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What does the question mark in Java generics' type parameter mean?
...d is a bounded wildcard, covered in Item 31 of Effective Java 3rd Edition, starting on page 139. The same chapter from the 2nd Edition is available online as a PDF; the part on bounded wildcards is Item 28 starting on page 134.
Update: PDF link was updated since Oracle removed it a while back. It...
Is gettimeofday() guaranteed to be of microsecond resolution?
...uction execution.
Most OS's synchronize the counters on the CPUs when they start, so
the answer is good to within a couple of nano-seconds.
The hibernating comment is probably true, but in practice you
probably don't care about timings across hibernation boundaries.
regarding speedstep: Newer Intel ...
How to place and center text in an SVG rectangle
...lues for
attributes ‘x’, ‘y’, ‘dx’ and ‘dy’ to
set new start positions for those
characters who start new lines.
(This approach allows user text
selection across multiple lines of
text -- see Text selection and
clipboard operations.)
Express the
text to be rendered...
Connect to a locally built Jekyll Server using mobile devices in the LAN
...
Without --host=0.0.0.0 Jekyll will output something like this when you start up:
$ jekyll serve
[...]
Server address: http://127.0.0.1:4000/
Server running... press ctrl-c to stop.
But with --host=0.0.0.0 (or host: 0.0.0.0 in _config.yml) you'll notice that it's listening on all interfaces (r...
How to match any non white space character except a particular one?
...n and when as line beginning ? In that respect, why this wont match a line starting with number of white spaces $0~/\s*^\s/
– Alexander Cska
Mar 26 '19 at 21:43
...
Inheritance vs. Aggregation [closed]
...pposed to respond to. I would like that people first read questions before start translating. Do yo blindly promote design patters to become a member of the elite club?
– Val
Jan 17 '13 at 19:19
...
How can I safely encode a string in Java to use as a filename?
...il, rather than the head of your string, use:
// Truncate the string.
int start = Math.max(0,encoded.length()-MAX_LENGTH);
return encoded.substring(start,encoded.length());
Decoding
To convert the filename back to the original string, use:
URLDecoder.decode(filename, "UTF-8");
Limitations
Be...
Why do we use arrays instead of other data structures?
...t is in memory. All I know is where the root (P1) is, so instead I have to start at P1, and follow each pointer to the desired node.
This is a O(N) look up time (The look up cost increases as each element is added). It is much more expensive to get to P1000 compared to getting to P4.
Higher level...
How can you get the SSH return code using Paramiko?
...licy())
#client.set_missing_host_key_policy(paramiko.AutoAddPolicy())
def start():
try :
client.connect('127.0.0.1', port=22, username='ubuntu', password=pw)
return True
except Exception as e:
#client.close()
print(e)
return False
while start():
...
Is there a perfect algorithm for chess? [closed]
...inite. Huge, but finite. There's perfect information. There are defined start and end-states, There are no coin-tosses or dice rolls.
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