大约有 47,000 项符合查询结果（耗时：0.0454秒） [XML]
How do you extract a column from a multi-dimensional array?
...
234
>>> import numpy as np
>>> A = np.array([[1,2,3,4],[5,6,7,8]])
>>> ...
How do you split a list into evenly sized chunks?
...
1
2
3
Next
3306
...
How do I do base64 encoding on iOS?
..., 'p', 'q', 'r', 's', 't', 'u', 'v',
'w', 'x', 'y', 'z', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '+', '/'
};
@implementation NSString (NSStringAdditions)
+ (NSString *) base64StringFromData: (NSData *)data length: (int)length {
unsigned long ixtext, lentext;
long ctremaining;
uns...
How do I find the duplicates in a list and create another list with them?
...
34 Answers
34
Active
...
How do I compare version numbers in Python?
...
386
Use packaging.version.parse.
>>> from packaging import version
>>> version....
What is the equivalent of MATLAB's repmat in NumPy
...h multiple dimensions and gives a similar result to matlab. (Numpy gives a 3d output array as you would expect - matlab for some reason gives 2d output - but the content is the same).
Matlab:
>> repmat([1;1],[1,1,1])
ans =
1
1
Python:
In [46]: a = np.array([[1],[1]])
In [47]: n...
Bootstrap combining rows (rowspan)
... height:25px;
}
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css" rel="stylesheet" />
<div class="container">
<h1>Responsive Bootstrap</h1>
<div class="row">
<div class="col-lg-5 col-md-5 col-sm-5 col-xs-5" style="back...
Determine device (iPhone, iPod Touch) with iOS
...
31 Answers
31
Active
...
How to iterate for loop in reverse order in swift?
...
233
Xcode 6 beta 4 added two functions to iterate on ranges with a step other than one:
stride(from...