Substract numeric from a string.

[Hon Seng Phuah]

Hi all,

I have a problem and have someone can help me.

I want to substract a numerica from a string.

For example:

A string is:
$line = RVW-30 {

I want to get 30 and store it into the $search_result.

I have code written as:

$search_result = ($line =~ /[-]([\d]+)/

I get this error message:

Use of uninitialized value at test.pl.

Any idea how to solve my problem. Thanks.

 

[Joe Smith]

A string is:
$line = RVW-30 {

I want to get 30 and store it into the $search_result.

I have code written as:

$search_result = ($line =~ /[-]([\d]+)/

I get this error message:

Use of uninitialized value at test.pl.

$input = '$line = RVW-30 {';
($search_result) = $input =~ /-(\d+)/;
print $search_result,"\n";

-Joe

 

[Hon Seng Phuah]

A string is:
$line = RVW-30 {

I want to get 30 and store it into the $search_result.

I have code written as:

$search_result = ($line =~ /[-]([\d]+)/

I get this error message:

Use of uninitialized value at test.pl.

$input = '$line = RVW-30 {';
($search_result) = $input =~ /-(\d+)/;
print $search_result,"\n";

-Joe

Thank Joe for your suggestion. Although it works for RVW-30, it does
not work for RVW-3 and RVW-4. It gives me this error message:

Argument "" isn't numeric in lt at test.pl

Any idea how to solve it? Thanks.
-HS Phuah

 

[Joe Smith]

Thank Joe for your suggestion. Although it works for RVW-30, it does
not work for RVW-3 and RVW-4.

The code I posted works perfectly find with "RVW-3" and "RVW-4".

It gives me this error message:
Argument "" isn't numeric in lt at test.pl

The code I posted does not have any "<" or "lt" operators.
You've obviously changed something.
We cannot debug your code without seeing it.
Make sure you copy-and-paste your code; do not retype by hand.
-Joe

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