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Is there a Java standard “both null or equal” static method?
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With Java 7 you can now directly do a null safe equals:
Objects.equals(x, y)
(The Jakarta Commons library ObjectUtils.equals() has become obsolete with Java 7)
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Why doesn't Haskell's Prelude.read return a Maybe?
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Edit: As of GHC 7.6, readMaybe is available in the Text.Read module in the base package, along with readEither: http://hackage.haskell.org/packages/archive/base/latest/doc/html/Text-Read.html#v:readMaybe
Great question! The type of read itself isn't changing anytime soon bec...
Comprehensive beginner's virtualenv tutorial? [closed]
...hat it is and the basics of getting/using it. (The second for some reason explained activate but neglected deactivate o_O). I'm still hoping for more elaboration on when to use it (and when not to), and deeper examples.
– Dan Burton
May 1 '11 at 7:13
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Why can outer Java classes access inner class private members?
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This answer explains why nested classes have access to private members of their outer class. But the question is why does the outer class have access to private members of nested classes.
– Andrew
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In javascript, is an empty string always false as a boolean?
...null are always evaluated as false; everything else is true.
And in your example, b is false after evaluation. (I think you mistakenly wrote true)
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How can I debug git/git-shell related problems?
..._TRACE options, beyond the core one. Here's the über-verbose option: set -x; GIT_TRACE=2 GIT_CURL_VERBOSE=2 GIT_TRACE_PERFORMANCE=2 GIT_TRACE_PACK_ACCESS=2 GIT_TRACE_PACKET=2 GIT_TRACE_PACKFILE=2 GIT_TRACE_SETUP=2 GIT_TRACE_SHALLOW=2 git pull origin master -v -v; set +x
– Paul...
Setting the MySQL root user password on OS X
I just installed MySQL on Mac OS X. The next step was setting the root user password, so I did this next:
23 Answers
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Should struct definitions go in .h or .c file?
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| int other_stuff; | | extern void |
| }; | | api_func(struct s *foo, int x); |
| | +---------------------------------+
| extern void | +-----...
Warning: mysql_connect(): [2002] No such file or directory (trying to connect via unix:///tmp/mysql.
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For some reason mysql on OS X gets the locations of the required socket file a bit wrong, but thankfully the solution is as simple as setting up a symbolic link.
You may have a socket (appearing as a zero length file) as /tmp/mysql.sock or /var/mysql/m...
How to draw a path on a map using kml file?
... I can see.
To display the route, you should parse the kml data i.e. via SAX parser, then display the route markers on the map.
See the code below for an example, but it's not complete though - just for you as a reference and get some idea.
This is a simple bean I use to hold the route information...