How to parse through a string in perl to extract certain value?

Question

I have following string

> show box detail
   2 boxes:
1) Box ID: 1
   IP:                  127.0.0.1
   Interface:           1/1
   Priority:            31
2) Box ID: 2
   IP:                  192.68.1.1
   Interface:           1/2
   Priority:            31

How to get BOX ID from above string in perl? The number of boxes here can vary . So based on the number of boxes "n", how to extract box Ids if the show box detail can go upto n nodes in the same format ?

ikegami · Accepted Answer · 2013-03-28 08:12:44Z

2

my @ids = $string =~ /Box ID: ([0-9]+)/g;

More restrictive:

my @ids = $string =~ /^[0-9]+\) Box ID: ([0-9]+)$/mg;

answered Mar 28, 2013 at 8:12

ikegami

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1 Comment

ikegami Over a year ago

The match operator in list context returns all captured strings. If /g is used, this means all captured string from all iterations. In short: it returns all the ids.

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