Ruby/Number/Convert to String
Материал из Wiki.crossplatform.ru
constant value interpolation
number = 5 puts "The number is #{5}." # => "The number is 5."
Convert float to string
(256.0).to_s # => "256.0"
Convert integer to string by parameter
42.to_s(10) # => "42" -100.to_s(2) # => "-1100100" 255.to_s(16) # => "ff" 1442151747.to_s(36) # => "number"
Convert string to integer with error
"6".to_i(2) # => 0 "0".to_i(1) # ArgumentError: illegal radix 1 40.to_s(37) # ArgumentError: illegal radix 37
Integer passed into a string with interpolation
x = 2 print "This application is running okay if 2 + 2 = #{x + x}"
String interpolation with calculation
number = 5 puts "The number prior to #{number} is #{number-1}."
String interpolation with method call
number = 5 puts "The number after #{number} is #{number.next}."
Substituting Variables Into Strings
number = 5 "The number is #{number}." # => "The number is 5."
