大约有 47,000 项符合查询结果（耗时：0.0462秒） [XML]
How do you do a ‘Pause’ with PowerShell 2.0?
... |
edited Dec 27 '14 at 14:54
Peter Mortensen
26.5k2121 gold badges9292 silver badges122122 bronze badges
...
How do I concatenate or merge arrays in Swift?
...s with +, building a new array
let c = a + b
print(c) // [1.0, 2.0, 3.0, 4.0, 5.0, 6.0]
or append one array to the other with += (or append):
a += b
// Or:
a.append(contentsOf: b) // Swift 3
a.appendContentsOf(b) // Swift 2
a.extend(b) // Swift 1.2
print(a) // [1.0, 2.0, 3.0,...
How to convert a boolean array to an int array
...[ True, False, True], dtype=bool)
>>> x + [1, 2, 3]
array([2, 2, 4])
share
|
improve this answer
|
follow
|
...
Does Ruby regular expression have a not match operator like “!~” in Perl?
...
answered Dec 7 '12 at 8:04
Konrad RudolphKonrad Rudolph
461k118118 gold badges863863 silver badges11101110 bronze badges
...
Column order manipulation using col-lg-push and col-lg-pull in Twitter Bootstrap 3
...
284
This answer is in three parts, see below for the official release (v3 and v4)
I couldn't even f...
Webrick as production server vs. Thin or Unicorn?
...
42
A couple important reasons
it's written in Ruby (see http://github.com/ruby/ruby/tree/trunk/l...
How do you get the magnitude of a vector in Numpy?
...y -- say x.norm() -- but oh well).
import numpy as np
x = np.array([1,2,3,4,5])
np.linalg.norm(x)
You can also feed in an optional ord for the nth order norm you want. Say you wanted the 1-norm:
np.linalg.norm(x,ord=1)
And so on.
...
Python - When to use file vs open
...el this way when the obvious intent of the devs back then was 2 retain open4compat.
– umeboshi
Sep 21 '13 at 17:35
add a comment
|
...
Multiple levels of 'collection.defaultdict' in Python
...
347
Use:
from collections import defaultdict
d = defaultdict(lambda: defaultdict(int))
This will...