Hi,
I have file name (abcd001). I want to extract on the alphabets from this file name. I don't want the numeric part of it. Once i extract the alphabets the i can search for all those file. Could anyone help on this. Thanks in advance (2 Replies)
hello,
how can I filter and get the latest order number (last five digits) below:
input file:
johnmm00001
maryyy00121
johnm100222
johnmm00003
maryyy00122
output file:
johnmm00003
maryyy00122
johnm100222 (6 Replies)
Hi Guys,
Bit new to Unix shell scripting so this question might seems little kiddish for you.
what im trying to achieve here is :
I have file which is compressed like Account_52320090605076_log.Z
so in my shell script i call this file also as one of my parameters
like
... (4 Replies)
echo -n "read this also:"
read NewAuthor
if ]' ) ] ; then
echo "its a digit"
else
echo "something else"
fi
Hey guys , i am trying to do a search to check if the input is using alphabets and nothing else. I tried using ] and ] but none seems to work
When i use digit, it read 22.k... (5 Replies)
Hi,
I am trying to write a script that will take 2 or more instances of repetitive alphabets (ZZ) to be removed from a field. This should only happen from beginning and end of a field.
For Example :
Input File
a) ZZZIBM Corporation
b) ZZZIBM Corporation ZZZZZ
b) IBM ZZZ... (26 Replies)
dear all
about my last question
in fileA.txt (all list line i want to find in fileB.txt)
is content of line number
fileA.txt
23
34
35
55
59
and fileB.txt is content like
24:asd|ekkk|001|001
123:bca|egsd|210|002
1231:cas|egds|322|231
...
in fileB.txt they have line number like... (5 Replies)
Hi Friends,
I have a series of alphabets like this
AGCAA
The values inside the square brace indicate that either of them can be present at that position. And those ones without a brace, means that they are the only ones that could be printed at that location.
Now, I would like to know... (5 Replies)
Hi all, I have column 2 full of values like HIVE4A-56 and HIVE4-56. I want to convert all values like HIVE4A-56 to HIVE4-56.
So basically I want to delete all single alphabets before the '-' which is always preceded by a number. Values already in the desired format should remain unchanged... (4 Replies)
hi. I have a requirement where I need to REPLACE all alphabets from an alphanumeric input string into their respective ASCII decimal value. For example:
If the input string is ABAC123, the output should be 65666567123
I am seeking a single line command, and I was trying searching for options... (21 Replies)
Discussion started by: kumarjt
21 Replies
LEARN ABOUT DEBIAN
io::handle::prototype::fallback
IO::Handle::Prototype::Fallback(3pm) User Contributed Perl Documentation IO::Handle::Prototype::Fallback(3pm)NAME
IO::Handle::Prototype::Fallback - Create IO::Handle like objects using a set of callbacks.
SYNOPSIS
my $fh = IO::Handle::Prototype::Fallback->new(
getline => sub {
my $fh = shift;
...
},
);
DESCRIPTION
This class provides a way to define a filehandle based on callbacks.
Fallback implementations are provided to the extent possible based on the provided callbacks, for both writing and reading.
SPECIAL CALLBACKS
This class provides two additional methods on top of IO::Handle, designed to let you implement things with a minimal amount of baggage.
The fallback methods are all best implemented using these, though these can be implemented in terms of Perl's standard methods too.
However, to provide the most consistent semantics, it's better to do this:
IO::Handle::Prototype::Fallback->new(
__read => sub {
shift @array;
},
);
Than this:
IO::Handle::Prototype::Fallback->new(
getline => sub {
shift @array;
},
);
Because the fallback implementation of "getline" implements all of the extra crap you'd need to handle to have a fully featured
implementation.
__read
Return a chunk of data of any size (could use $/ or not, it depends on you, unlike "getline" which probably should respect the value of
$/).
This avoids the annoying "substr" stuff you need to do with "read".
__write $string
Write out a string.
This is like a simplified "print", which can disregard $, and "$" as well as multiple argument forms, and does not have the extra
"substr" annoyance of "write" or "syswrite".
WRAPPING
If you provide a single reading related callback ("__read", "getline" or "read") then your callback will be used to implement all of the
other reading primitives using a string buffer.
These implementations handle $/ in all forms ("undef", ref to number and string), all the funny calling conventions for "read", etc.
FALLBACKS
Any callback that can be defined purely in terms of other callbacks in a way will be added. For instance "getc" can be implemented in terms
of "read", "say" can be implemented in terms of "print", "print" can be implemented in terms of "write", "write" can be implemented in
terms of "print", etc.
None of these require special wrapping and will always be added if their dependencies are present.
GLOB OVERLOADING
When overloaded as a glob a tied handle will be returned. This allows you to use the handle in Perl's IO builtins. For instance:
my $line = <$fh>
will not call the "getline" method natively, but the tied interface arranges for that to happen.
perl v5.10.1 2009-09-29 IO::Handle::Prototype::Fallback(3pm)