my shell script is simple arithmetic process.my addtion,substract and divide all can be worked only except multiplication.please help me.the shell is following:
#!/usr/bin/sh
echo "enter a number1:"
read number1
echo "enter an operator:"
read operator
echo "enter a number2:"
read number2... (4 Replies)
hi all,
in ksh, is there a way to throw a generic error message. i have lots of commands in my script and i didnt want to put
if ; then
doStuff();
else
print "an error occured, please run script again";
fi
around all the commands used. is there a way detect a command has... (1 Reply)
Suppose i have a file A
1*2*3*4
2*4*4*22
and second file B
2*3*4*5
4*4*6*7
By multiplying file A by file B that is file A by first column in file B respectively
output shud be
2*6*12*20
8*16*24*154
my code is
=$1
next
}
{for (f=1;f<=NF;f++) (2 Replies)
I want to count the number of lines in a file and store it in a variable if this count is zero i hv to throw an error ...is this syntax correct , but i am not getting the desired result
I am not using -s option here as i am concerned about record count not the size
#!/bin/ksh
set $count1... (4 Replies)
Hi,
I wanted to write a schell program that fetches the values from a file and prints the output as its onerall multiplication.
for example I have a file named abc. it has values 2, 3, 4
now my program should give me 2*3*4 ie 24.
note:this file abc can have any numbers.
so experts,... (9 Replies)
Hi I have script that is developed to serch for 30 days old Directory & Files and then remove them ...
when i run it successfully removes the Directory & files & but it throw errors on the screen
..
..
+ find . -type f -mtime +30 -exec rm -f {} ;
+ exit
please help me ??
I... (0 Replies)
#!/bin/sh
echo Enter the multiplication number required:
read number
for i in 1 2 3 4 5 6 7 8 9 10
do
echo "$number * $i = expr $number \* $i"
done
I am not getting the output for this multiplication table. (4 Replies)
Hi,
I have a requirement like i have to search a script and find names that conatins more than two dots, if so then throw error.
For ex: a1.b1.comname here i have to find comname and check two dots. it will not throw error
a1.b1.c1.comname here it contains more than 2dots it will throw... (3 Replies)
Hi,
I have two files (file1.txt, file2.txt) in which, I would like to multiply all the values in file1 with the first row value of file2, file1 * second row value of file2, file1 * third row value of file2 and so on.
Below are my sample data.
file1.txt file2.txt ... (6 Replies)
Hello,
I am trying to compute the percentage in a script as shown below:
PerCover=`echo "scale=2 ; 100 \* ($InputCover/$Total)" | bc`
However the PerCover value is blank/null. What do I need to do differently?
Thanks for your input!
~Guss (1 Reply)
Discussion started by: Gussifinknottle
1 Replies
LEARN ABOUT DEBIAN
tree::simple::visitor::preordertraversal
Tree::Simple::Visitor::PreOrderTraversal(3pm) User Contributed Perl Documentation Tree::Simple::Visitor::PreOrderTraversal(3pm)NAME
Tree::Simple::Visitor::PreOrderTraversal - A Visitor for pre-order traversal a Tree::Simple hierarchy
SYNOPSIS
use Tree::Simple::Visitor::PreOrderTraversal;
# create an visitor
my $visitor = Tree::Simple::Visitor::PreOrderTraversal->new();
# pass our visitor to the tree
$tree->accept($visitor);
# print our results
print join ", " => $visitor->getResults();
# this will print this:
# 1 1.1 1.1.1 1.2 2 2.1 3 3.1
# assuming your tree is like this:
# 1
# 1.1
# 1.1.1
# 1.2
# 2
# 2.1
# 3
# 3.1
DESCRIPTION
Pre-order traversal is a depth-first traversal method in which the sub-tree's are processed after the parent. It is essentially a wrapper
around the base Tree::Simple::Visitor class, and is a separate module here for completeness. (If you have a post-order, you should have a
pre-order too).
METHODS
new There are no arguments to the constructor the object will be in its default state. You can use the "setNodeFilter" method to customize
its behavior.
includeTrunk ($boolean)
Based upon the value of $boolean, this will tell the visitor to include the trunk of the tree in the traversal as well.
setNodeFilter ($filter_function)
This method accepts a CODE reference as its $filter_function argument and throws an exception if it is not a code reference. This code
reference is used to filter the tree nodes as they are collected. This can be used to customize output, or to gather specific
information from a more complex tree node. The filter function should accept a single argument, which is the current Tree::Simple
object.
visit ($tree)
This is the method that is used by Tree::Simple's "accept" method. It can also be used on its own, it requires the $tree argument to be
a Tree::Simple object (or derived from a Tree::Simple object), and will throw and exception otherwise.
getResults
This method returns the accumulated results of the application of the node filter to the tree.
BUGS
None that I am aware of. Of course, if you find a bug, let me know, and I will be sure to fix it.
CODE COVERAGE
See the CODE COVERAGE section in Tree::Simple::VisitorFactory for more inforamtion.
SEE ALSO
These Visitor classes are all subclasses of Tree::Simple::Visitor, which can be found in the Tree::Simple module, you should refer to that
module for more information.
AUTHOR
stevan little, <stevan@iinteractive.com>
COPYRIGHT AND LICENSE
Copyright 2004, 2005 by Infinity Interactive, Inc.
<http://www.iinteractive.com>
This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
perl v5.10.1 2010-02-18 Tree::Simple::Visitor::PreOrderTraversal(3pm)