大约有 48,000 项符合查询结果（耗时：0.0935秒） [XML]
Is a Java hashmap search really O(1)?
I've seen some interesting claims on SO re Java hashmaps and their O(1) lookup time. Can someone explain why this is so? Unless these hashmaps are vastly different from any of the hashing algorithms I was bought up on, there must always exist a dataset that contains collisions.
...
How do you connect to multiple MySQL databases on a single webpage?
I have information spread out across a few databases and want to put all the information onto one webpage using PHP. I was wondering how I can connect to multiple databases on a single PHP webpage.
...
How do I properly clean up Excel interop objects?
I'm using the Excel interop in C# ( ApplicationClass ) and have placed the following code in my finally clause:
41 Answers
...
How to fix committing to the wrong Git branch?
...mit to the wrong branch.
How do I undo the last commit in my master branch and then take those same changes and get them into my upgrade branch?
...
Ball to Ball Collision - Detection and Handling
...y mass, the new velocities can be calculated using the equations (where v1 and v2 are the velocities after the collision, and u1, u2 are from before):
If the balls have the same mass then the velocities are simply switched. Here's some code I wrote which does something similar:
void Simulati...
AsyncTask threads never die
...s to fetch data in response to the user pressing a button. This works well and keeps the interface responsive while fetching the data, but when I checked out what was going on in the Eclipse debugger, I found out that every time a new AsyncTask was created (which is quite often, because they can o...
Mysql - How to quit/exit from stored procedure
...
can you leave and return a value?
– ygaradon
Apr 8 '14 at 10:28
36
...
How do I read the source code of shell commands?
I would like to read the actual source code which the linux commands are written with. I've gained some experience using them and now I think it's time to interact with my machine at a deeper level.
...
Include another HTML file in a HTML file
I have 2 HTML files, suppose a.html and b.html . In a.html I want to include b.html .
37 Answers
...
Android List Preferences: have summary as selected value?
...
The simplest way to do this is just to have Android do it for you. Assuming you want the summary to match the selected value, you can simply set the summary of the ListPreference to "%s" using either XML or the setSummary method in Java. For example:
<ListPrefere...