大约有 21,000 项符合查询结果（耗时：0.0275秒） [XML]
angularJS: How to call child scope function in parent scope
...
You can use $broadcast from the parent to a child:
function ParentCntl($scope) {
$scope.msg = "";
$scope.get = function(){
$scope.$broadcast ('someEvent');
return $scope.msg;
}
}
function ChildCntl($sc...
Storyboard - refer to ViewController in AppDelegate
consider the following scenario: I have a storyboard-based app. I add a ViewController object to the storyboard, add the class files for this ViewController into the project and specify the name of the new class in the IB identity inspector. Now how am I going to refer to this ViewController program...
How can I use a local image as the base image with a dockerfile?
...
jpetazzojpetazzo
12.2k22 gold badges3737 silver badges4343 bronze badges
5
...
Rails: Default sort order for a rails model?
...pe { order(created_at: :desc) }
end
For Rails 2.3, 3, you need this instead:
default_scope order('created_at DESC')
For Rails 2.x:
default_scope :order => 'created_at DESC'
Where created_at is the field you want the default sorting to be done on.
Note: ASC is the code to use for Ascend...
Why no love for SQL? [closed]
... wouldn't have to care about performance. So you end up in writing SQL - reading execution plans - rephrasing SQL trying to influence the execution plan, and you wonder why you can't write the execution plan yourself.
Another problem of the declarative language is that some problems are easier to s...
Enterprise app deployment doesn't work on iOS 7.1
...his has always worked fine, but after installing the iOS 7.1 beta on our iPad it refuses to install. Instead we just get the generic Cannot connect to example.com message that iOS unhelpfully displays when there is any sort of problem downloading the app.
...
Is it better in C++ to pass by value or pass by constant reference?
...ntics. The reason is simple: if you passed by value, a copy of the object had to be made and, except for very small objects, this is always more expensive than passing a reference.
With C++11, we have gained move semantics. In a nutshell, move semantics permit that, in some cases, an object can be ...
Using custom std::set comparator
...e default order of the items in a set of integers to be lexicographic instead of numeric, and I can't get the following to compile with g++:
...
How can I use redis with Django?
...
This Python module for Redis has a clear usage example in the readme: http://github.com/andymccurdy/redis-py
Redis is designed to be a RAM cache. It supports basic GET and SET of keys plus the storing of collections such as dictionaries. You can cache RDBMS queries by storing their outp...
Why doesn't Dijkstra's algorithm work for negative weight edges?
...a of it is: If we have a vertex in open such that its cost is minimal - by adding any positive number to any vertex - the minimality will never change.
Without the constraint on positive numbers - the above assumption is not true.
Since we do "know" each vertex which was "closed" is minimal - we ca...