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Unable to resolve host “” No address associated with hostname
...oblem. I have permissions set up correctly. URLConnection is working fine most of the time. But sometimes, i get this error several times in a row. It is especially hard to debug, since it only comes up from time to time...
– hendrix
Nov 22 '12 at 12:14
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Unix command-line JSON parser? [closed]
Can anyone recommend a Unix (choose your flavor) JSON parser that could be used to introspect values from a JSON response in a pipeline?
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Copy all the lines to clipboard
...pboard in VI editor. I tried y G but it's not using clipboard to store those lines.
25 Answers
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Execution time of C program
...10ms or lower, but on older Windows machines (from the Win98 era) it was closer to 60ms.
clock() is standard C; it works "everywhere". There are system-specific functions, such as getrusage() on Unix-like systems.
Java's System.currentTimeMillis() does not measure the same thing. It is a "wall clo...
Replacing some characters in a string with another character
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On *BSD (and thus, OSX), sed -E is (basically) equivalent to sed -r on many Linux distros, If you use sed 's/[xyz][xyz]*/_/g' you don't need the option. Of course, this is equivalent to tr -s xyz _ so no real need for sed here.
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How can I use grep to show just filenames on Linux?
...t is searched, a pathname of (standard input) will
be written, in the POSIX locale. In other locales, standard input may be
replaced by something more appropriate in those locales.
You also do not need -H in this case.
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Redis is single-threaded, then how does it do concurrent I/O?
Trying to grasp some basics of Redis I came across an interesting blog post .
2 Answers
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How do I return multiple values from a function? [closed]
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Named tuples were added in 2.6 for this purpose. Also see os.stat for a similar builtin example.
>>> import collections
>>> Point = collections.namedtuple('Point', ['x', 'y'])
>>> p = Point(1, y=2)
>>> p.x, p.y
1 2
>>> p[0...
How do I see the current encoding of a file in Sublime Text?
...me Text in this session. Once saved by ST , it then reports 'UTF8' until closed (on re-opening the guessing starts over).
– mklement0
Dec 24 '15 at 3:48
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Do browsers send “\r\n” or “\n” or does it depend on the browser?
... all sorts of line terminators. (Note that in addition to CRLF and LF, Mac OS-9 used CR alone, and there are still a few of those around. The Unicode standard (section 5.8) specifies a wide range of character sequences that should be recognized as line terminators; there's a list of them here.)
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