You can specify a sign to enclose a character string enclosed in “’” or “”” in percent notation. When you use “”” in a string, you don’t have to escape it.
#"""None a = %*TEST* p a #=> "TEST" # There is """ a = %*"TEST"* p a #=> "\"TEST\""
|%||Double quote string|
|%Q||Double quote string|
|%q||Single quote string|
In the character string, “+” and “*” can be applied and connected.
a = "ru" + "by" puts a #=> ruby
In addition, you can also use “«” when connecting at the end.
a = "ru" puts a << "by" #=> ruby
Although it is ***, an error occurs when concatenating different character codes (UTF-8 and SJIS, etc.). **
Addendum: For comparison of character strings, you can refer to the number of characters with the length and size methods.
Symbols are mainly defined by putting “:” before the character string. However, it is not necessary to enclose the character string with “””.
a = "ruby" b = :study p str.class #=> String p sym.class #=> Symbol
You can also generate symbols using the percent notation.
%s*test* #=> :test
How to generate a symbol from a string
a1 = "test" a2 = a1.to_sym # use the to_sym method p a2.class #=> Symbol
The created symbols refer to the same object ID if the character sequence is the same, In the case of a character string literal, the object ID changes because a new object is created each time even if the character sequence is the same.