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How does Rails keep track of which migrations have run for a database?
...g row from schema_migrations.
For example, running a migration file named 20120620193144_create_users.rb will insert a new row with a version of 20120620193144 into the schema_migrations table.
You are free at any point to introduce migrations with earlier versions. Rails will always run any new m...
Get environment variable value in Dockerfile
... request_domain
or if you'd prefer a default value:
ARG request_domain=127.0.0.1
Now you can reference this variable inside your Dockerfile:
ENV request_domain=$request_domain
then you will build your container like so:
$ docker build --build-arg request_domain=mydomain Dockerfile
Note 1...
Why does `True == False is False` evaluate to False? [duplicate]
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edited Jun 20 '13 at 17:43
answered Jun 19 '13 at 22:11
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How can I put a database under git (version control)?
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25 Answers
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pdftk compression option
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I had the same problem and found two different solutions (see this thread for more details). Bo...
Why use static_cast(x) instead of (int)x?
... Jarvis
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answered Sep 19 '08 at 17:23
Euro MicelliEuro Micelli
30.3k7...
What is the most efficient Java Collections library? [closed]
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Hibernate openSession() vs getCurrentSession()
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As explained in this forum post, 1 and 2 are related. If you set hibernate.current_session_context_class to thread and then implement something like a servlet filter that opens the session - then you can access that session anywhere else by using the SessionFactor...
how to use sed, awk, or gawk to print only what is matched?
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...and the "p" option to print the the match, which I didn't know about either. Thanks again.
– Stéphane
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Get Selected index of UITableView
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NSIndexPath *selectedIndexPath = [tableView indexPathForSelectedRow];
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