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What is the best way to clear a session variable in rails?

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Compress files while reading data from STDIN

Is it possible to compress (create a compressed archive) data while reading from stdin on Linux? 3 Answers ...
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delete_all vs destroy_all?

I am looking for the best approach to delete records from a table. For instance, I have a user whose user ID is across many tables. I want to delete this user and every record that has his ID in all tables. ...
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How to get thread id from a thread pool?

...e a fixed thread pool that I submit tasks to (limited to 5 threads). How can I find out which one of those 5 threads executes my task (something like "thread #3 of 5 is doing this task")? ...
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How to run multiple DOS commands in parallel?

How to run multiple dos commands? 3 Answers 3 ...
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Can I have an IF block in DOS batch file?

In a DOS batch file we can only have 1 line if statement body? I think I found somewhere that I could use () for an if block just like the {} used in C-like programming languages, but it is not executing the statements when I try this. No error message either. This my code: ...
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Ruby / Rails: convert int to time OR get time from integer?

We can do this: 2 Answers 2 ...
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How do I get the backtrace for all the threads in GDB?

Is there an equivalent command in GDB to that of WinDbg's "!process 0 7"? 2 Answers 2 ...
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How can you hide database output in Rails console?

...rsion of Rails, I'm guessing from 3 up, database queries are output to the console. This is useful most of the time, but how can you hide it when you do not want to see it? ...
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ADO.NET DataRow - check for column existence

How do I check for the existence of a column in a datarow? 2 Answers 2 ...