perl + numeration word or parameter in file - perl

Question

I need help about how to numeration text in file.
I have also linux machine and I need to write the script with perl
I have file name: file_db.txt
In this file have parameters like name,ParameterFromBook,NumberPage,BOOK_From_library,price etc
Each parameter equal to something as name=elephant
My question How to do this by perl
I want to give number for each parameter (before the "=") that repeated (unique parameter) in the file , and increase by (+1) the new number of the next repeated parameter until EOF
lidia
For example
file_db.txt before numbering
parameter=1
name=one
parameter=2
name=two
file_db.txt after parameters numbering
parameter1=1
name1=one
parameter2=2
name2=two
other examples
Example1 before
name=elephant
ParameterFromBook=234
name=star.world
ParameterFromBook=200
name=home_room1
ParameterFromBook=264
Example1 after parameters numbering
name1=elephant
ParameterFromBook1=234
name2=star.world
ParameterFromBook2=200
name3=home_room1
ParameterFromBook3=264
Example2 before
file_db.txt before numbering
lines_and_words=1
list_of_books=3442
lines_and_words=13
list_of_books=344224
lines_and_words=120
list_of_books=341
Example2 after
file_db.txt after parameters numbering
lines_and_words1=1
list_of_books1=3442
lines_and_words2=13
list_of_books2=344224
lines_and_words3=120
list_of_books3=341

Answer 1

It can be condensed to a one line perl script pretty easily, though I don't particularly recommend it if you want readability:
#!/usr/bin/perl
s/(.*)=/$k{$1}++;"$1$k{$1}="/e and print while <>;
This version reads from a specified file, rather than using the command line:
#!/usr/bin/perl
open IN, "/tmp/file";
s/(.*)=/$k{$1}++;"$1$k{$1}="/e and print while <IN>;

Answer 2

The way I look at it, you probably want to number blocks and not just occurrences. So you probably want the number on each of the keys to be at least as great as the earliest repeating key.
my $in = \*::DATA;
my $out = \*::STDOUT;
my %occur;
my $num = 0;
while ( <$in> ) {
if ( my ( $pre, $key, $data ) = m/^(\s*)(\w+)=(.*)/ ) {
$num++ if $num < ++$occur{$key};
print { $out } "$pre$key$num=$data\n";
}
else {
$num++;
print;
}
}
__DATA__
name=elephant
ParameterFromBook=234
name=star.world
ParameterFromBook=200
name=home_room1
ParameterFromBook=264
However, if you just wanted to give the key it's particular count. This is enough:
my %occur;
while ( <$in> ) {
my ( $pre, $key, $data ) = m/^(\s*)(\w+)=(.*)/;
$occur{$key}++;
print { $out } "$pre$key$occur{$key}=$data\n";
}

Answer 3

in pretty much pseudo code:
open(DATA, "file");
my #lines = <DATA>;
my %tags;
foreach line (#lines)
{
my %parts=split(/=/, $line);
my $name=$parts[0];
my $value=$parts[1];
$name = ${name}$tags{ $name };
$tags{ $name } = $tags{ $name } + 1;
printf "${name}=$value\n";
}
close( DATA );
This looks like a CS101 assignment. Is it really good to ask for complete solutions instead of asking specific technical questions if you have difficulty?

Answer 4

If Perl is not a must, here's an awk version
$ cat file
name=elephant
ParameterFromBook=234
name=star.world
ParameterFromBook=200
name=home_room1
ParameterFromBook=264
$ awk -F"=" '{s[$1]++}{print $1s[$1],$2}' OFS="=" file
name1=elephant
ParameterFromBook1=234
name2=star.world
ParameterFromBook2=200
name3=home_room1
ParameterFromBook3=264