Being good at problem-solving is one thing but to take your career to the next level, one must know how complex software projects are architected. Software design patterns provide templates and tricks used to design and solve recurring software problems and tasks.  Applying time-tested patterns result in extensible, maintainable and flexible high-quality code, exhibiting superior craftsmanship of a software engineer. Being well-versed in knowledge of design patterns allows one to spot brittle and immature code from miles away. The course goes to great lengths to lay bare the esoteric concepts of various design patterns before the reader and is replete with real-world examples and sample code.
The readership for this course is expected to be familiar with some object orientated language. The course examples and snippets are written in the Java language but folks with experience in other OOP languages should easily be able to follow the discussion and code intent.

Software Design Patterns:  Best Practices for Software Developers

<div class="card-quiz">
   <h2>What is it ?</h2>
    <div class="ans">
<p>The state pattern will be reminiscent of automata class from your undergraduate degree as it involves state transitions for an object. The state pattern encapsulates the various states a machine can be in. The machine or the <b><i>context</i></b>, as it is called in pattern-speak, can have actions taken on it that propel it into different states. Without the use of the pattern, the code becomes inflexible and littered with if-else conditionals.</p>

<p>Formally, the pattern is defined as <b><i>allowing an object to alter behavior when its internal state changes so that it appears to change its class</i></b>.</p>
     </div>
</div>

<div>
   <h2>What is it ?</h2>
    <div>
<p>The state pattern will be reminiscent of automata class from your undergraduate degree as it involves state transitions for an object. The state pattern encapsulates the various states a machine can be in. The machine or the <b><i>context</i></b>, as it is called in pattern-speak, can have actions taken on it that propel it into different states. Without the use of the pattern, the code becomes inflexible and littered with if-else conditionals.</p>

<p>Formally, the pattern is defined as <b><i>allowing an object to alter behavior when its internal state changes so that it appears to change its class</i></b>.</p>
     </div>
</div>

This lesson discusses how an object exhibits very different behavior and appears to be an instance of a different class when its internal state changes under the state pattern.

Start

Creational Patterns

Structural Patterns

Behavioral Patterns

The End

State Pattern

What is it ?