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Full Discussion: Incrementing in while loop
Top Forums Shell Programming and Scripting Incrementing in while loop Post 302324394 by cfajohnson on Wednesday 10th of June 2009 03:16:01 PM
Old 06-10-2009
Quote:
Originally Posted by vidyadhar85
you can get rid of few more lines

Who cares? Lines are cheap.

Avoiding redundancy and bloat is one thing; playing golf is best left for amusement.
Quote:
1)if your FIELD2,FIELD 3...FIELD5 are fixed
use the values directly in printf i mean no need to assign them to variable and use it

It is good programming practice to avoid hard-coded values.
Quote:
2)there is no need to assign $start to n

Variables should reflect their purpose. The start doesn't change; only the index changes. What if the start variable is needed later in the program?
Quote:
3)n=$(( $n + 1 )) is <===> n=$((n+1))

The spaces are for legibility.

While POSIX allows the omission of the dollar sign on a variable in arithmetic expansion, the original wording of that part of the spec was not clear, and some major shells (dash and the BSD sh) did not allow it.

Therefore, for portability, it is a good idea to use the dollar sign.
 

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COLORS(3)						   libbash colors Library Manual						 COLORS(3)

NAME
colors -- libbash library for setting tty colors. SYNOPSIS
colorSet <color> colorReset colorPrint [<indent>] <color> <text> colorPrintN [<indent>] <color> <text> DESCRIPTION
General colors is a collection of functions that make it very easy to put colored text on tty. The function list: colorSet Sets the color of the prints to the tty to COLOR colorReset Resets current tty color back to normal colorPrint Prints TEXT in the color COLOR indented by INDENT (without adding a newline) colorPrintN The same as colorPrint, but trailing newline is added Detailed interface description follows. Available colors: Green Red Yellow White The color parameter is non-case-sensitive (i.e. RED, red, ReD, and all the other forms are valid and are the same as Red). FUNCTIONS DESCRIPTIONS
colorSet <color> Sets the current printing color to color. colorReset Resets current tty color back to normal. colorPrint [<indent>] <color> Prints text using the color color indented by indent (without adding a newline). Parameters: <indent> The column to move to before start printing. This parameter is optional. If ommitted - start output from current cursor position. <color> The color to use. <color> The text to print. colorPrintN [<indent>] <color> The same as colorPrint, except a trailing newline is added. EXAMPLES
Printing a green 'Hello World' with a newline: Using colorSet: $ colorSet green $ echo 'Hello World' $ colorReset Using colorPrint: $ colorPrint 'Hello World'; echo Using colorPrintN: $ colorPrintN 'Hello World' AUTHORS
Hai Zaar <haizaar@haizaar.com> Gil Ran <gil@ran4.net> SEE ALSO
ldbash(1), libbash(1) Linux Epoch Linux
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