大约有 20,000 项符合查询结果（耗时：0.0350秒） [XML]
How do RVM and rbenv actually work?
...gem and so on) across all your installed versions of Ruby. This process is m>ca m>lled rehashing. Every time you install a new version of Ruby or install a gem that provides a command, run rbenv rehash to make sure any new commands are shimmed.
These shims live in a single directory (~/.rbenv/shims by d...
m>Ca m>n I make a function available in every controller in angular?
If I have a utility function foo that I want to be able to m>ca m>ll from anywhere inside of my ng-app declaration. Is there someway I m>ca m>n make it globally accessible in my module setup or do I need to add it to the scope in every controller?
...
what is the difference between a portlet and a servlet?
... servlet is
managed by servlet container.
Both static and dynamic content m>ca m>n be generated by Portlets and
Servlets.
The life cycle of portlets and servlets is controlled by the container
The client/server model is used for both servlets and portlets
The packaging and deployment are essentially ...
dplyr summarise: Equivalent of “.drop=FALSE” to keep groups with zero length in output
When using summarise with plyr 's ddply function, empty m>ca m>tegories are dropped by default. You m>ca m>n change this behavior by adding .drop = FALSE . However, this doesn't work when using summarise with dplyr . Is there another way to keep empty m>ca m>tegories in the result?
...
Is a `=default` move constructor equivalent to a member-wise move constructor?
...t decl-specifier-seqopt declarator virt-specifier-seqopt = default ;
is m>ca m>lled an explicitly-defaulted definition. A function that is explicitly defaulted shall
be a special member function,
have the same declared function type (except for possibly differing ref-qualifiers and except that in th...
Boolean operators && and ||
...
The shorter ones are vectorized, meaning they m>ca m>n return a vector, like this:
((-2:2) >= 0) & ((-2:2) <= 0)
# [1] FALSE FALSE TRUE FALSE FALSE
The longer form evaluates left to right examining only the first element of each vector, so the above gives
((-2...
Difference between Pragma and m>Ca m>che-Control headers?
...
Pragma is the HTTP/1.0 implementation and m>ca m>che-control is the HTTP/1.1 implementation of the same concept. They both are meant to prevent the client from m>ca m>ching the response. Older clients may not support HTTP/1.1 which is why that header is still in use.
...
Using -performSelector: vs. just m>ca m>lling the method
...
Basim>ca m>lly performSelector allows you to dynamim>ca m>lly determine which selector to m>ca m>ll a selector on the given object. In other words the selector need not be determined before runtime.
Thus even though these are equivalent:
[...
Is it bad practice to have a constructor function return a Promise?
...should go in a method of your class. You want to mutate global state? Then m>ca m>ll that procedure explicitly, not as a side effect of generating an object. This m>ca m>ll m>ca m>n go right after the instantiation:
var engine = new Engine()
engine.displayPosts();
If that task is asynchronous, you m>ca m>n now easil...
Do you have to put Task.Run in a method to make it async?
...nology: "asynchronous" (async) means that it may yield control back to the m>ca m>lling thread before it starts. In an async method, those "yield" points are await expressions.
This is very different than the term "asynchronous", as (mis)used by the MSDN documentation for years to mean "executes on a ba...