Syed Aslam

With uniq method you can remove duplicates from an array, however using the bitwise | operator we can avoid adding duplicate items in the first place.

ruby array tip uniq

Easy way to set a background from a selected number of images in Rails. You can set a background image purely through CSS thanks to the 'background-size' property in CSS3. Using the `html` element is better than `body` as it's always at least the height of the browser window. You set a fixed and centered background on it, then adjust it's size using `background-size` set to the cover keyword.

rails css helpers

Linked List is a linear collection of data elements, whose order is not given by their physical placement in memory. Instead, each element points to the next. It is a data structure consisting of a collection of nodes which together represent a sequence.

data-structures

The built-in class File provides the facilities for manipulating files in Ruby. Let us explore the basic file operations, including opening, reading, writing along with querying file objects to get information about the file itself.

ruby files

There are multiple ways to retrive a random row from a table. The fastest way requires no custom SQL.Let's see how to retrieve a random row from a table using ActiveRecord.

active-record

Its easy and quite common to forget a database's password. However, this doesn't mean the end of the world. Let's see how we can recover MySQL database server password following five easy steps.

mysql