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Top Forums Shell Programming and Scripting Awk command to replace specific position characters. Post 302594660 by pinnacle on Wednesday 1st of February 2012 01:14:50 AM
Old 02-01-2012
Thanks Mirni and Chubler.

I got most of it except the following.

substr(s,1,f-1) --> line before the string that needs to be replaced

sprintf("%-*s", t-f+1, v) --> here "s" represents the entire line. t-f+1 lenght of string being replaced, v is the new string to be inserted. But where are we saying the start and end position to the sprintf function for the new string to be inserted. We are just passing the length of the new string wanted.

Here is where i need little more help. I looked at the sprint function man page but is not of much help.


substr(s,t+1) --> line after substring to be replaced.


And also we are not using any concatenate function to join various substrings. But in sql and other Datawarehouse tools we use concatenate function.

Appreciate your help on this.
 

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MB_STRCUT(3)								 1							      MB_STRCUT(3)

mb_strcut - Get part of string

SYNOPSIS
string mb_strcut (string $str, int $start, [int $length = NULL], [string $encoding = mb_internal_encoding()]) DESCRIPTION
mb_strcut(3) extracts a substring from a string similarly to mb_substr(3), but operates on bytes instead of characters. If the cut position happens to be between two bytes of a multi-byte character, the cut is performed starting from the first byte of that character. This is also the difference to the substr(3) function, which would simply cut the string between the bytes and thus result in a malformed byte sequence. PARAMETERS
o $str - The string being cut. o $start - Starting position in bytes. o $length - Length in bytes. If omitted or NULL is passed, extract all bytes to the end of the string. o $encoding -The $encoding parameter is the character encoding. If it is omitted, the internal character encoding value will be used. RETURN VALUES
mb_strcut(3) returns the portion of $str specified by the $start and $length parameters. SEE ALSO
mb_substr(3), mb_internal_encoding(3). PHP Documentation Group MB_STRCUT(3)
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