Ruby on Rails Tutorial Fourth of the Ruby strings behind rails

1. Auxiliary methods

2. String

Enter "IRB" into the ruby command-line development environment, and the controller starts by executing "rails console" on the command line.

(1) String connection

>>"foo"+"bar"="foobar" 

(2) Interpolation by special syntax #{}

>>first_name="Amy" ="Amy">>"  #{first_name} Sun"+"Amy Sun "

(3) The difference between a single-quote string and a double-quote string: Single-quote strings they really are literal values, contain only the input characters, do not contain escape characters, and so on.

>>'\ n'and '\\n '

Ruby on Rails Tutorial Fourth of the Ruby strings behind rails