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Top Forums Shell Programming and Scripting How to convert a column to last five digits Post 302357854 by rdcwayx on Wednesday 30th of September 2009 09:02:18 PM
Old 09-30-2009
Quote:
Originally Posted by grossgermany
wow dan, that's amazing, would you mind explain a bit on how this works?
what is the ? symbol do?
what is the ($2~/-/) do?
what is the }1 in the end do?
It likes to use "if else" in awk, but shorter.

Code:
awk '{if ($2~/-/) {print $1 substr($2,length($2)-9)} else {print $1 substr($2,length($2)-4)}}' urfile

 

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ICONV_SUBSTR(3) 							 1							   ICONV_SUBSTR(3)

iconv_substr - Cut out part of a string

SYNOPSIS
string iconv_substr (string $str, int $offset, [int $length = iconv_strlen($str, $charset)], [string $charset = ini_get("iconv.inter- nal_encoding")]) DESCRIPTION
Cuts a portion of $str specified by the $offset and $length parameters. PARAMETERS
o $str - The original string. o $offset - If $offset is non-negative, iconv_substr(3) cuts the portion out of $str beginning at $offset'th character, counting from zero. If $offset is negative, iconv_substr(3) cuts out the portion beginning at the position, $offset characters away from the end of $str. o $length - If $length is given and is positive, the return value will contain at most $length characters of the portion that begins at $offset (depending on the length of $string). If negative $length is passed, iconv_substr(3) cuts the portion out of $str from the $offset'th character up to the character that is $length characters away from the end of the string. In case $offset is also negative, the start position is calculated beforehand according to the rule explained above. o $charset - If $charset parameter is omitted, $string are assumed to be encoded in iconv.internal_encoding. Note that $offset and $length parameters are always deemed to represent offsets that are calculated on the basis of the character set determined by $charset, whilst the counterpart substr(3) always takes these for byte offsets. RETURN VALUES
Returns the portion of $str specified by the $offset and $length parameters. If $str is shorter than $offset characters long, FALSE will be returned. SEE ALSO
substr(3), mb_substr(3), mb_strcut(3). PHP Documentation Group ICONV_SUBSTR(3)
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