大约有 44,000 项符合查询结果（耗时：0.0647秒） [XML]
How to drop all user tables?
...
This worked very well and it doesn't require that I have authority on the Oracle server to delete and re-add my user. Bravo. Great answer.
– djangofan
May 11 '11 at 22:43
...
How can I check if a command exists in a shell script? [duplicate]
...my first shell script. In my script I would like to check if a certain command exists, and if not, install the executable. How would I check if this command exists?
...
What is the maximum value for an int32?
...correctly in the mirror. Otherwise you'll see 746,384,741,2 which is wrong and would be embarrassing.
– Larry S
Apr 21 '16 at 20:20
127
...
How to call a function from a string stored in a variable?
...
Also see my answer below if you are dealing with classes and methods. I didn't expect what I found.
– Chris K
Jan 28 '13 at 23:16
...
C++ performance vs. Java/C#
My understanding is that C/C++ produces native code to run on a particular machine architecture. Conversely, languages like Java and C# run on top of a virtual machine which abstracts away the native architecture. Logically it would seem impossible for Java or C# to match the speed of C++ because ...
How can I get the full/absolute URL (with domain) in Django?
...
Use handy request.build_absolute_uri() method on request, pass it the relative url and it'll give you full one.
By default, the absolute URL for request.get_full_path() is returned, but you can pass it a relative URL as the first...
ERROR 1452: Cannot add or update a child row: a foreign key constraint fails
...relationships involve a parent table that holds the
central data values, and a child table with identical values pointing
back to its parent. The FOREIGN KEY clause is specified in the child
table.
It will reject any INSERT or UPDATE operation that attempts to create
a foreign key value...
Make function wait until element exists
...you can put your function. The interval solution is really a bad solution and should be used only if nothing else works.
share
|
improve this answer
|
follow
...
MySQL Query GROUP BY day / month / year
...
GROUP BY YEAR(record_date), MONTH(record_date)
Check out the date and time functions in MySQL.
share
|
improve this answer
|
follow
|
...
Are there strongly-typed collections in Objective-C?
I'm new to Mac/iPhone programming and Objective-C. In C# and Java we have "generics", collection classes whose members can only be of the type declared. For example, in C#
...