@users = User.find(
  :all, 
  :select => "MONTH(created_at) as month, YEAR(created_at) as year, COUNT(*) AS records",
  :conditions => ["admin = 0'"], 
  :group => "year, month")

<% for @user in @users %>
  <%=@user.month%>
  <%=@user.year%>
  <%=@user.records%>
<% end %>

#!/usr/bin/perl
#==========================================================================================
# howmany -- a tool for determining how many different types of files are in a folder
#------------------------------------------------------------------------------------------
# Author: Elliot Winkler <elliot.winkler@gmail.com>
# Created: 11 Mar 2008
#==========================================================================================

my $dir = $ARGV[0] || ".";
my $cmd = "find $dir";
my @listing = sort grep { $_ } split /\n/, `$cmd`;

my %exts;
for (@listing) {
  my($ext) = /\.([a-z]+)$/;
  next unless $ext;
  $exts{lc $ext}++;
}

for (sort keys %exts) {
  print uc($_).": ".$exts{$_}."\n";
}

$ cd ~/docs
$ howmany
CSV: 3
DOC: 1
KEY: 1
PUB: 1
SQL: 1
TEXT: 1
TXT: 9
XCF: 2
XLS: 1
ZIP: 1
$ howmany ~/docs
CSV: 3
DOC: 1
KEY: 1
PUB: 1
SQL: 1
TEXT: 1
TXT: 9
XCF: 2
XLS: 1
ZIP: 1

require 'rexml/document'
include REXML

file = File.new('test.xml')
doc = Document.new(file)
puts doc.root.elements.to_a.length

count = 0
count += byte & 1 and byte >>= 1 until byte == 0

<?php
function ArrayGroupByCount($_array, $sort = false) {
   $count_array = array();

   foreach (array_unique($_array) as $value) {
       $count = 0;

		foreach ($_array as $element) {
		    if ($element == $value)
		        $count++;
		}
	
		$count_array[$value] = $count;
	}
	
	if ( $sort == 'desc' )
		arsort($count_array);
	elseif ( $sort == 'asc' )
		asort($count_array);

	return $count_array;
}
?>

select count (*) as total from bppersondisabledstandardsetups group by setuptype;
select distinct bppersondisabledstandardsetups.setuptype from bppersondisabledstandardsetups;
select max(objid) from sdfields;

unsigned bit_count(unsigned x) {
    unsigned n;
    for (n = 0; x; n++)
        x &= x-1;
    return n;
}

#include <stdio.h>
#include <stdlib.h>

int main(int argc, char *argv[])
{
    int cont[257];
    int t;
    FILE *ent;
    
    for (t=0;t<257;t++)
        cont[t]=0;
      
    ent=fopen("input.txt","r");
//    printf("Se abrio el archivo :P\n");
    do {
        t = fgetc(ent);
        cont[t]++;
    } while (!feof(ent));
    fclose(ent);

    for (t=0;t<257;t++){
        printf("Caracter %i se repitio %i veces\n", t, cont[t]);
    }

    
//  system("PAUSE");	
  return 0;
}

# Determines the CSS class based on either the count given
# (returns 'even' or 'odd' as the CSS class name) or the class
# given (returns the string version of the class, lowercased,
# as the CSS class name)
def classify( count_or_class, include_class_text = true )
  if count_or_class.class == Fixnum
    value = ( count_or_class % 2 == 0 ? 'even' : 'odd' )
  else
    value = count_or_class.to_s.downcase
  end

  if include_class_text
    'class="' << value << '"'
  else
    value
  end
end

<table>
<% count = 0 %>
<% @collection.each do |value| %>
  <tr <%= classify( count ) %>>
    <td><%=h value %></td>
  </tr>
  <% count += 1 %>
<% end %>
</table>

<tr>
<% @columns.each do |column| %>
  <% data = row.send( column.name ) %>
  <td <%= classify( data.class ) %>>
    <%=h data %>
  </td>
<% end %>
</tr>

class Array
  def total
    t = 0
    self.each { |v| t += v }
    t
  end
end

[1,2,2,3].total  # => 8