0.0650秒） [XML]
Efficient evaluation of a function at every cell of a NumPy array
...
You could just vectorize the function and then apply it directly to a Numpy array each time you need it:
import numpy as np
def f(x):
return x * x + 3 * x - 2 if x > 0 else x * 5 + 8
f = np.vectorize(f) # or use a different name if you want to keep the...
Why does Python code use len() function instead of a length method?
...tocol in Python is to implement this method on objects which have a length and use the built-in len() function, which calls it for you, similar to the way you would implement __iter__() and use the built-in iter() function (or have the method called behind the scenes for you) on objects which are it...
NAnt or MSBuild, which one to choose and when?
I am aware there are other NAnt and MSBuild related questions on Stack Overflow, but I could not find a direct comparison between the two and so here is the question.
...
findViewByID returns null
First of all: yes, I read all the other threads on this topic. And not only those from this site... (you see, I'm a little frustrated)
...
Should __init__() call the parent class's __init__()?
...cessary, since the super method is empty. Same for __del__.
On the other hand, for __new__, you should indeed call the super method, and use its return as the newly-created object - unless you explicitly want to return something different.
...
Handle file download from ajax post
...or it might be a file (as an attachment). I can easily detect Content-Type and Content-Disposition in my ajax call, but once I detect that the response contains a file, how do I offer the client to download it? I've read a number of similar threads here but none of them provide the answer I'm lookin...
MySQL INSERT INTO table VALUES.. vs INSERT INTO table SET
What is main difference between INSERT INTO table VALUES .. and INSERT INTO table SET ?
3 Answers
...
Manually map column names with class properties
...
Column Attribue would be handy for mapping stored procedure results.
– Ronnie Overby
Nov 2 '12 at 17:48
2
...
When do you use varargs in Java?
...at("This is an integer: %d", myInt);
String.format("This is an integer: %d and a string: %s", myInt, myString);
share
|
improve this answer
|
follow
|
...
When is finally run if you throw an exception from the catch block?
...is the finally block called? Before the throwing of e or is finally called and then catch?
7 Answers
...