concept verbose mode in category ruby

This is an excerpt from Manning's book The Well-Grounded Rubyist, Third Edition. Login to get full access to this book.

Table 1.6. Commonly used Ruby command-line switches (view table figure)

Switch	Description	Example of usage
-c	Checks the syntax of a program file without executing the program	ruby -c c2f.rb
-w	Gives warning messages during program execution	ruby -w c2f.rb
-e	Executes the code provided in quotation marks on the command line	ruby -e 'puts "Code demo!"'
-l	Line mode: prints a newline after every line of output	ruby -le 'print "+ newline!"'
-rname	Requires the named feature	ruby –rprofile
-v	Shows Ruby version information and executes the program in verbose mode	ruby –v
--version	Shows Ruby version information	ruby –-version
-h	Shows information about all command-line switches for the interpreter	ruby –h