大约有 49,000 项符合查询结果（耗时：0.0695秒） [XML]
How to use the pass statement?
I am in the process of learning Python and I have reached the section about the pass statement. The guide I'm using defines it as being a Null statement that is commonly used as a placeholder.
...
Sqlite or MySql? How to decide? [closed]
...to run several queries at once, or run a workload that has lots of selects and a few updates, and want them to go smoothly etc.
a lot of memory usage, for example, to buffer parts of your 1Tb database in your 32G of memory.
You need to use mysql or some other server-based RDBMS.
Note that MySQL i...
How do you check what version of SQL Server for a database using TSQL?
...
Try
SELECT @@VERSION
or for SQL Server 2000 and above the following is easier to parse :)
SELECT SERVERPROPERTY('productversion')
, SERVERPROPERTY('productlevel')
, SERVERPROPERTY('edition')
From: http://support.microsoft.com/kb/321185
...
Extract method to already existing interface with ReSharper
I'm adding a new method to a class that implements an interface, and I like to use the "Extract Interface" refactoring and just add the method to the interface. But it doesn't seem like ReSharper supports adding a method signature to an already existing interface.
...
Is it better in C++ to pass by value or pass by constant reference?
...l types, except for builtin types (char, int, double, etc.), for iterators and for function objects (lambdas, classes deriving from std::*_function).
This was especially true before the existence of move semantics. The reason is simple: if you passed by value, a copy of the object had to be made an...
How do I do top 1 in Oracle?
...from MyTbl where rownum = 1
You can also use analytic functions to order and take the top x:
select max(fname) over (rank() order by some_factor) from MyTbl
share
|
improve this answer
...
Looping over a list in Python
...
Try this,
x in mylist is better and more readable than x in mylist[:] and your len(x) should be equal to 3.
>>> mylist = [[1,2,3],[4,5,6,7],[8,9,10]]
>>> for x in mylist:
... if len(x)==3:
... print x
...
[1, 2, 3]
[8, 9, 10]
...
Multiple inputs with same name through POST in php
Is it possible to get multiple inputs of the same name to post and then access them from PHP? The idea is this: I have a form that allows the entry of an indefinite number of physical addresses along with other information. If I simply gave each of those fields the same name across several entries...
Ignore with CSS?
...
With css, you can "hide" the br tags and they won't have an effect:
br {
display: none;
}
If you only want to hide some within a specific heading type, just make your css more specific.
h3 br {
display: none;
}
...
How can I list all tags in my Git repository by the date they were created?
...
Sorting by tag creation date works with annotated and lightweight tags:
git for-each-ref --sort=creatordate --format '%(refname) %(creatordate)' refs/tags
share
|
improve ...