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.
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
I have,
LIST="a b c d e"
for word in $LIST
do
echo $word
done
would give me
a
b
c
d
e
With the first iteration of the for loop, I get "a" as the result.
Is it possible that I get both "a" and "b" in only the first iteration.
In the next iteration I get "c" and "d" and so on.... (2 Replies)
Discussion started by: run_time_error
2 Replies
2. Shell Programming and Scripting
Another question, is it possible to, in a for-loop incrementing until it reaches a certain number, to have it loop again without incrementing? Just have it drop what it is doing when it reaches this command and start again at the same number it was at? I know I could make a while loop and just... (0 Replies)
Discussion started by: jeriryan87
0 Replies
3. Post Here to Contact Site Administrators and Moderators
Hi Admin, i just noticed that when I do postings, the number does not increment. eg :
Post A -Total Posts 312
Post B - Total Posts 312
Post C - Total Posts 313
Post D - Total Posts 313
Why is this so? Can you kindly check this out? Thank you. (5 Replies)
Discussion started by: incredible
5 Replies
4. Shell Programming and Scripting
I need to execute a KornShell (SunOS 5.9) script against a range of dates:
endDate=20080804
extractDate=20080401
while ; do
batch < scripts/myshellscript.sh $extractDate
## add 1 day to extractDate ##
done
My question is how do I increment the extractDate variable and still have it... (3 Replies)
Discussion started by: Robert W.Mills
3 Replies
5. Shell Programming and Scripting
Hi All,
Iam trying to increment a variable
Following is the code
#!/usr/bin/ksh
i=1;
i='expr $i+1';
echo $i;
Output:
expr $i+1
not able to understand why its happening in that way
i was expecting result as 2... if the above method is worng .. can you help how i can get... (3 Replies)
Discussion started by: kiranlalka
3 Replies
6. Programming
Hello,
what is the result of the below, and how does it work?
int i = 5;
cout << i++ * ++i << endl;
cout << i << endl; (12 Replies)
Discussion started by: milhan
12 Replies
7. Homework & Coursework Questions
1. The problem statement, all variables and given/known data:
Variable is resetting to 0 after incrementing in while loop
My bit of scripting displays the current users logged in the machine.
Then it reads in a specific username and displays the processes for that user.
The portion that I... (3 Replies)
Discussion started by: ratzlaff
3 Replies
8. Shell Programming and Scripting
I'm currently trying to write a ksh or csh script that would change the name of a file found in directories and attach to the name an incrementing three digit number.
I know how to write a script that will go:
000, 001, 002, 003, etc
The twist is I need more increments then allowed by a 3... (11 Replies)
Discussion started by: Rust
11 Replies
9. UNIX for Dummies Questions & Answers
Hi,
want to increment a variable in a for loop like this:
for (( c=$total-1; c>=0; c-- ))
do
if ;
then
maximo=$valores
fi
done
But it gives the error:
No such file or directory
How can i do this only incrementing the c variable?
Thanks (8 Replies)
Discussion started by: limadario
8 Replies
10. UNIX for Dummies Questions & Answers
I have a date variable like 2012-12-31 ( YYYY -MM -DD ) in flat file and it has to be incremtented by 1 every time i run the script
Example : i tried the below script after data modifcation but this does not seem to work
expr `20121231 +%Y%m%d` + 1
Note : Mine is not a GNU... (4 Replies)
Discussion started by: akshay01987
4 Replies
LEARN ABOUT DEBIAN
colorset
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