大约有 40,000 项符合查询结果（耗时：0.0648秒） [XML]
What is the Python equivalent of Matlab's tic and toc functions?
...e stuff
Sometimes I find this technique more convenient than timeit - it all depends on what you want to measure.
share
|
improve this answer
|
follow
|
...
How to detect that animation has ended on UITableView beginUpdates/endUpdates?
...ates . I am also using beginUpdates/endUpdates when adjusting rowHeight. All these operations are animated by default.
7 ...
Possibility of duplicate Mongo ObjectId's being generated in two different collections?
...que ID (please let me know if there are more):
Before this discussion, recall that the BSON Object ID consists of:
[4 bytes seconds since epoch, 3 bytes machine hash, 2 bytes process ID, 3 bytes counter]
Here are the three possibilities, so you judge for yourself how likely it is to get a dupe:
...
Reading file contents on the client-side in javascript in various browsers
... By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy
...
Renaming table in rails
... By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy
...
What is the difference between String.Empty and “” (empty string)?
...ich makes string.Empty more efficient.
In version 2.0 and later of .NET, all occurrences of "" refer to the same string literal, which means "" is equivalent to .Empty, but still not as fast as .Length == 0.
.Length == 0 is the fastest option, but .Empty makes for slightly cleaner code.
See the ...
How can I use optional parameters in a T-SQL stored procedure?
...ring stored procedures do not float around, but are being called from some service layer. This leaves the option of moving away business logic (filtering) from SQL to service layer.
One example is using LINQ2SQL to generate the query based on provided filters:
public IList<SomeServiceModel&...
Creating a new dictionary in Python
I want to build a dictionary in Python. However, all the examples that I see are instantiating a dictionary from a list, etc . ..
...
Is there a NumPy function to return the first index of something in an array?
...:
itemindex = numpy.where(array==item)
The result is a tuple with first all the row indices, then all the column indices.
For example, if an array is two dimensions and it contained your item at two locations then
array[itemindex[0][0]][itemindex[1][0]]
would be equal to your item and so woul...
How do the Proxy, Decorator, Adapter, and Bridge Patterns differ?
... lazy-instantiate an object, or hide the fact that you're calling a remote service, or control access to the object.
Decorator is also called "Smart Proxy." This is used when you want to add functionality to an object, but not by extending that object's type. This allows you to do so at runtime.
A...