大约有 10,700 项符合查询结果（耗时：0.0388秒） [XML]
Is it possible to make a type only movable and not copyable?
...
Preface: This answer was written before opt-in built-in traits—specifically the Copy aspects—were implemented. I've used block quotes to indicate the sections that only applied to the old scheme (the one that applied when the question was asked).
Old: To answer the basic question, you c...
Shell equality operators (=, ==, -eq)
Can someone please explain the difference between = , == and -eq in shell scripting?
4 Answers
...
Why can't I use Docker CMD multiple times to run multiple services?
...st like EXPOSE, but contrary to e.g. RUN and ADD. By this, I mean that you can override it later, in an extending Dockerfile, or simple in your run command, which is what you are experiencing. At all times, there can be only one CMD.
If you want to run multiple services, I indeed would use supervis...
What is the difference between Raising Exceptions vs Throwing Exceptions in Ruby?
Ruby has two different exceptions mechanisms: Throw/Catch and Raise/Rescue.
3 Answers
...
Scala: List[Future] to Future[List] disregarding failed futures
...re that none of the futures has failed. .recover is your friend here, you can combine it with map to convert all the Future[T] results to Future[Try[T]]] instances, all of which are certain to be successful futures.
note: You can use Option or Either as well here, but Try is the cleanest way if yo...
What are the mechanics of short string optimization in libc++?
...ever, I would like to know in more detail how it works in practice, specifically in the libc++ implementation:
2 Answers
...
Easiest way to rename a model using Django/South?
...(self, orm):
db.rename_table('yourapp_bar','yourapp_foo')
You can accomplish this more simply using the db_table Meta option in your model class. But every time you do that, you increase the legacy weight of your codebase -- having class names differ from table names makes your code ha...
Removing projects in Sublime Text 2 and 3
...ted from the recent projects list. Unfortunately, it does not and the list can become littered with projects that no longer exist.
Until Sublime Text offers this feature there are a couple of manual ways you can remove projects.
Option 1: The quick way (Clear All):
If you're just looking for the ...
Git: what is a dangling commit/blob and where do they come from?
...ory, you may end up backing out of operations, and making other moves that cause intermediary blobs, and even some things that git does for you to help avoid loss of information.
Eventually (conditionally, according to the git gc man page) it will perform garbage collection and clean these things u...
What is the difference between javac and the Eclipse compiler?
...
Eclipse has implemented its own compiler called as Eclipse Compiler for Java (ECJ).
It is different from the javac, the compiler that is shipped with Sun JDK. One notable difference is that the Eclipse compiler lets you run code that didn't actually properly compil...