Training, Open Source Programming Languages

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Analysing a file / counting events
Input and Output in Ruby example from a Well House Consultants training course
More on Input and Output in Ruby [link]

This example is described in the following article(s):
   • Ruby Programming Course - Saturday and Sunday - [link]

Source code: filemore Module: R106

about = <<"DONE"

This example reads in a file of people and their skills
and reports on the people and also a count of each of
the various skills. It's a demonstration of hashes
and arrays in Ruby.

DONE

topskill = Hash.new
scount = Hash.new
File.new("../requests.xyz").readlines.each do |lyne|
        stuff = lyne.split(" ")
        name = stuff[0]
        tops = stuff[1]
        topskill[name] = tops

        stuff.shift
        stuff.each do |skill|
                scount[skill] = scount[skill] == nil ? 1 : scount[skill] + 1
        end
end

topskill.keys.sort.each do |nyme|
        print "#{nyme} ... #{topskill[nyme]}\n"
        end

scount.keys.each do |skz|
        print "#{skz} ... #{scount[skz]}\n"
        end

$result = <<"EXAMPLE"

Here is an example of the output:

Dorothy:rn grahamellis$ ruby filemore
adam ... Python
antonia ... Perl
barbara ... Tcl/Tk
barry ... Python
charles ... Perl
cherry ... Perl
david ... Perl
delia ... XML
ed ... Ruby
ethel ... MySQL
florence ... Ruby
fred ... MySQL
gloria ... XML
graham ... Lua
harry ... PHP
hazel ... PHP
iris ... Perl
ivan ... Ruby
jenny ... XML
john ... PHP
ken ... Tcl/Tk
kerry ... ASP
leane ... PHP
len ... Perl
margaret ... XML
morris ... Perl
nigel ... PHP
nina ... Tcl/Tk
olivia ... MySQL
orpheus ... MySQL
peter ... PHP
petra ... XML
queenie ... Lua
quentin ... Tcl/Tk
rita ... PHP
rupert ... Java
sally ... Tcl/Tk
steve ... Tcl/Tk
tina ... Tcl/Tk
tommy ... Perl
ulsyees ... Java
uva ... MySQL
venus ... Java
victor ... Ruby
wendy ... Perl
william ... Ruby
xavier ... PHP
xena ... Java
yollanda ... Ruby
yuri ... XML
zachary ... MySQL
zoe ... Ruby
XML ... 14
Lua ... 17
PHP ... 23
Ruby ... 24
Python ... 9
Java ... 27
MySQL ... 22
ASP ... 1
Perl ... 41
Tcl/Tk ... 26
Dorothy:rn grahamellis$

EXAMPLE
Learn about this subject
This module and example are covered on the following public courses:
 * Learning to program in Ruby
 * Ruby Programming
Also available on on site courses for larger groups

Books covering this topic
Yes. We have over 700 books in our library. Books covering Ruby are listed here and when you've selected a relevant book we'll link you on to Amazon to order.

Other Examples
This example comes from our "Input and Output in Ruby" training module. You'll find a description of the topic and some other closely related examples on the "Input and Output in Ruby" module index page.

Full description of the source code
You can learn more about this example on the training courses listed on this page, on which you'll be given a full set of training notes.

Many other training modules are available for download (for limited use) from our download centre under an Open Training Notes License.

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