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Full Discussion: Converting String To Integer/Float (weird case)
Top Forums Shell Programming and Scripting Converting String To Integer/Float (weird case) Post 302989255 by sekfarok on Tuesday 10th of January 2017 10:32:39 AM
Old 01-10-2017
ahh sorry.

Currently (ignore the position). Let say i have a few records with 15 character long (fixed length).

Input
Code:
T00001000000234
T0000200000-123     <-- this should become -123
T00003000000234
T00004000000234
T00005000-11234     <-- this should become -11234
T00006000000234
T00007000000234


the var1 should be something like: var1=substr($0,7,9)

and record 2 and 5 are having '-' sign but in different position. Hope this is enough sample.
Last edited by vgersh99; 01-10-2017 at 11:34 AM.. Reason: code tags, please!
 

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LEARN ABOUT PLAN9

dd

DD(1)							      General Commands Manual							     DD(1)

NAME

       dd - convert and copy a file

SYNOPSIS

       dd [ option value ] ...

DESCRIPTION

       Dd  copies  the specified input file to the specified output with possible conversions.	The standard input and output are used by default.
       The input and output block size may be specified to take advantage of raw physical I/O.	The options are

       -if f   Open file f for input.

       -of f   Open file f for output.

       -ibs n  Set input block size to n bytes (default 512).

       -obs n  Set output block size (default 512).

       -bs n   Set both input and output block size, superseding ibs and obs.  If no conversion  is  specified,  preserve  the	input  block  size
	       instead of packing short blocks into the output buffer.	This is particularly efficient since no in-core copy need be done.

       -cbs n  Set conversion buffer size.

       -skip n Skip n input records before copying.

       -iseek n
	       Seek n records forward on input file before copying.

       -files n
	       Catenate n input files (useful only for magnetic tape or similar input device).

       -oseek n
	       Seek n records from beginning of output file before copying.

       -count n
	       Copy only n input records.

       -conv ascii    Convert EBCDIC to ASCII.

	    ebcdic   Convert ASCII to EBCDIC.

	    ibm      Like ebcdic but with a slightly different character map.

	    block    Convert variable length ASCII records to fixed length.

	    unblock  Convert fixed length ASCII records to variable length.

	    lcase    Map alphabetics to lower case.

	    ucase    Map alphabetics to upper case.

	    swab     Swap every pair of bytes.

	    noerror  Do not stop processing on an error.

	    sync     Pad every input record to ibs bytes.

       Where  sizes are specified, a number of bytes is expected.  A number may end with or to specify multiplication by 1024 or 512 respectively;
       a pair of numbers may be separated by to indicate a product.  Multiple conversions may be specified in the style:

       is used only if or conversion is specified.  In the first two cases, n characters are copied into  the  conversion  buffer,  any  specified
       character  mapping  is  done, trailing blanks are trimmed and new-line is added before sending the line to the output.  In the latter three
       cases, characters are read into the conversion buffer and blanks are added to make up an output record of size n.   If  is  unspecified	or
       zero,  the  and	options  convert the character set without changing the block structure of the input file; the and options become a simple
       file copy.

SOURCE

       /sys/src/cmd/dd.c

SEE ALSO

       cp(1)

DIAGNOSTICS

       Dd reports the number of full + partial input and output blocks handled.

																	     DD(1)
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