import  {  Pipe ,  PipeTransform  }  from   '@angular/core' ;
@ Pipe ({      name:   'formatDay' })
export   class   FormatDayPipe   implements   PipeTransform  {      transform ( value :  any ):  any  {          if  ( value  !==  undefined ) {              let   weekArray  =  new   Array ( '週日' ,  '週一' ,  '週二' ,  '週三' ,  '週四' ,  '週五' ,  '週六' );              let   myDate  =  new   Date ( value );              let   week  =  weekArray [ myDate . getDay ()];              return   week ;         }     } }