大约有 40,000 项符合查询结果（耗时：0.0784秒） [XML]
Timer & TimerTask versus Thread + sleep in Java
...e replacement for the
Timer/TimerTask combination, as it allows multiple service threads,
accepts various time units, and doesn't require subclassing TimerTask
(just implement Runnable). Configuring ScheduledThreadPoolExecutor
with one thread makes it equivalent to Timer.
So Prefer Schedul...
UIView's frame, bounds, center, origin, when to use what?
... By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy
...
How to append the output to a file?
... By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy
...
Test if string is a number in Ruby on Rails
...def is_number? string
true if Float(string) rescue false
end
And then call it like this:
my_string = '12.34'
is_number?( my_string )
# => true
Extend String Class.
If you want to be able to call is_number? directly on the string instead of passing it as a param to your helper function, t...
Basic HTTP authentication with Node and Express 4
...he bare minimum you need: (you don't even need to parse the credentials at all)
function (req, res) {
//btoa('yourlogin:yourpassword') -> "eW91cmxvZ2luOnlvdXJwYXNzd29yZA=="
//btoa('otherlogin:otherpassword') -> "b3RoZXJsb2dpbjpvdGhlcnBhc3N3b3Jk"
// Verify credentials
if ( req.headers.a...
Difference between validate(), revalidate() and invalidate() in Swing GUI
... By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy
...
Why aren't ◎ܫ◎ and ☺ valid JavaScript variable names?
...associated with any alphabet.
The ECMAScript standard, chapter 7.6 (which all the browsers except Internet Explorer are following), states that an identifier must start with one of the following.
a Unicode letter
$ or _
\ followed by a unicode escape sequence.
The following characters of an ide...
How to rollback just one step using rake db:migrate
... By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy
...
How do you push just a single Git branch (and no other branches)?
... By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy
...
Signal handling with multiple threads in Linux
... By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy