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std::function and std::bind: what are they, and when should they be used?
...tion is more generic to work with lambdas, context capture, member methods etc.
– Shital Shah
Sep 23 '19 at 8:09
bind(...
How do you manage databases in development, test, and production?
...elopment, and a maintenance branch for bug fixes, short term enhancements, etc. Inevitably, the need arose to make changes to the schema in the branch. At this point, we already had dbChanges_n+1.sql in the Trunk, so we ended up going with a scheme like the following:
dbChanges_n.1.sql
dbChanges_n...
LEN function not including trailing spaces in SQL Server
...
Also for varchar etc. this can be collation dependant and not even a straight forward division by 2 is reliable. See example here
– Martin Smith
Jul 13 '13 at 11:33
...
Number of processors/cores in command line
...
The most simplest tool comes with glibc and is called getconf:
$ getconf _NPROCESSORS_ONLN
4
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How do I reference a javascript object property with a hyphen in it?
Using this script to make a style object of all the inherited etc styles.
11 Answers
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How should I handle “No internet connection” with Retrofit on Android
...pter
RestAdapter.Builder().setEndpoint(serverHost)
.setClient(new ConnectivityAwareUrlClient(new OkHttpClient(), ...))
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Why doesn't django's model.save() call full_clean()?
...orms with excluded fields, models with default values, pre_save() signals, etc.
Sources you might be intrested in:
http://code.djangoproject.com/ticket/13100
http://groups.google.com/group/django-developers/browse_frm/thread/b888734b05878f87
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difference between primary key and unique key
... there are so many physical entities (such as people, resources, machines, etc.) and virtual entities (their Tasks, transactions, activities).
Typically, business needs to record and process information of those business entities.
These business entities are identified within a whole business doma...
NSNotificationCenter addObserver in Swift
...velDidChange, .UIApplicationDidFinishLaunching, .UITextFieldTextDidChange, etc.
You can extend Notification.Name with your own custom notifications in order to stay consistent with the system notifications:
// Definition:
extension Notification.Name {
static let yourCustomNotificationName = No...
Python: Tuples/dictionaries as keys, select, sort
... 'blue'])
for k in blue_fruit:
print k[0], data[k] # prints 'banana 24', etc
Sorting works because tuples have natural ordering if their components have natural ordering.
With keys as rather full-fledged objects, you just filter by k.color == 'blue'.
You can't really use dicts as keys, but yo...