Solved

hash tables

Posted on 2003-11-03
2
229 Views
Last Modified: 2013-12-25
I have a .dat file which contains many line of data
i have split the line up using split() and i am wanting to read line[5] which contains a name and line[1] which contains it's value.
i want to read them into a hash table, then output them to file

how do i store the 2 values into a hash table and output them to a file in the following format

name, value
name, value
name, value


I know very little about hash tables so any feedback will be appreciated
0
Comment
Question by:plennon
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
2 Comments
 
LVL 2

Accepted Solution

by:
rootkiddy earned 125 total points
ID: 9673117
Below code is if you put the value's into a scalar.  If your input is in an array just wrap this with a for loop substituting $name with $name[$counter] and $value[$counter].  The for loop would look something like for($counter=0; $counter<@name; $counter++)


# This is where you split everything.
# $name is what I assumed you stored the name.
# $value is what I assumed you stored the value.

$input{"$name"} = $value;  # Creates a hash called input
                           # with the element your name
                           # retrieved with the the value
                           # that you retrieved

open(OUTPUT, ">name_of_outputfile") or die "Couldn't open the file for writing\n";

# Walk through each key in the hash input and print the key and the value in your format.
foreach $key (keys %input) {
   print OUTPUT "$key, $input{$key}\n";
}

close(OUTPUT);
0
 
LVL 51

Expert Comment

by:ahoffmann
ID: 9673688
@line=split(/your-pattern/, $inputfromdat);
$input{$line[5]}=$line[1];
# output hash to file, see previous suggestion
0

Featured Post

On Demand Webinar - Networking for the Cloud Era

This webinar discusses:
-Common barriers companies experience when moving to the cloud
-How SD-WAN changes the way we look at networks
-Best practices customers should employ moving forward with cloud migration
-What happens behind the scenes of SteelConnect’s one-click button

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Introduction This tutorial will give you a fast look what you can do with WhizBase. I expect you already know how to work with HTML at least, and that you understand the basics of the internet and how the internet works. WhizBase is a server-s…
It is a general practice to get rid of old user profiles on a computer  in a LAN environment. As I have been working with a company in a LAN environment where users move from one place to some other place at times. This will make many user profil…
Learn the basics of strings in Python: declaration, operations, indices, and slicing. Strings are declared with quotations; for example: s = "string": Strings are immutable.: Strings may be concatenated or multiplied using the addition and multiplic…
The viewer will learn how to dynamically set the form action using jQuery.

731 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question