Apparently your sed doesn't understand the [[:digit:]] class, but if it did, it would replace the first digit -- the 1 in 1989 -- and replace it with a literal string "[[:digit:]]". You need to supply more context; and, apparently, use the old-fashioned [0-9] construct for matching a digit.
The regular expression matches a single digit after an underscore, and captures it into a backreference so you can refer to it as "\1" in the substitution part. (That's what the backslashed parentheses are for. Your sed might want them without backslashes, or something.) The /g at the end says to do this as many times as possible ("globally"), not just on the first occurrence.
I found below script to check whether the variable is a digit in ksh.
############################
#!/bin/ksh
REPLY="3f"
if ]*\)'` != ${REPLY} && "${REPLY}" != "0" ]]
then
print "is digit\n"
else
print "not digit\n"
fi
############################
Although it works fine, but... (6 Replies)
Hi All,
How can i convert a number 24 to 0024
In the same way how can i convert 123 to 0123?
All this has to be done inside a script
Thanks in advance
JS (6 Replies)
I have a var storing date
var=`date`
Now the date is returned as
Mon Feb 2 00:25:48 PST 2009
Is there any way to check the date field alone ("2" in above case) and if its a single digit then add a prefix 0 to it and store the result in same variable "var"
My intention in above case is... (3 Replies)
Hi,
I have a text file with content as follows:
bla foo3200492
comment on this: 3900302
here comes the teddy 12
all I need is:
3200492
3900302
12
So I need the correct "sed" command to delete everything until the first number.
I am not a regex expert, because I have to... (3 Replies)
hi All,
i want to add the single digit front of the line in the report file and string compare with pattern file.
patter file: pattern1.txt
pattern num
like 4
love 3
john 2
report file: report.txt
i like very much
but john is good boy
i will love u
so after execute... (9 Replies)
Hi,
I am trying to create a csv from a existing flat file.I am using the same data to create the csv file. But I have issues \10 columns onwards..
sed... (5 Replies)
Hello!
My final exam in my Linux class is tomorrow, and I was just reviewing the grep and sed commands. I came across an example, by which I got stumped: it asks to provide a sed command that deletes all lines that contain exactly 3 to 5 digit strings, from a file.
In this case, I created a... (3 Replies)
Like I have below string
XX_49154534_491553_201_122023_D
XX_49159042_491738_201_103901_D
and the expected output would be
0154534
0159042
XX and 49 can be dynamic. (1 Reply)
Discussion started by: nadeemrafikhan
1 Replies
LEARN ABOUT DEBIAN
algorithm::checkdigits::mxx_004
CheckDigits::MXX_004(3pm) User Contributed Perl Documentation CheckDigits::MXX_004(3pm)NAME
CheckDigits::MXX_004 - compute check digits for VAT RN (AT)
SYNOPSIS
use Algorithm::CheckDigits;
$vat = CheckDigits('ustid_at');
if ($vat->is_valid('U13585627')) {
# do something
}
$cn = $vat->complete('U1358562');
# $cn = 'U13585627'
$cd = $vat->checkdigit('U13585627');
# $cd = '7'
$bn = $vat->basenumber('U13585627');
# $bn = 'U1358562'
DESCRIPTION
ALGORITHM
1. Beginning right all numbers before the check digit are weighted alternatively 1 and 2.
2. The total of the digits of all products is computed and then subtracted from 96.
3. The check digit is the sum of step 3 taken modulo 10.
METHODS
is_valid($number)
Returns true only if $number consists solely of numbers and the last digit is a valid check digit according to the algorithm given
above.
Returns false otherwise,
complete($number)
The check digit for $number is computed and concatenated to the end of $number.
Returns the complete number with check digit or '' if $number does not consist solely of digits and spaces.
basenumber($number)
Returns the basenumber of $number if $number has a valid check digit.
Return '' otherwise.
checkdigit($number)
Returns the checkdigit of $number if $number has a valid check digit.
Return '' otherwise.
EXPORT
None by default.
AUTHOR
Mathias Weidner, <mathias@weidner.in-bad-schmiedeberg.de>
SEE ALSO
perl, CheckDigits, www.pruefziffernberechnung.de.
perl v5.10.0 2008-05-17 CheckDigits::MXX_004(3pm)