use shouldComponentUpdate in react component code example

Example 1: lifecycle method react

INITIALIZATION= setup props and state 
MOUNTING= constructor->componentWillMount->render->componentDidMount//Birth
UPDATE= shouldComponentUpdate->componentWillUpdate->render
  		->componentDidUpdate //Growth
UNMOUNTING= componentWillUnmount //Death

Example 2: shouldcomponentupdate

shouldComponentUpdate(nextProps, nextState) {
  return true;
}