1. Ruby http://tryruby.org2. Hpricot http://hpricot.com3. Regular expressions http://rubular.com4. Exceptions http://hoptoadapp.com/5. Application Performance http://newrelic.com6. Ruby Doc http://www.ruby-doc.org/7. Rails API http://api.rubyonrails.org/8. Ruby gems sources http://rubyforge.org / http://gems.github.com / http://gemcutter.org9. Listing remote gems from source gem list --remote --source http://gems.github.com10. List of Rails Plugins http://wiki.rubyonrails.org/rails/pages/Pluginshttp://www.agilewebdevelopment.com/plugins
Tag: RubyLearning
Dynamic creation of variables in ruby
1. To create local variables in ruby dynamically.Use eval method in rubyree-1.8.7-2010.01 > eval("local=4") => 4 ree-1.8.7-2010.01 > p local4ree-1.8.7-2010.01 > eval("local_#{1}=4") => 4 ree-1.8.7-2010.01 > puts local_142. To create & get instance variables dynamically in ruby.instance_varaiable_set & instance_varaiable_get methods are provided and no need to do it using eval.ree-1.8.7-2010.01 > (0..3).each do |i|ree-1.8.7-2010.01 > instance_variable_set("@instance_#{i}", i*i+1)ree-1.8.7-2010.01 ?> … Continue reading Dynamic creation of variables in ruby
Eval method in ruby
Eval method in ruby executes string/expression passed as parameter.Example:ree-1.8.7-2010.01 > eval("5+3") => 8 ree-1.8.7-2010.01 > eval("a=5") => 5 ree-1.8.7-2010.01 > eval("b||=a") => 5 Its part of ruby meta-programming and not recommended approach unless there is no any alternative to do.
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