function validateEmail(email) {

  var re = /\S+@\S+\.\S+/;

  return re.test(email);

}

console.log(validateEmail('my email is anystring@anystring.any')); // true

console.log(validateEmail('my email is anystring@anystring .any')); // false

​

function validateEmail($email) {

  var emailReg = /^([\w-\.]+@([\w-]+\.)+[\w-]{2,4})?$/;

  return emailReg.test( $email );

}

​

if( !validateEmail(emailaddress)) { /* do stuff here */ }

if(value.match( /^[a-zA-Z0-9.!#$%&'*+/=?^_`{|}~-]+@[a-zA-Z0-9-]+(?:\.[a-zA-Z0-9-]+)*$/gi)){

//code here

}

/^[^\s@]+@[^\s@]+\.[^\s@]+$/

/^[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*@(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?$/

SELECT * FROM table_name WHERE MOD(id, 2) = 0;

# if the name of the symbolic link is "sym-link", just type the below command to rmeove it

rm sym-link