大约有 30,000 项符合查询结果（耗时：0.0414秒） [XML]
java: (String[])List.toArray() gives ClassCastException
...|
edited Apr 16 '11 at 23:32
answered Apr 16 '11 at 23:26
M...
Many-to-many relationship with the same model in rails?
... |
edited Feb 1 '13 at 15:32
JJD
42.7k4545 gold badges177177 silver badges291291 bronze badges
answered ...
surface plots in matplotlib
...a surface.
Here's a smooth surface example:
import numpy as np
from mpl_toolkits.mplot3d import Axes3D
# Axes3D import has side effects, it enables using projection='3d' in add_subplot
import matplotlib.pyplot as plt
import random
def fun(x, y):
return x**2 + y
fig = plt.figure()
ax = fi...
Convert DateTime to String PHP
... |
edited Oct 23 '18 at 9:32
Barry
3,08377 gold badges1919 silver badges4040 bronze badges
answered Dec ...
Set attributes from dictionary in python
...y])
Then you can call it like this:
e = Employee({"name": "abc", "age": 32})
or like this:
e = Employee(name="abc", age=32)
or even like this:
employee_template = {"role": "minion"}
e = Employee(employee_template, name="abc", age=32)
...
Why am I getting a “401 Unauthorized” error in Maven?
...ver>
<id>nexus-snapshots</id>
<username>MY_SONATYPE_DOT_COM_USERNAME</username>
<password>MY_SONATYPE_DOT_COM_PASSWORD</password>
</server>
you probably need to get the username / password from sonatype dot com.
...
Is the “struct hack” technically undefined behavior?
...ot strictly conforming
http://www.open-std.org/jtc1/sc22/wg14/www/docs/dr_051.html
In the C99 Rationale document the C Committee adds:
The validity of this construct has always been questionable. In the response to one Defect
Report, the Committee decided that it was undefined behavior bec...
How to get a complete list of object's methods and attributes?
...
– Bartosz Radaczyński
Oct 10 '08 at 12:32
2
inspect is meant to be "at least as" trustworthy as dir(...
Java: is there a map function?
...;
}
});
System.out.println(output);
Output:
[a, 14, 1e, 28, 32]
These days, with Java 8, there is actually a map function, so I'd probably write the code in a more concise way:
Collection<String> hex = input.stream()
.map(Integer::toHexString)
...
Extract subset of key-value pairs from Python dictionary object?
...
A bit shorter, at least:
wanted_keys = ['l', 'm', 'n'] # The keys you want
dict((k, bigdict[k]) for k in wanted_keys if k in bigdict)
share
|
improve thi...