Re: Re: trying to learn

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On Fri, 3 Sep 2004, Abhijit Menon-Sen wrote:

> At 2004-09-03 12:15:25 +0545, [email protected] wrote:
>>
>> In the for loop I want my new array name to be assigned at runtime
>> like @line1, @line2 and so..
>
> Whenever you find yourself wanting to name variables "@line1, @line2 and
> so on", step back and ask yourself why you aren't using an array, which
> gives you variables "named" $line[1], $line[2], and so on.
>

$line[1] would refer to a single scalar variable which is the second
element of array @line.
Since,
@line = <STDIN>;
would contain 3 elements if the following would be what I typed.
23 34 6545 32 2543 "Enter Key" # The first enter key
76 354 394875 9834 "Enter Key" # The second enter key
435 567 876 345 587 "Enter Key" # The third enter key
CTRL + D # Finish the input.


What I understand is that at this point @line would be having three
elements each with a new line character at the end.

>> @numbers = <STDIN>;
>>
>> @all_lines = split(/\n/, @numbers);
>
Since I don't know how many lines of input can be there in the array,
how will i break/split them and move to other arrays. That's why I was
thinking of a way of dynamic array naming :-)
But as you say,, I've already mistaken.

> This is wrong.
>
> For starters, split works on strings, not numbers. Your @numbers already
> contains what you want to put in @all_lines. But, apart from that, since
> you want to operate on each line separately, why not do so directly?
>
> $i = 0;
> $total = 0;
> @lines = ();
>
> while ( $numbers = <STDIN> ) {
>    # $sum = sum of the numbers in $numbers
>
>    $lines[$i++] = $sum;
>    $total += $sum;
> }
>
> To find the sum of one line, you will need to use split / /.
>
> -- ams
>
The above code looks really what I wanted. But i might have to add a
check on $numbers to see if the user input just a single number or
multiple numbers separated by spaces.. Right ????

rrs

- -- 
Ritesh Raj Sarraf
RESEARCHUT -- http://www.researchut.com
Gnupg Key ID: 04F130BC
"Stealing logic from one person is plagiarism, stealing from many is research".
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