Old-school teachers tend to recommend something like this (I prefer this for it's simple enough and practically works quite well):
and replace all your floating-point == with equal(). This is one method.
Perl Cookbook gives you another method, using sprintf() to convert both operands to compare to fixed number of decimal places before comparing them, stringwise (using eq instead of ==).
Hi,
I have thousands of files in a directory that have the following 2 formats:
289620178.aln
289620179.aln
289620180.aln
289620183.aln
289620184.aln
289620185.aln
289620186.aln
289620187.aln
289620188.aln
289620189.aln
289620190.aln
289620192.aln....
and:
alnCDS_1.fasta (1 Reply)
Hi,
The task i have to do is to
1- create a database contains the Names .run the query and store results in hash make the Name field is the hash key
2- in the same time i have a txt which i will loop through it word by word and check for each word if a hash key ( compare it with the Names in... (0 Replies)
Hi Perl Gurus , need URGENT HELP PLEASE !!!!!
I have one recursive Perl function which takes path of any directory as argument and returns array containing all the sub folders inside it recursively.
Now the problem is that it works well if i use it with one time but the problem is that when... (0 Replies)
I am facing a problem in replacing the file contents by iterating through the list.
My present code:
Code:
#!/bin/bash#
TFILE="/tmp/vinay/testb_1.txt"
while read linedo
aline="$line"
echo $aline
code=`echo $aline|cut -d ',' -f1`
country=`echo $aline|cut -d... (5 Replies)
Hello All,
Im a Hardware engineer, I have written this script to automate my job. I got stuck in the following location.
CODE:
..
..
...
foreach $key(keys %arr_hash) {
my ($loc,$ind,$add) = split /,/, $arr_hash{$key};
&create_verilog($key, $loc, $ind ,$add);
}
sub create_verilog{... (2 Replies)
hi all,
i am writing a ksh script, i am logging into an oracle db via sqlplus and running a select statement but i dont know how i can store the results from the sql so i can iterate over it and do more operations over it. I dont want to write a stored procedure with a cursor since i need to... (2 Replies)
Hi,
I have an hashes of hash, where hash is dynamic, it can be n number of hash. i need to compare data_count values of all .
my %result (
$abc => {
'data_count' => '10',
'ID' => 'ABC122',
}
$def => {
'data_count' => '20',
'ID' => 'defASe',
... (1 Reply)
I am trying to speed up creating a line by line hash file from a huge file using Perl.
Here is my current (working but too slow) Bash code:
(while read line; do hash=$(echo -n $line | md5sum); echo ${hash:0:32}; done)And here is my Perl code:
perl -MDigest::MD5 -le 'foreach $line ( <STDIN> )... (3 Replies)
Experts - Any advice on how to get a hash value in a foreach loop?
Values print correctly on standalone print statements, but I can't access value
in foreach loop.
See sample code below and thanks in advance.
foreach my $z (sort keys %hash) {
for $y (@{$hash{$z}}) {
print "$z... (6 Replies)
Discussion started by: timj123
6 Replies
LEARN ABOUT OSX
moose::cookbook::basics::immutable
Moose::Cookbook::Basics::Immutable(3) User Contributed Perl Documentation Moose::Cookbook::Basics::Immutable(3)NAME
Moose::Cookbook::Basics::Immutable - Making Moose fast by making your class immutable
VERSION
version 2.0604
SYNOPSIS
package Point;
use Moose;
has 'x' => ( isa => 'Int', is => 'ro' );
has 'y' => ( isa => 'Int', is => 'rw' );
__PACKAGE__->meta->make_immutable;
DESCRIPTION
The Moose metaclass API provides a "make_immutable()" method. Calling this method does two things to your class. First, it makes it faster.
In particular, object construction and destruction are effectively "inlined" in your class, and no longer invoke the meta API.
Second, you can no longer make changes via the metaclass API, such as adding attributes. In practice, this won't be a problem, as you
rarely need to do this after first loading the class.
CONCLUSION
We strongly recommend you make your classes immutable. It makes your code much faster, with a small compile-time cost. This will be
especially noticeable when creating many objects.
AUTHOR
Moose is maintained by the Moose Cabal, along with the help of many contributors. See "CABAL" in Moose and "CONTRIBUTORS" in Moose for
details.
COPYRIGHT AND LICENSE
This software is copyright (c) 2012 by Infinity Interactive, Inc..
This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.
perl v5.16.2 2012-09-19 Moose::Cookbook::Basics::Immutable(3)