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Tag Archives: session

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Technology Insights

Ruby Interactive Shell: Clear All Variables That Have Been Set In IRB Session

InsightsBy alexDecember 1, 2009Leave a comment

The Interactive Ruby Shell, or IRB, doesn’t have a way to clear all variables that I am aware of besides quitting irb and then restarting irb however you can simulate this by invoking subirbs. Subirbs are jobs underneath the main irb session that will allow you to work within irb on different code at the…

Technology Insights

Adding members to Ruby objects dynamically

InsightsBy Chirag PatelApril 23, 2009Leave a comment

If you want to dynamically add a member to a Ruby object, use the hash/array brackets and symbol (:user_id) as shown in the iRb session below. As you can see the dot notation will not work. bash >> d = AccessMode.find(1) => #<AccessMode id: 1, device_id: 31218, mode: "dialup", timestamp: "2007-12-25 15:52:55"> >> d[:user_id] =…

Technology Insights

Use Multiple Shells From One Terminal Window on Linux

InsightsBy alexJanuary 19, 2009Leave a comment

You can use the Linux screen command to operate multiple shells from one terminal window on Linux. Below is the command to install screen on CentOS Linux. bash yum install screen Using screen is easy. First SSH to your server as you normally would and before running any commands that may take awhile type “screen”.…

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