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MySQL/Amazon RDS error: “you do not have SUPER privileges…”
... The -f option will not make the errors go away, it will just allow the non-offending SQL statements in the file to be processed. From what I've read, RDS is choking on stored procedures in the dump file. Try creating a dump file without store procedures and see if that loads OK: mysqld...
“unmappable character for encoding” warning in Java
...o your line should read:
String copyright = "\u00a9 2003-2008 My Company. All rights reserved.";
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How to get the source directory of a Bash script from within the script itself?
...ive you the full directory name of the script no matter where it is being called from.
It will work as long as the last component of the path used to find the script is not a symlink (directory links are OK). If you also want to resolve any links to the script itself, you need a multi-line solution...
What is sharding and why is it important?
... be possible to infer the appropriate shard membership easily and automatically, and query only the relevant shard.
Some more information about sharding:
Firstly, each database server is identical, having the same table structure. Secondly, the data records are logically split up in a sharded ...
URL matrix parameters vs. query parameters
...tp://example.com/res/categories;name=foo/objects;name=green/?page=1
It really comes down to namespacing.
Note: The 'levels' of resources here are categories and objects.
If only query parameters were used for a multi-level URL, you would end up with
http://example.com/res?categories_name=foo&...
Difference between Arrays.asList(array) and new ArrayList(Arrays.asList(array))
... which makes the original array available as a list. Nothing is copied and all, only a single wrapper object is created. Operations on the list wrapper are propagated to the original array. This means that if you shuffle the list wrapper, the original array is shuffled as well, if you overwrite an e...
How to check if running as root in a bash script
...by using the root username. Nothing guarantees that the user with ID 0 is called root. It's a very strong convention that is broadly followed but anybody could rename the superuser another name.
I think the best way when using bash is to use $EUID, from the man page:
EUID Expands to the effectiv...
Difference between onStart() and onResume()
...eaning of onStart() transition state. The onResume() method is always called after onStart() . Why can't it be the onResume() is invoked after onRestart() and onCreate() methods just excluding onStart() ? What is its purpose?
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Are 2^n and n*2^n in the same time complexity?
...out when it is okay to ignore terms in a time complexity equation, specifically with non-polynomial examples.
5 Answers
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In Ruby, is there an Array method that combines 'select' and 'map'?
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I usually use map and compact together along with my selection criteria as a postfix if. compact gets rid of the nils.
jruby-1.5.0 > [1,1,1,2,3,4].map{|n| n*3 if n==1}
=> [3, 3, 3, nil, nil, nil]
jruby-1.5.0 > [1...