Implicit Conversion

ruby-talk
1

Hello all,
I'm new to this site I'm an intern at software company and was given the
task of writing a program in ruby that simply could open data files
check for a particular field in the text file and compare the intger
agains't a mininum value.

I seem to be getting a prblem from ruby that says
" `[]': no implicit conversion from nil to integer (TypeError)"

Ruby doesn't seem to let me give integer values to an array inside a
loop.
Is there anyway I can static cast or do a type conversion in ruby ?

···

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2

Demetirck Demetrickn wrote:

I seem to be getting a prblem from ruby that says
" `': no implicit conversion from nil to integer (TypeError)"

Ruby doesn't seem to let me give integer values to an array inside a
loop.

That error doesn't happen when you give an integer, it happens when you give
nil. array[1] works, array[nil] does not. So likely you have a variable that
is nil or a method that returns nil, while you expect it to return an integer.
(For example Regex#=~ returns nil if the regex does not match. So if you use
the return value from =~, you'll have to check that it's not nil before using
it in ).

HTH,
Sebastian

···

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ICQ: 205544826

3

It doesn't sound like your error is necessarily what you think it is. That
error happens when you do something like:
  a = [1, 2, 3, 4, 5]
  i = nil
  a[i]

You can convert most objects (including nil) to an integer with the to_i
method, but that probably isn't going to fix anything. nil.to_i is always 0.

Post some code and someone here will likely be able to spot your error.

···

On Wed, Nov 19, 2008 at 12:35 PM, Demetirck Demetrickn <demetrickn@hotmail.com> wrote:

Hello all,
I'm new to this site I'm an intern at software company and was given the
task of writing a program in ruby that simply could open data files
check for a particular field in the text file and compare the intger
agains't a mininum value.

I seem to be getting a prblem from ruby that says
" `': no implicit conversion from nil to integer (TypeError)"

Ruby doesn't seem to let me give integer values to an array inside a
loop.
Is there anyway I can static cast or do a type conversion in ruby ?
--
Posted via http://www.ruby-forum.com/\.