You want only certain pieces of a string.
To get a substring of a string, call its slice method, or use the array index operator (that is, call the  method). Either method accepts a Range describing which characters to retrieve, or two Fixnum arguments: the index at which to start, and the length of the substring to be extracted.
s = 'My kingdom for a string!' s. slice(3,7) # => "kingdom" s[3,7] # => "kingdom" s[0,3] # => "My " s[11, 5] # => "for a" s[11, 17] # => "for a string!"
To get the first portion of a string that matches a regular expression, pass the regular expression into slice or :
s[/.ing/] # => "king" s[/str.*/] # => "string!"
To access a specific byte of a string as a Fixnum, pass only one argument (the zerobased index of the character) into String#slice or  method. To access a specific byte as a single-character string, pass in its index and the number 1.
s.slice(3) # => 107 s # => 107 107.chr # => "k" s.slice(3,1) # => "k" s[3,1] # => "k"
To count from the end of the string instead of the beginning, use negative indexes:
s.slice(-7,3) # => "str" s[-7,6] # => "string"
If the length of your proposed substring exceeds the length of the string, slice or  will return the entire string after that point. This leads to a simple shortcut for getting the rightmost portion of a string:
s[15…s.length] # => "a string!"
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