大约有 34,900 项符合查询结果（耗时：0.0737秒） [XML]
How to avoid “if” chains?
...
David
13.7k2424 gold badges7575 silver badges9898 bronze badges
answered Jun 26 '14 at 12:33
ShoeShoe
...
Difference between EXISTS and IN in SQL?
...
The exists keyword can be used in that way, but really it's intended as a way to avoid counting:
--this statement needs to check the entire table
select count(*) from [table] where ...
--this statement is true as soon as one match i...
Reading specific lines only
...line
elif i == 29:
# 30th line
elif i > 29:
break
fp.close()
Note that i == n-1 for the nth line.
In Python 2.6 or later:
with open("file") as fp:
for i, line in enumerate(fp):
if i == 25:
# 26th line
elif i == 29:
# 30th l...
Injecting Mockito mocks into a Spring bean
I would like to inject a Mockito mock object into a Spring (3+) bean for the purposes of unit testing with JUnit. My bean dependencies are currently injected by using the @Autowired annotation on private member fields.
...
How to get Top 5 records in SqLite?
I have tried this which did not work.
6 Answers
6
...
Loop through files in a folder using VBA?
I would like to loop through the files of a directory using vba in Excel 2010.
6 Answers
...
What specific productivity gains do Vim/Emacs provide over GUI text editors?
This isn't meant as a troll or flamebait or anything like that. I've been using Vim as my console-editor of choice for a couple months now (for editing configuration files while in my terminal), but I don't think I could stand it for my normal, every day work of writing web applications, which I ...
MYSQL OR vs IN performance
...
I needed to know this for sure, so I benchmarked both methods. I consistenly found IN to be much faster than using OR.
Do not believe people who give their "opinion", science is all about testing and evidence.
I ran a loop of 1000x the...
Is it possible to change a UIButtons background color?
...
This can be done programmatically by making a replica:
loginButton = [UIButton buttonWithType:UIButtonTypeCustom];
[loginButton setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
loginButton.backgroundColor = [UIColor whiteColor];
loginButton.laye...
Make an HTTP request with android
...ave searched everywhere but I couldn't find my answer, is there a way to make an simple HTTP request? I want to request an PHP page / script on one of my website but I don't want to show the webpage.
...