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Validate if the string passed in a valid email or not

returns true or false 

var emailfilter=/^\w+[\+\.\w-]*@([\w-]+\.)*\w+[\w-]*\.([a-z]{2,4}|\d+)$/i

returnval=emailfilter.test(<Email address to be tested >);

in the below code  the 2 can be replaced  with n number and \s is for space and \n for new line charecter 

$string  =~ s/(\s)/(++$count%2==0)?”\n”:$1/ige;