Ruby - String in Backquotes

Introduction

A string enclosed by backquotes:`

` is the inward-pointing quote character that is in the top-left corner of the keyboard.

Ruby considers anything enclosed by back-quotes to be a command that can be passed for execution by the operating system.

Ruby provides more than one way of doing this.

It turns out %x/some command/ has the same effect as `somecommand` and so does %x{some command}.

On the Windows operating system, for example, each of the three lines shown next would pass the command dir to the operating system, causing a directory listing to be displayed:

Demo

puts(`dir main.rb`) 

puts(%x/dir main.rb/) #  ww w .jav  a2s  .  c  om
puts(%x{dir main.rb})

Result

Related Topic

• String
• String across multiple lines
• String Expressions
• String literal single quote vs double quote
• Using embedded evaluation in double-quoted strings
• Doing math in double-quoted string
• Call system command in double-quoted strings
• String in comma
• String indexed using negative values
• Record separator $/
• Modifying Receivers and Yielding New Objects

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