I've assumed that you were viewing the file with "cat -v" and seeing each null character as ^@ . sdebasis is assuming two ascii characters ^ and @ .
Please clarify what is in the file:
Nulls should show as \0 by this method.
Hi Experts,
I have data coming in 4 columns and there are new line characters \n in between the data. I need to remove the new line characters in the middle of the row and keep the \n character at the end of the line.
File is comma (,) seperated.
Eg:
ID,Client ,SNo,Rank
37,Airtel \n... (8 Replies)
Hi All
Please help me to remove the first 2 character from the file name.
files are like this
$ ls
12aman file
13atul si
56rana se
I want to remove the first 2 char which are numbers.
I want the o/p like thus
aman file
atul si
rana se (8 Replies)
I am trying to remove the tab character from a file, which occurs on two places in every line. So far I have tried the following and most are from threads in this forum:
sed -i '' -e 's/ / /' file.dat
sed -i '' -e 's/*/ /' file.dat
sed -i '' -e 's/\t*/ /g' file.dat
sed -i '' -e 's/*//g'... (4 Replies)
Hello,
I need to remove ^L character from a file as below:
HELLO "I "
HELLO "I "
^L HELLO "I"
HELLO "I "
HELLO "I "
Please suggest.
Thanks !!
Please use next time code tags for your code and data (9 Replies)
Hi
When i used :set list in vi , i have seen a lot ^I characters in my file. Could anyone please help me how to remove this characters ?
Issue : When i used awk to combine two file (one of the file has ^I characters) then my output is different than what am expecting, one of column being... (2 Replies)
Good afternoon:
im working wih 2 files to find differences and use the cmp command
cmp file1 file2
file1 file2 are are diifferent char 302 line1
i found what the difference is with the sed command and that is the file1 at the end of every line has a (,) (comma) character.
i.e
sed -n... (4 Replies)
Hi All,
Could any one suggest how to remove $ symbol in a text file when i am opening in vi editor.
Scenario;
For example iam having a file name aaa.txt the data inside the file is like
sample
name
when i am opening in vi editor
The same file resembles like below when i am... (1 Reply)
I would like to delete a particular character (') in file.
I tried this command, but didn't work:
sed 's/'//g' file
My file contains these rows:
'eaa3b0e3f86b97a13f123302e1bc788f9':'FfdrTN\''
'ff368e9fb0982cf91237ef5456297bbb3':'jdcgr$x'
'5b829da203d0e53e49e632572bd9091a':']nzuerG'
... (4 Replies)
I have a file which comes every day and the file data look's as below.
Vi abc.txt
a|b|c|d\n
a|g|h|j\n
Some times we receive the file with only a new line character in the file like
vi abc.txt
\n (8 Replies)
Discussion started by: rak Kundra
8 Replies
LEARN ABOUT DEBIAN
tree::simple::visitor::postordertraversal
Tree::Simple::Visitor::PostOrderTraversal(3pm) User Contributed Perl Documentation Tree::Simple::Visitor::PostOrderTraversal(3pm)NAME
Tree::Simple::Visitor::PostOrderTraversal - A Visitor for post-order traversal a Tree::Simple hierarchy
SYNOPSIS
use Tree::Simple::Visitor::PostOrderTraversal;
# create an visitor
my $visitor = Tree::Simple::Visitor::PostOrderTraversal->new();
# pass our visitor to the tree
$tree->accept($visitor);
# print our results
print join ", " => $visitor->getResults();
# this will print this:
# 1.1.1 1.1 1.2 1 2.1 2 3.1 3
# assuming your tree is like this:
# 1
# 1.1
# 1.1.1
# 1.2
# 2
# 2.1
# 3
# 3.1
DESCRIPTION
Post-order traversal is a variation of the depth-first traversal in which the sub-tree's are processed before the parent. It is another
alternative to Tree::Simple's "traverse" method which implements a depth-first, pre-order traversal.
METHODS
new There are no arguments to the constructor the object will be in its default state. You can use the "setNodeFilter" method to customize
its behavior.
includeTrunk ($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 2005-07-14 Tree::Simple::Visitor::PostOrderTraversal(3pm)