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Android SQLite DB When to Close
...l prevent multiple manipulations to the database and save your application from a potential crash
so in your singleton, you might have a method like this to get your single SQLiteOpenHelper object:
private SQLiteDatabase db;
private MyDBOpenHelper mySingletonHelperField;
public MyDBOpenHelper getD...
127 Return code from $?
What is the meaning of return value 127 from $? in UNIX.
8 Answers
8
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When saving, how can you check if a field has changed?
...
I use following mixin:
from django.forms.models import model_to_dict
class ModelDiffMixin(object):
"""
A model mixin that tracks model fields' values and provide some useful api
to know what fields have been changed.
"""
def ...
What is the meaning of the term arena in relation to memory?
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@AndreasHaferburg: The memory allocator from the standard library automatically has a massive advantage over custom-writing your own, namely that you don't have to write/test/debug/maintain etc. Even if you're certain with no evidence that you can improve performan...
Referring to the null object in Python
...is a built-in constant. As soon as you start Python, it's available to use from everywhere, whether in module, class, or function. NoneType by contrast is not, you'd need to get a reference to it first by querying None for its class.
>>> NoneType
NameError: name 'NoneType' is not defined
&g...
Redirect to an external URL from controller action in Spring MVC
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You can use the RedirectView. Copied from the JavaDoc:
View that redirects to an absolute, context relative, or current request relative URL
Example:
@RequestMapping("/to-be-redirected")
public RedirectView localRedirect() {
RedirectView redirectView ...
What does “zend_mm_heap corrupted” mean
...s -- do not use memcache. In the latter case, I had a configuration copied from production to a customer one-off, and the memcache configuration indicated a memcache server URI that was not available in that environment. I deleted the line and disabled memcache in the app, and the problem went away....
Get environment variable value in Dockerfile
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ARG is available from docker v1.9 onwards.
– Synesso
May 20 '16 at 6:02
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Static way to get 'Context' in Android?
...is solution be safe as long as you're not trying to access getAppContext() from a content provider?
– Magnus W
Feb 10 '14 at 17:01
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What does [].forEach.call() do in JavaScript?
...reating a quick way to call the forEach function, and you're changing this from the empty array to a list of all <a> tags, and for each <a> in-order, you are calling the function provided.
EDIT
Logical Conclusion / Cleanup
Below, there's a link to an article suggesting that we scrap a...