大约有 46,000 项符合查询结果（耗时：0.0473秒） [XML]
How to validate an email address in PHP
...
10 Answers
10
Active
...
From ND to 1D arrays
...c = a.flatten()
If you just want an iterator, use np.ndarray.flat:
In [20]: d = a.flat
In [21]: d
Out[21]: <numpy.flatiter object at 0x8ec2068>
In [22]: list(d)
Out[22]: [1, 2, 3, 4, 5, 6]
share
|
...
Site stopped working in asp.net System.Web.WebPages.Razor.Configuration.HostSection cannot be cast t
...
200
In the root Web.config make sure assemblyBinding contains the proper version for the assembly "...
Regex for string not ending with given suffix
...
tckmntckmn
50k2121 gold badges9595 silver badges140140 bronze badges
...
Numpy first occurrence of value greater than existing value
...
207
This is a little faster (and looks nicer)
np.argmax(aa>5)
Since argmax will stop at the f...
How do I give text or an image a transparent background using CSS?
...
30 Answers
30
Active
...
Index all *except* one item in python
.... For example, to make b a copy of a without the 3rd element:
a = range(10)[::-1] # [9, 8, 7, 6, 5, 4, 3, 2, 1, 0]
b = [x for i,x in enumerate(a) if i!=3] # [9, 8, 7, 5, 4, 3, 2, 1, 0]
This is very general, and can be used with all iterables, including numpy arrays. If y...
In C++, is it still bad practice to return a vector from a function?
...arrays—in many programming languages. Is this style now acceptable in C++0x if the class has a move constructor, or do C++ programmers consider it weird/ugly/abomination?
...
Two-dimensional array in Swift
...Int]] = []
OR if you need an array of predefined size (as mentioned by @0x7fffffff in comments):
// 2 dimensional array of arrays of Ints set to 0. Arrays size is 10x5
var arr = Array(count: 3, repeatedValue: Array(count: 2, repeatedValue: 0))
// ...and for Swift 3+:
var arr = Array(repeating: ...