大约有 19,600 项符合查询结果（耗时：0.0408秒） [XML]
What is the meaning of prepended double colon “::”?
...ction or type of the some class;
in a class member function, some can be a base type of the current type (or the current type itself) and thing is then one member of this class, a type, function or object.
You can also have nested scope, as in some::thing::bad. Here each name could be a type, an o...
UIDevice uniqueIdentifier deprecated - What to do now?
...urns a fixed value when querying the MAC to specifically thwart the MAC as base for an ID scheme. So you now really should use -[UIDevice identifierForVendor] or create a per-install UUID.
share
|
i...
Run PHP Task Asynchronously
...d this one while writing this answer, but looks interesting
dropr is a PHP based message queue project, but hasn't been actively maintained since Sep 2010
php-enqueue is a recently (2017) maintained wrapper around a variety of queue systems
Finally, a blog post about using memcached for message queu...
Error in : object of type 'closure' is not subsettable
...a matter of good practise, you should usually avoid naming variables after base-R functions. (Calling variables data is a common source of this error.)
There are several related errors for trying to subset operators or keywords.
`+`[1]
## Error in `+`[1] : object of type 'builtin' is not subse...
passing several arguments to FUN of lapply (and others *apply)
... arg1, arg2)
See man page:
https://stat.ethz.ch/R-manual/R-devel/library/base/html/mapply.html
share
|
improve this answer
|
follow
|
...
How does TransactionScope roll back transactions?
... integration test where I will be inserting a number of objects into a database and then checking to make sure whether my method retrieves those objects.
...
How do you delete an ActiveRecord object?
...
Why it only updates deleted_at column data in my database? How can I delete the whole row of data?
– TommyQu
Sep 28 '17 at 15:42
...
What's the opposite of 'make install', i.e. how do you uninstall a library in Linux?
...
If sudo make uninstall is unavailable:
In a Debian based system, instead of (or after*) doing make install you can run sudo checkinstall to make a .deb file that gets automatically installed. You can then remove it using the system package manager (e.g. apt/synaptic/aptitude/...
calculating the difference in months between two dates
...if today is the 14th of March, then the two pervious months are calculated based on the fact that jan had 31 days in it, and feb hasd 29 days in it. now, youre correct in that my method is not the definition of a "general" month, & yours is! However, mine only applies if you are reporting things...
How to use php serialize() and unserialize()
...common denominator" that can be handled by things other than PHP, like databases, text files, sockets. The standard PHP function serialize is just a format to express such a thing, it serializes a data structure into a string representation that's unique to PHP and can be reversed into a PHP object ...