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Finding duplicate values in MySQL

I have a table with a varchar column, and I would like to find all the records that have duplicate values in this column. What is the best query I can use to find the duplicates? ...
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Receive result from DialogFragment

...tFragment(this, MY_REQUEST_CODE) from the place where you show the dialog, and then when your dialog is finished, from it you can call getTargetFragment().onActivityResult(getTargetRequestCode(), ...), and implement onActivityResult() in the containing fragment. It seems like an abuse of onActivity...
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Difference between JAX-WS, Axis2 and CXF

...gs besides just JAX-WS. It has a compliant JAX-RS implementation as well and supports exposing services as both REST and SOAP very well. Has a W3C compliant SOAP/JMS implementation if that type of things is required. Basically, lots of stuff not available from the in-jdk JAX-WS impl. Also see:...
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How to overload functions in javascript?

...ariable arguments - You can pass different sets of arguments (in both type and quantity) and the function will behave in a way that matches the arguments passed to it. Default arguments - You can define a default value for an argument if it is not passed. Named arguments - Argument order becomes irr...
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What is the difference between Left, Right, Outer and Inner Joins?

... Simple Example: Lets say you have a Students table, and a Lockers table. In SQL, the first table you specify in a join, Students, is the LEFT table, and the second one, Lockers, is the RIGHT table. Each student can be assigned to a locker, so there is a LockerNumber column in...
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What regular expression will match valid international phone numbers?

...rmat for matching a generic international phone number. I replaced the US land line centric international access code 011 with the standard international access code identifier of '+', making it mandatory. I also changed the minimum for the national number to at least one digit. Note that if you en...
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How can I apply a function to every row/column of a matrix in MATLAB?

... Many built-in operations like sum and prod are already able to operate across rows or columns, so you may be able to refactor the function you are applying to take advantage of this. If that's not a viable option, one way to do it is to collect the rows or c...
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Under what circumstances are linked lists useful?

... with a single CAS (+retries). In a modern GC-d environment - such as Java and .NET - the ABA problem can easily be avoided. Just wrap items you add in freshly created nodes and do not reuse those nodes - let the GC do its work. The page on the ABA problem also provides the implementation of a lock...
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Regular expression to check if password is “8 characters including 1 uppercase letter, 1 special cha

... The regular expression you are after will most likely be huge and a nightmare to maintain especially for people who are not that familiar with regular expressions. I think it would be easier to break your regex down and do it one bit at a time. It might take a bit more to do, but I am ...
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How do I upgrade my ruby 1.9.2-p0 to the latest patch level using rvm?

...2. Finally, to install the new ruby version, just run rvm install 1.9.2 - and wait for it to compile! share | improve this answer | follow | ...