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Jun
symbolwhat it does +concatenate "a" "b" => -1 >> "a" "a" => 0 >> "b" "a" => 1 Some more string methods, using examples: >> s = "hello" => "hello" >> s.concat(" world") => "hello world" # .concat is same as + >> s.insert(5, " there") => "hello there world" # inserts substring into part of the...
Read More1) Use the "system" method system "ls" 2) Or use backticks. Note that backticks support you returning to the results and assigning them to a variable res = `ls` res now holds the directory listing returned by ls...
Read MoreSome great shortcuts for script generation. I always try to start by building scaffold for any new entity, then remove the scaffold as needed, leaving only the pieces of the scaffold which I need. to generate a new model: script/generate scaffold Person age:integer first:string last:string some_list_id:integer * This...
Read Moredef is_a_number?(s) s.to_s.match(/\A[+-]?\d+?(\.\d+)?\Z/) == nil? false : true end ...
Read MoreJun
I’m working with a plugin that I wrote. I want to pull the plugin into an app I’m writing, but still be able to make changes to the plugin and commit those changes back to my repository.
Jun
How can I search for available rake tasks? rake -T | grep gem (where "gem" is the thing you are searching for) The above example will return all of the rake tasks relating to gems: rake gems ...
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Gems are installed by sources, or a repository which holds several gems. Generally all the gems you will need are either in gems.rubyforge.org or gems.github.com, so once you setup these two sources you don't need to setup more sources until you need a gem from...
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