From: moontoeki@... (Sung Moon)
Date: 2002-02-04T13:17:26+09:00
Subject: Re: range and modification

>From: Jeff 'japhy' Pinyan jeffp@crusoe.net 

>On Feb 4, Sung Moon said:
>
>>n[4..8].sort!  doesn't work(same for compact!, collect!)
>
>That's because
>
>  a = b[4..8]
>
>doesn't make a[0] through a[5] "aliases" to b[4] through b[8].
>
>  b = (0..19).to_a
>  a = b[4 .. 8]
>  a[0] = 99
>  puts b.join(" ")
>
>You'll see that b[4] is still 4, not 99.
>
>>Is there any elegant way to do this job?
>
>  n[4..8] = n[4..8].sort
>
>is my best suggestion.
>
It's so simple. I thouht in hard way.

>>2. It seems LAST line in text does not have \n or \r\n,
>>    (I used Wordpad for creating this text)
>>   so I can't use chop/chomp without losing last digit/character.
>
>Uh, you can use chomp() safely.
>
>  ["jeff\n", "japhy"].each{|str| puts "<#{ str.chomp }>"}
>  # <jeff> and <japhy>
>
["jeff\n", "japhy"].each{|str| puts "<#{ str.chomp.inspect }>"}
==>  <"jeff"> <"japhy">          It's OK
["jeff\n", "japhy"].each{|str| puts "<#{ str.chop.inspect }>"}
==> <"jeff"> <"japh">            It's not OK

["jeff\r\n", "japhy"].each{|str| puts "<#{ str.chomp.inspect }>"}
==>  <"jeff\r"> <"japhy">              It's not OK
["jeff\r\n", "japhy"].each{|str| puts "<#{ str.chop.inspect }>"}
==>  <"jeff"> <"japh">                      It's not OK

So, we can use chomp for the line ending with \n,
but we can not use either chop or chomp for line ending with \r\n.

sungjin moon