大约有 38,000 项符合查询结果（耗时：0.0340秒） [XML]
How to analyze a java thread dump?
I am trying to understand more about java, especially about memory management and threads.
For this reason I have recently found interest in looking at thread dumps.
...
what is faster: in_array or isset? [closed]
...ng an array with values (10,000 in the test below), forcing in_array to do more searching.
isset: 0.009623
in_array: 1.738441
This builds on Jason's benchmark by filling in some random values and occasionally finding a value that exists in the array. All random, so beware that times will fluct...
nodejs vs node on ubuntu 12.04
...on I posted up here worked for me several times, users have reported a few more solutions within the comments:
From @user229115
sudo update-alternatives --install /usr/bin/node node /usr/bin/nodejs 10
From AskUbuntu (user leftium)
sudo apt-get --purge remove node
sudo apt-get --purge remove node...
Is there a valid reason for enforcing a maximum width of 80 characters in a code file, this day and
...mewhat depending on other parameters) because longer lines do make reading more difficult. Maximum code line length could be argued, but 80 is convenient for historical and practical reasons.
– Steve S
Jan 26 '09 at 16:53
...
How to “properly” print a list?
...In Python 3 (where print is a builtin function and not a syntax feature anymore):
mylist = ['x', 3, 'b']
print('[%s]' % ', '.join(map(str, mylist)))
Both return:
[x, 3, b]
This is using the map() function to call str for each element of mylist, creating a new list of strings that is then joine...
What is your most productive shortcut with Vim?
...rstand basic up, down, left, and right cursor movements then vi will be no more productive than a copy of "notepad" for you. (Okay, you'll still have syntax highlighting and the ability to handle files larger than a piddling ~45KB or so; but work with me here).
vi has 26 "marks" and 26 "registers."...
Convert sqlalchemy row object to python dict
...Best answer in this thread, don't know why everyone else is proposing much more complicated solutions.
– Dave Rawks
Jun 15 '12 at 15:45
95
...
Twitter Bootstrap - add top space between rows
... no way, these answers are slightly different IMHO. This one is more usable as it embraces the "name your class style so your html reads easier" and you can read margin-top in the html instead of rowSpecificForName. This answer is more inline with twitter bootstrap patterns.
...
Split code over multiple lines in an R script
...> setwd(paste("~/a/very/long/path/here",
"/and/then/some/more",
"/and/then/some/more",
"/and/then/some/more", sep=""))
which also illustrates that it is perfectly fine to break code across multiple lines.
...
Try-catch speeding up my code?
...cessary to generate a local. If it allows the JITter to produce measurably more performant code, perhaps the C# compiler should be a bit more careful about generating unnecessary locals...
– Timwi
Jan 25 '12 at 20:37
...