大约有 30,000 项符合查询结果（耗时：0.0414秒） [XML]
Is Ruby pass by reference or by value?
...o a value of 'foo'?
str = 'foo'
str.object_id # => 2000
A: A label called str is created that points at the object 'foo', which for the state of this Ruby interpreter happens to be at memory location 2000.
Q2: What happens when you assign the existing variable str to a new object using =?...
How to list all methods for an object in Ruby?
...ationships defined in the User class are not in the results of the methods call.
Added Note that :has_many does not add methods directly. Instead, the ActiveRecord machinery uses the Ruby method_missing and responds_to techniques to handle method calls on the fly. As a result, the methods are not l...
android on Text Change Listener
...ght come across this again someday.
I had a similar problem where I would call setText on a EditText and onTextChanged would be called when I didn't want it to. My first solution was to write some code after calling setText() to undo the damage done by the listener. But that wasn't very elegant.
Af...
ListView inside ScrollView is not scrolling on Android
...roid:nestedScrollingEnabled="true" to its XML declaration or by explicitly calling setNestedScrollingEnabled(true).
If you want to make nested scrolling work on pre-Lollipop devices, which you probably do, you have to use corresponding utility classes from the Support library. First you have to rep...
Preventing Laravel adding multiple records to a pivot table
...$item->id], false);
Update:
Since Laravel 5.3 or 5.2.44, you can also call syncWithoutDetaching:
$cart->items()->syncWithoutDetaching([$item->id]);
Which does exactly the same, but more readable :)
share
...
How to quit android application programmatically
I Found some codes for quit an Android application programatically. By calling any one of the following code in onDestroy() will it quit application entirely?
...
In which case do you use the JPA @JoinTable annotation?
... project_id
name name task_id
The Project_Tasks table is called a "Join Table". To implement this second solution in JPA you need to use the @JoinTable annotation. For example, in order to implement a uni-directional one-to-many association, we can define our entities as such:
Pro...
Switching between Android Navigation Drawer image and Up caret when using fragments
...what is shown) is the most elegant. However I have two changes: 1) I don't call/change the drawer indicator in the onDrawerClosed/onDrawerOpened calls - it is not needed, and 2) I let the Fragments themselves handle the Up navigation by making an AbstractFragment they all inherit which implements on...
How can I use NSError in my iPhone App?
...ean. I usually put these macro's that I use across the whole app in a file called Constants+Macros.h and import this file in the prefix header (.pch file) so it's available everywhere. If you mean you're only using 1 of the 2 macros, that might work. Perhaps the conversion from int to NSString isn't...
Check if event is triggered by a human
... way to do this would be to pass in an additional parameter on the trigger call as per the documentation.
$('.checkbox').change(function(e, isTriggered){
if (!isTriggered)
{
alert ('human');
}
});
$('.checkbox').trigger('change', [true]); //doesn't alert
Example: http://jsfiddle.net/wG...