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Difference between Destroy and Delete
...troy runs any callbacks on the model while delete doesn't.
From the Rails API:
ActiveRecord::Persistence.delete
Deletes the record in the database and freezes this instance to reflect that no changes should be made (since they can't be persisted). Returns the frozen instance.
The row is ...
Python __call__ special method practical example
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Django forms module uses __call__ method nicely to implement a consistent API for form validation. You can write your own validator for a form in Django as a function.
def custom_validator(value):
#your validation logic
Django has some default built-in validators such as email validators, ur...
Reading 64bit Registry from a 32bit application
... AFAIK that's not possible with the Registry class but only when using the API directly.
This might help to get you started.
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Simple Getter/Setter comments
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That's fine - but that requires users of your API to know that, had there been any side effects, they would have been documented !
– oxbow_lakes
Jun 22 '09 at 19:41
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How do sessions work in Express.js with Node.js?
... that could be altered to whatever storage form implements the appropriate API.
So if you want to check things without a specific req request object, like you said, you need to just access that same storage. On the bottom of the first documentation page, it details required methods the storage nee...
Application Skeleton to support multiple screens
... GsmArena
Sameway you can also create folder according to Device's Android API version i.e. drawable-hdpi-v11` so the device which is having API11 and it is Hdpi then it will use this resources.
Additional Tips:
Use relative layouts, dp, sp, and mm
dp units - device independent pixels normalised...
How do I change the android actionbar title and icon
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getActionBar().setHomeButtonEnabled(true) uses API level 14 or up, if you just want back button functionality in older as well as newer APIs you just need getActionBar().setDisplayHomeAsUpEnabled(true)
– Akshat Agarwal
Nov 21 '13 at ...
How to get all properties values of a JavaScript Object (without knowing the keys)?
...n is why Symbol can't be used to make private properties). The new Reflect API from ECMAScript 2015 provides Reflect.ownKeys, which returns a list of property names (including non-enumerable ones) and symbols.
Array comprehensions (do not attempt to use)
Array comprehensions were removed from ECMA...
When do I need to use AtomicBoolean in Java?
...f threads are
running through your code that uses
these atomic concurrency API, they
will scale much better than code
which uses Object level
monitors/synchronization. Since,
Java's synchronization mechanisms
makes code wait, when there are lots
of threads running through your
critical sections, a s...
What is the difference between CascadeType.REMOVE and orphanRemoval in JPA?
...vious orders and replace them with the one provided. (PUT in terms of REST API)
@OneToMany(mappedBy="customer", orphanRemoval="true")
public List<Order> getOrders() { ... }
Without orphanRemoval old orders would be kept. (PATCH in terms of REST API)
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