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PSQLException: current transaction is aborted, commands ignored until end of transaction block

... I got this error using Java and PostgreSQL doing an insert on a table. I will illustrate how you can reproduce this error: org.postgresql.util.PSQLException: ERROR: current transaction is aborted, commands ignored until end of transaction block Summa...
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The model used to open the store is incompatible with the one used to create the store

I created a Core Data model in xcode 3.2 and after upgrading in Xcode 4.2, I then added a new entity of the NSManagedObject subclass (refer to the new entity). ...
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How do you sign a Certificate Signing Request with your Certification Authority?

...he ca module openssl ca ... ... You are missing the prelude to those commands. This is a two-step process. First you set up your CA, and then you sign an end entity certificate (a.k.a server or user). Both of the two commands elide the two steps into one. And both assume you have a an OpenSSL con...
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创建自定义 TinyWebDB 服务 · App Inventor 2 中文网

...ar phone, TinyWebDB can be used to facilitate communication between phones and apps (e.g., multi-player games). By default, the TinyWebDB component stores data on a test service provided by App Inventor, http://tinywebdb.appinventor.mit.edu/ . This service is helpful for testing, but it is shared b...
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Why would introducing useless MOV instructions speed up a tight loop in x86_64 assembly?

...sing in the branch prediction table moving the branch eliminated the alias and allowed the branch to be predicted correctly Your Core2 doesn't keep a separate history record for each conditional jump. Instead it keeps a shared history of all conditional jumps. One disadvantage of global branch pr...
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Good introduction to the .NET Reactive Framework [closed]

Aside from the Microsoft documentation, is there a good introduction and tutorial to the Microsoft Reactive (Rx) framework? ...
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How to convert OutputStream to InputStream?

I am on the stage of development, where I have two modules and from one I got output as a OutputStream and second one, which accepts only InputStream . Do you know how to convert OutputStream to InputStream (not vice versa, I mean really this way) that I will be able to connect these two part...
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Why should we NOT use sys.setdefaultencoding(“utf-8”) in a py script?

.... Also, the use of sys.setdefaultencoding() has always been discouraged, and it has become a no-op in py3k. The encoding of py3k is hard-wired to "utf-8" and changing it raises an error. I suggest some pointers for reading: http://blog.ianbicking.org/illusive-setdefaultencoding.html http://nedb...
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Make fill entire screen?

...height left my background white w/o the background-color applied when I expanded some collapsible divs in the middle of my page. min-height fixed that. – Stephen P Mar 9 '13 at 1:03 ...
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How do you debug MySQL stored procedures?

...milar to you. I'll usually include a DEBUG param that defaults to false and I can set to true at run time. Then wrap the debug statements into an "If DEBUG" block. I also use a logging table with many of my jobs so that I can review processes and timing. My Debug code gets output there as wel...