Concatenate string by string index


string = 'My first string'                   # => "My first string"

string[3].chr + string[4].chr + string[5].chr + string[6].chr +  string[7].chr

1.	Character literal
2.	Map chars in a string
3.	specify a Fixnum (integer) as an index, it returns the decimal character code for the character found at the index location
4.	Use string as array
5.	Change a string with offset
6.	taking the first letter from a string
7.	Accessing Strings
8.	If you add the chr method from the Integer class, you'll get the actual character:
9.	use an offset and length (two Fixnums) to tell [] the index location where you want to start, and then how many characters you want to retrieve
10.	Enter a range to grab a range of characters.
11.	use regular expressions
12.	Adding another argument, a Fixnum, returns that portion of the matched data, starting at 0 in this instance
13.	Loop through a string with while

Concatenate string by string index : char in string « String « Ruby