From: Carlos <angus@...>
Date: 2002-11-29T00:36:25+09:00
Subject: Re: Strings and substrings

> str = "hello world"
> str[0]  # -> 104
> 
> What does 'str[0]' do?  Why does it print 104 instead of "h"?

104 is the ASCII code of 'h'.

> str[0..0] # -> "h"

The range provides start and ending positions. The substring between these
positions (inclusive) is returned. In this case: from position 0 to
position 0.

> str[0,1]  # -> "h"

Here, the first parameter is the starting position. The second the length
of the desired substring.

> Could someone explain to me what these do?  And why I get:
> 
> str[0,0] # -> ""

You asked for a substring starting at position 0 of length 0.