大约有 40,000 项符合查询结果(耗时:0.0283秒) [XML]

https://stackoverflow.com/ques... 

Importing from builtin library when module with same name exists

Situation: - There is a module in my project_folder called calendar - I would like to use the built-in Calendar class from the Python libraries - When I use from calendar import Calendar it complains because it's trying to load from my module. ...
https://stackoverflow.com/ques... 

Objective-C ARC: strong vs retain and weak vs assign

... @Pascal: weak references aren't allowed in deployment targets where the os is not 5.0 or higher. So for older projects you can still use assign, but if you move to newer versions you have to switch to weak – Mattia Feb...
https://stackoverflow.com/ques... 

Is it safe to remove selected keys from map within a range loop?

...stom type that implements the func (a T) expired() bool interface. For purposes of this example, you could try: m := make(map[int]int) /* populate m here somehow */ for key := range (m) { if key % 2 == 0 { /* this is just some condition, such as calling expired */ delete(m, key); } } ...
https://stackoverflow.com/ques... 

What is the difference between exit and return? [duplicate]

...hat is difference between return and exit statement in C programming when called from anywhere in a C program? 4 Answers ...
https://stackoverflow.com/ques... 

How to manually expand a special variable (ex: ~ tilde) in bash

... Using eval is a horrible suggestion, it's really bad that it gets so many upvotes. You will run into all sorts of problems when the variable's value contains shell meta characters. – user2719058 Aug 31 '14 at 19:47 ...
https://stackoverflow.com/ques... 

Stop pip from failing on single package when installing with requirements.txt

I am installing packages from requirements.txt 6 Answers 6 ...
https://stackoverflow.com/ques... 

NSNotificationCenter addObserver in Swift

...) NSNotificationCenter.defaultCenter().removeObserver(self) // Remove from all notifications being observed Method handler for received Notification func methodOfReceivedNotification(notification: NSNotification) { // Take Action on Notification } Annotate either the class or the target metho...
https://stackoverflow.com/ques... 

When to use enumerateObjectsUsingBlock vs. for

... Ultimately, use whichever pattern you want to use and comes more naturally in the context. While for(... in ...) is quite convenient and syntactically brief, enumerateObjectsUsingBlock: has a number of features that may or may not prove interesting: enumerateObjectsUsingBlock: will be as fas...
https://stackoverflow.com/ques... 

How can I check the extension of a file?

... os.path provides many functions for manipulating paths/filenames. (docs) os.path.splitext takes a path and splits the file extension from the end of it. import os filepaths = ["/folder/soundfile.mp3", "folder1/folder/sound...
https://stackoverflow.com/ques... 

PowerShell script to return versions of .NET Framework on a machine?

...t). It also outputs both Client and Full on 4.0 (if you have them both installed): Get-ChildItem 'HKLM:\SOFTWARE\Microsoft\NET Framework Setup\NDP' -recurse | Get-ItemProperty -name Version,Release -EA 0 | Where { $_.PSChildName -match '^(?!S)\p{L}'} | Select PSChildName, Version, Release Based o...