大约有 47,000 项符合查询结果（耗时：0.0364秒） [XML]
Mathematical functions in Swift
...t Foundation.
import Foundation
If you want everything and also classes for user interface, it depends if your playground is for OS X or iOS.
For OS X, you need import Cocoa.
import Cocoa
For iOS, you need import UIKit.
import UIKit
You can easily discover your playground platform by openi...
How to crop circular area from bitmap in Android
...raw the clipped bitmap into a buffer that has been erased to transparent beforehand. I think either would be a bit faster and simpler than this.
– Gene
Dec 1 '12 at 0:36
1
...
Finding quaternion representing the rotation from one vector to another
....w = sqrt((v1.Length ^ 2) * (v2.Length ^ 2)) + dotproduct(v1, v2);
Don't forget to normalize q.
Richard is right about there not being a unique rotation, but the above should give the "shortest arc," which is probably what you need.
...
Why is printing to stdout so slow? Can it be sped up?
...nd was quite surprised to find that almost all the time spent is waiting for the terminal to process the results.
6 Answe...
ViewPager and fragments — what's the right way to store fragment's state?
Fragments seem to be very nice for separation of UI logic into some modules. But along with ViewPager its lifecycle is still misty to me. So Guru thoughts are badly needed!
...
How to remove non-alphanumeric characters?
...
For unicode characters, it is :
preg_replace("/[^[:alnum:][:space:]]/u", '', $string);
share
|
improve this answer
...
Why doesn't requests.get() return? What is the default timeout that requests.get() uses?
... Anyone know where this shows up in the docs?
– wordsforthewise
Oct 21 '17 at 22:31
1
@wordsforth...
Substitute multiple whitespace with single whitespace in Python [duplicate]
...d rather avoid REs) is
' '.join(mystring.split())
The split and join perform the task you're explicitly asking about -- plus, they also do the extra one that you don't talk about but is seen in your example, removing trailing spaces;-).
...
How to run a python script from IDLE interactive shell?
.../app/filename.py').read())
See https://stackoverflow.com/a/437857/739577 for passing global/local variables.
In deprecated Python versions
Python2
Built-in function: execfile
execfile('helloworld.py')
It normally cannot be called with arguments. But here's a workaround:
import sys
sys.argv...
Objective-C and Swift URL encoding
...aracterSet characterSetWithCharactersInString:@"/+=\n"] invertedSet];
For Swift 3.0:
var escapedString = originalString.addingPercentEncoding(withAllowedCharacters:.urlHostAllowed)
For Swift 2.x:
var escapedString = originalString.stringByAddingPercentEncodingWithAllowedCharacters(NSCh...