大约有 38,000 项符合查询结果（耗时：0.0383秒） [XML]
Wrapping StopWatch timing with a delegate or lambda?
... @Jay I agree that "foreach" with Enumerable.Range looks a bit more "modern", but my tests show that it's about four times slower than a "for" loop over a large count. YMMV.
– Matt Hamilton
Oct 25 '08 at 23:16
...
How to get rid of `deprecated conversion from string constant to ‘char*’` warnings in GCC?
...ohn's answer below, about changing the signature to accept const char*, is more correct.
– jcwenger
Jun 27 '14 at 15:07
216
...
How to view file diff in git before commit
...ke to revert some changes):
git difftool myfile.txt
To use git difftool more efficiently, install and use your favourite GUI tool such as Meld, DiffMerge or OpenDiff.
Note: You can also use . (instead of filename) to see current dir changes.
In order to check changes per each line, use: git bla...
MySQL: Insert record if not exists in table
...
Thanks that helped. My actual problem is far more complex and the column just cannot be unique and I cannot depend on the primary key. But this is exactly what I was looking for.
– Rupert
Jul 2 '10 at 10:41
...
Find first element in a sequence that matches a predicate
...
@geekazoid: seq.find(&method(:predicate)) or even more concise for instance methods e.g.: [1,1,4].find(&:even?)
– jfs
Jul 20 '15 at 5:07
16
...
Relationship between SciPy and NumPy
...umpy.lib.scimath. Looking at that code, it says:
"""
Wrapper functions to more user-friendly calling of certain math functions
whose output data-type is different than the input data-type in certain
domains of the input.
For example, for functions like log() with branch cuts, the versions in this
...
How can I check whether a radio button is selected with JavaScript?
....checked) {
//Female radio button is checked
}
The above could be made more efficient depending on the exact nature of your markup but that should be enough to get you started.
If you're just looking to see if any radio button is selected anywhere on the page, PrototypeJS makes it very easy.
...
Tables instead of DIVs [duplicate]
...le; use it when you have tabular data, but not otherwise.
Then you have a more semantic page and you don't need quite as many classes defined in your CSS; you can target the tags directly instead. Possibly most importantly, you have a page that will score much better with Google (anecdotally) than...
What's the difference between echo, print, and print_r in PHP?
...
print and echo are more or less the same; they are both language constructs that display strings. The differences are subtle: print has a return value of 1 so it can be used in expressions whereas echo has a void return type; echo can take mult...
Get the current first responder without using a private API
...
|
show 9 more comments
531
...