How to use has_many in rails view

Here is the index_controller

  def index
    @categories = Category.all
  end

Here is the two models

1. Category model

has_many :sub_categories

2. sub_category model

belongs_to :category

And your view should contain

<% @categories.each do |category| %>
    <h1><%= category.title %></h1>
    <% category.sub_categories.each do |sub_category| %>
        <%= sub_category.descriptino %>
    <% end %>
<% end %>

phpPgAdmin Configuration for rails

1. cd /etc/postgresql/9.1/main

2. sudo nano pg_hba.conf

3. Change the line from

    local        all        postgres               peer

to

    local        all        postgres               md5

4.  save and exit
5. Then open sudo nano postgresql.conf

6. Change the listen address as listen_address = '*'

7. Now try localhost/phppgadmin 

Get current week of the month and year

Get current week of the current year

select extract(week from date_trunc('month', current_date))

Get current week of the current month

select extract(week from current_date) - extract(week from date_trunc('month',current_date))+1

get last month last and first date

To get last month's last and first date

SELECT (date_trunc('month', now()-interval '6 month')::date - 1) as last_month_date

SELECT (date_trunc('month', now()-interval '6 month')::date ) as first_month_date 

The above query can be used to get last month's last date from current month

Android view output in logcat

How to view android output in logcat:

Log.i("ref_name", String.valueOf(jArray.length()) );

Limit total words to be displayed - PHP

How to limit total words to be display in php

<?php
function get_words($text, $len){
$array = explode(" ", $text, $len+1);
if(count($array)>$len){
unset($array[$len]);
}
return implode(" ", $array);
}

$text = "This is a testing for limit word display.";

echo get_words($text, 3);
?>

Get tweets from twitter

How to get tweets in twitter

<?php

function get_tweet($username, $numberTweets)
{
$output = "";
$displayed = 0;
$url = "http://search.twitter.com/search.atom?q=from:$username&rpp=$numberTweets";
$xml = simplexml_load_file($url);
return $xml;
}
$tweet = get_tweet('your_name', 5);
foreach($tweet as $tweets){
echo $tweets->content.'<br />';
}
?>

Difference between bloginfo() and get_bloginfo()

Difference between get_bloginfo('template_url') and bloginfo('template_url')

1. <?php bloginfo('template_url'); ?>
2. <?php echo get_bloginfo('template_url'); ?>

echo is the only difference from both the function. 

Relative path in wordpress

How to use relative path in wordpress :

    In wordpress to solve relative path problem you can use a function and call it.

1. get_bloginfo('template_url')2. get_bloginfo('template_url')/path/file