pub fn delete_filter<F>(&mut self, conds: &[cmp::Condition<T>], mut f: F)
        where F: FnMut(&R) -> bool
    {
        // find the rows we should delete
        let rowids = self.using_index(conds)
            .map(|rowi| (rowi, &self.rows[&rowi]))
            .filter(move |&(_, row)| conds.iter().all(|c| c.matches(row)))
            .filter(|&(_, row)| f(row))
            .map(|(rowid, _)| rowid)
            .collect::<Vec<_>>();

        let deleted = rowids.into_iter()
            .map(|rowid| (rowid, self.rows.remove(&rowid).unwrap()))
            .collect::<Vec<_>>();

        for (rowid, row) in deleted.into_iter() {
            for (col, idx) in self.indices.iter_mut() {
                idx.undex(row.index(*col), rowid);
            }
        }
    }
/// Delete all rows that match the given conditions *and* where the given filter function
/// returns true.
///
/// This requires that `R` implements `IntoIterator`, and that the columns are yielded *in
/// column order*.
Delete all rows that match the given conditions *and* where the given filter function
returns true.

This requires that `R` implements `IntoIterator`, and that the columns are yielded *in
column order*.
Delete all rows that match the given conditions * and * where the given filter function returns true . This requires that ` R ` implements ` IntoIterator ` and that the columns are yielded * in column order * .
pub fn delete_filter<F>(&mut self, conds: &[cmp::Condition<T>], mut f: F)
        where F: FnMut(&R) -> bool
    {
        // find the rows we should delete
        let rowids = self.using_index(conds)
            .map(|rowi| (rowi, &self.rows[&rowi]))
            .filter(move |&(_, row)| conds.iter().all(|c| c.matches(row)))
            .filter(|&(_, row)| f(row))
            .map(|(rowid, _)| rowid)
            .collect::<Vec<_>>();
        let deleted = rowids.into_iter()
            .map(|rowid| (rowid, self.rows.remove(&rowid).unwrap()))
            .collect::<Vec<_>>();
        for (rowid, row) in deleted.into_iter() {
            for (col, idx) in self.indices.iter_mut() {
                idx.undex(row.index(*col), rowid);
            }
        }
    }
pub fn delete_filter < F > ( & mut self , conds : & [ cmp :: Condition < T > ] , mut f : F ) where F : FnMut ( & R ) -> bool { // find the rows we should delete let rowids = self . using_index ( conds ) . map ( | rowi | ( rowi , & self . rows [ & rowi ] ) ) . filter ( move | & ( _ , row ) | conds . iter ( ) . all ( | c | c . matches ( row ) ) ) . filter ( | & ( _ , row ) | f ( row ) ) . map ( | ( rowid , _ ) | rowid ) . collect :: < Vec < _ > > ( ) ; let deleted = rowids . into_iter ( ) . map ( | rowid | ( rowid , self . rows . remove ( & rowid ) . unwrap ( ) ) ) . collect :: < Vec < _ > > ( ) ; for ( rowid , row ) in deleted . into_iter ( ) { for ( col , idx ) in self . indices . iter_mut ( ) { idx . undex ( row . index ( * col ) , rowid ) ; } } }
Delete all rows that match the given conditions *and* where the given filter function
returns true.
Delete all rows that match the given conditions * and * where the given filter function returns true .
&mut self
conds
&[cmp::Condition<T>]
f
F
&mut self
conds
&[cmp::Condition<T>]
f
F