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Top Forums Shell Programming and Scripting Shell Printf command , a little more dynamic.. Post 302765993 by kumarjt on Monday 4th of February 2013 03:37:38 AM
Old 02-04-2013
Shell Printf command , a little more dynamic..

A big hello to everyone tagged to this site of knowledge . This is the first post of mine and I am looking forward to an enjoyable stint in this forum where I get to know a lot of new ideas and share whatever knowledge (its not much though Smilie ) I have acquired throughout my career so far with y'all.

To start of , I am , in a sort of stuck in a strange situation.
The requirement is to format a string to a precision , which is will be dynamic .

Lets say the string's 976461 , and we have to format it to a precision of 10 , and LEFT PAD it with zero's. So the output would be 0000976461 .

What I did is to store the precision in a Shell variable (say a ) using the following code :
Code:
a=10

and the string in another Shell variable b using :
Code:
b=976461

and use the printf command to format the string to the precision stored in variable a , and finally write the output to variable c using
Code:
c=` printf "%0'$a'd" $b`

Now , when I echo the value of c, it showing 000976,461.

Can anyone help me with this ?

Thanks
Kumarjit.

Last edited by Scrutinizer; 02-04-2013 at 05:02 AM.. Reason: code tags
 

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Types(3)						User Contributed Perl Documentation						  Types(3)

NAME
Mac::Types - Macintosh Toolbox Types and conversions. DESCRIPTION
Access to Inside Macintosh is essential for proper use of these functions. Explanations of terms, processes and procedures are provided there. Any attempt to use these functions without guidance can cause severe errors in your machine, including corruption of data. You have been warned. Functions MacPack [ CONVERTERS ...] CODE, DATA ... Convert a perl value into a Mac toolbox type. Predefined codes are: TEXT Text (an identity operation). enum type keyw A 4-byte string. bool A boolean. shor A short integer. long A long integer. sing A single precision float. doub A double precision float. magn An unsigned long. qdrt A QuickDraw "Rect". 'STR ' A pascal style string. 'STR#' A string list. 'fss ' A file specification record. You can pass further code mappings as hash references. MacUnpack [ CONVERTERS ...] CODE, DATA Convert a Mac toolbox type into a perl value. Predefined codes are as for "MacPack". You can pass further code mappings as hash references. XS Functions Debugger [ MSG ] Break into MacsBug. Don't use this if you don't know what MacsBug is. AUTHOR
Written by Matthias Ulrich Neeracher <neeracher@mac.com>. Currently maintained by Chris Nandor <pudge@pobox.com>. perl v5.18.2 2017-10-06 Types(3)
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