nl_tokens: Get the casing of value .
pl_tokens: function casing ( <mask> ) { var head = exact ( value . charAt ( 0 ) ) var rest = value . slice ( 1 ) if ( ! rest ) { return head } rest = exact ( rest ) if ( head === rest ) { return head } if ( head === 'u' && rest === 'l' ) { return 's' } return null }