question: public void deleteColumns ( int start , int len ) throws TableException { int ncol = this . arrays . length ; if ( start < 0 || len < 0 || start + len > ncol ) { throw new TableException ( "Invalid request to delete columns start: " + start + " length:" + len + " for table with " + ncol + " columns." ) ; } if ( len == 0 ) { return ; } int ocol = ncol ; ncol -= len ; Object [ ] newArrays = new Object [ ncol ] ; int [ ] newSizes = new int [ ncol ] ; Class < ? > [ ] newBases = new Class < ? > [ ncol ] ; char [ ] newTypes = new char [ ncol ] ; System . arraycopy ( this . arrays , 0 , newArrays , 0 , start ) ; System . arraycopy ( this . sizes , 0 , newSizes , 0 , start ) ; System . arraycopy ( this . bases , 0 , newBases , 0 , start ) ; System . arraycopy ( this . types , 0 , newTypes , 0 , start ) ; int rem = ocol - ( start + len ) ; System . arraycopy ( this . arrays , start + len , newArrays , start , rem ) ; System . arraycopy ( this . sizes , start + len , newSizes , start , rem ) ; System . arraycopy ( this . bases , start + len , newBases , start , rem ) ; System . arraycopy ( this . types , start + len , newTypes , start , rem ) ; this . arrays = newArrays ; this . sizes = newSizes ; this . bases = newBases ; this . types = newTypes ; initializePointers ( ) ; }
target:  Delete a contiguous set of columns from the table.