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I know that when using 'while (<FILE>) {}', Perl reads only one line of the file at one time, and store it in '$_'.

Can I change some parameters so that 'while (<>) {}' can read more than one...

Suppose there are two arrays of arrays:

@A = ( [A, 1], [B, 3], [C, 4], [D, 6] );
@B = ( [A, 2], [B, 5], [C, 3], [A, 3], [E, 7] );

For each of $A[0][0], $A[1][0], $A[2][0]..., I want to find...

What about the second order:
qw(a1 a2 a12 b2 b4 b22 cd1 ef hij);
Thanks!

Thanks! It works for the first order.

I've done a quick Google about this, but could not find the answer I want.

Say, there is an array like this:
@A = qw(cd1 a1 ef a2 hij a12 b2 b4 b22);

I want to sort the array in the first...

Most are scientific programming and text processing.

Thanks for your suggestion! I just bought C Programming Language 2nd ed. (Prentice Hall), do you think that should be enough? I am just wondering if I also need to get a reference book. By the way I...

Hi All,

Which one do you think is better as the C reference book: C in a Nutshell (O'Reilly, 2005) or C Primer Plus 5th ed. (Sams, 2004)?

I knew both of them should be great, but I certainly...

Thanks! I tried 'grep' like this before, but it will also give you those strings '******' after the name 'AB_21423'. Is there a way I can only store the name? Many thanks!

I know how to do this in perl, but I want to do it in bash script. Hope some one could help me, many thanks!

I have a file looks like this:

AB_21423 *********
BC_123 *********...

No, it is not. But I finally figure out I can use "goto" instead of "redo" just now.
Thanks for help!

Sorry I should make this more clear. Thanks to era and KevinADC for help.

The question I tried to solve equals to:
Randomly divide a 5500 feet rope into 10 pieces, and the length of every piece...

I knew this would not work because of problem with "redo". Is there a way to fix this? Thanks a lot!


my @n = (10..100);
my $i;
my $j = 0;
my $k;

LINE1: for ($i; $i < 10; $i++) {
$k =...

Thanks a lot!

Could any one tell how can I generate random number from (0, 100..200) in perl?

Thanks!

Could you give more details? Thanks!

Sorry, I should make my question more clear. So here is an example.

AAA
BBBBBBBBBB
CCCCCCCCCC
DDDDDDDDD
EEEEEEEEEEE

The file contains five lines, one way to process this by using while (<>)...

Could any one tell me how to read and match multiple lines in perl? Did this code below still work in this situation?

while (<FILE>) {
if (/ /) {
}
}

Thanks a lot!

Problem solved! Thanks so much!

Thanks! This certainly works, but you have to type every time. So there is probably a way you do not need to type while can finish this?

Thanks a lot!

I tried this method before, but how could I do if I want to change a file among *.txt to *.exe (keep the first part while change the second part)?

Thanks!

Just one question for bash shell script.
In bash script, you can use *.txt to call any files in current folder that ends with .txt, like
rm *.txt
will remove all txt file in current folder.

My...