Ruby Certification Exam Preparation
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Ruby 1.8.7 Exam Hell Curse
By Sir Flavio, the VitDoomed to learn this crap prog lang
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Scope• The execution environment
Execution method Command-line options Environment variables irb
• Syntax
Comment Literal Variables, constants, and scopeOperators Conditional branchingLoopsException handling Method calls BlocksMethod definition Class definition Module definition • Built-in libraries
Built-in functions Built-in classes • Object orientation
Polymorphism Inheritance mix-in
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Crap links
• http://www.ruby.or.jp/en/certification/examination/
• http://ruby-doc.org/core-1.8.7/• http://www.minituku.net/• http://rexaminator.com/• http://www.brainbench.com/xml/bb/common
/testcenter/consumer/taketest.xml?testId=2967
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Answer: Identical … Symbol objects with same string are identical.
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Crap … for sure it it returned a new string. Important to notice is that formbody is not changed. gsub! In other hand will mutate the original string.
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While loop with a negated condition
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Recursion
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String.gsub
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Anything but false or nil
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Whenever a float is used, the result will be float, otherwise Truncation will happen
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Ruby sucks! There is no x++ x-- ++x –x as in Java and C
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Stat can be used to compare modification times.
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This will iterate over the tenths:
0.step(10,0.1) {|i| puts i}
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Procs in Ruby are drop in code snippets, not methods. Because of this, the Proc return is the proc_return method’s return, and acts accordingly. Lambdas however act just like methods, as they check the number of arguments and do not override the calling methods return.
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