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Full Discussion: Awk command to replace specific position characters.
Top Forums Shell Programming and Scripting Awk command to replace specific position characters. Post 302594644 by Chubler_XL on Tuesday 31st of January 2012 11:59:54 PM
Old 02-01-2012
Ill try and explain this first:

Code:
sprintf("%-*s", t-f+1, v) substr(s,t+1)
s=string
f=from
t=to
v=New value
 
t-f+1 = length of new string

sprintf will left justify New value to width of (t-f+1), padded with spaces.

So repl function returns:

(chars 1 => (FROM-1)) +
padded New value +
(chars (TO + 1) => end)

Note that function originally takes $0 (input line) and stores result in 'a'.
All other calls work on 'a' and store back into 'a' again.

1. a = orginal string replaced at chars 96-98
2. a = a (result from 1) replaced at chars 99-113
3. a = a (result from 2) replaced at chars 190-198

-------
Edit: Nice description Mirni - I was desk checking my description while you posted, but I think you explained it more clearly.
This User Gave Thanks to Chubler_XL For This Post:
Sandeep
 

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LEARN ABOUT PHP

udm_get_res_field

UDM_GET_RES_FIELD(3)							 1						      UDM_GET_RES_FIELD(3)

udm_get_res_field - Fetch a result field

SYNOPSIS

       string udm_get_res_field (resource  $res, int  $row, int  $field)

DESCRIPTION

	Fetch a mnoGoSearch result field.

PARAMETERS

	      o $res
		-$res - a link to result identifier, received after call to udm_find(3).

	      o $row
		-$row - the number of the link on the current page. May have values from 0 to $UDM_PARAM_NUM_ROWS-1.

	      o $field
		-$field - field identifier, may have the following values:

		     o UDM_FIELD_URL - document URL field

		     o UDM_FIELD_CONTENT - document Content-type field (for example, text/html).

		     o UDM_FIELD_CATEGORY  - document category field. Use udm_cat_path(3) to get full path to current category from the categories
		       tree root. (This parameter is available only in PHP 4.0.6 or later).

		     o UDM_FIELD_TITLE - document title field.

		     o UDM_FIELD_KEYWORDS - document keywords field (from META KEYWORDS tag).

		     o UDM_FIELD_DESC - document description field (from META DESCRIPTION tag).

		     o UDM_FIELD_TEXT - document body text (the first couple of lines to give an idea of what the document is about).

		     o UDM_FIELD_SIZE - document size.

		     o UDM_FIELD_URLID - unique URL ID of the link.

		     o UDM_FIELD_RATING - page rating (as calculated by mnoGoSearch).

		     o UDM_FIELD_MODIFIED - last-modified field in unixtime format.

		     o UDM_FIELD_ORDER - the number of the current document in set of found documents.

		     o UDM_FIELD_CRC - document CRC.

RETURN VALUES

       udm_get_res_field(3) returns result field value on success, FALSE on error.

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