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Use match() in nawk to find digits in number

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# 1  
Old 08-16-2011
Use match() in nawk to find digits in number
Hi,

I just need to check whether number of digits in a phone number is 10 or not. If I am not wrong regex will be: [1-9][0-9]{9}

I have to use this inside nawk as this is a small portion of a big program.

Code:
nawk '
BEGIN { RS="";FS=";";
regex="[1-9][0-9]{9}";
}
{
    for (i=1;i<=NF;i++) {
      if (match($i,regex))
         {print "matched"}
      else
         {print "not matched"}
    }
}
' input

input file contains:
Code:
5134704084;51347040845

Output should be
matched
not matched

but output is:
not matched
not matched

.....
Thanks.
# 2  
Old 08-16-2011
Afaik, nawk uses \{ and \} (this is not POSIX but traditional).
And you will need to use "\\{" and "\\}" in a string.
# 3  
Old 08-16-2011
@ yazu
As I told this is just a small portion of a large program and everything else is working fine inside nawk. I am using 'for', 'if' and other loops in the same nawk and it's working. so my guess is there is a mistake either in regex declaration syntax or regex itself..

thanks.
# 4  
Old 08-16-2011
Oh... I was about using braces in regex in nawk. Try:
Code:
regex="[1-9][0-9]\\{9\\}"

# 5  
Old 08-16-2011
nope, its giving wrong results again.
# 6  
Old 08-16-2011
Well... It just means that your version of nawk doesn't support interval expressions in regex at all.
You need
Code:
"^[1-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9]$"

# 7  
Old 08-16-2011
Thanks yazu, you were right. it worked now.

But there should be some way to do in older version as well, if we need to match 50 digits instead of 10, its irritating.

Anyways Thanks.
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