From: Tobias Reif <tobiasreif@...>
Date: 2001-09-01T17:44:05+09:00
Subject: [ruby-talk:20660] replacing items in arrays

Hi,

1.
why doesn't the second block work?

------------snip-------------

lines = [["item0-0","item1-0","item2-0"],["item0-1","item1-1","item2-1"]]

------------snip-------------

# works:
lines.each_index {|lines_index|
   line = lines[lines_index]
   line = line.each_index {|line_index|
     line[line_index] = '<td>' + line[line_index] + '</td>'
   }
}

------------snip-------------

# doesn't:
lines.each_index {|lines_index|
   line = lines[lines_index]
   line = line.each_index {|line_index|
     item = line[line_index]
     item = '<td>' + item + '</td>'
   }
}

------------snip-------------

print lines.inspect

2.
wouldn't it be nice to be able to just say:

Array#replace_each:
-----
an_array = ['one', 'two']

an_array.replace_each do |item|
  'number ' + item
end
-----
-> ['number one', 'number two']

Or did I overlook an equivalent?


Tobi
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Tobias Reif
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