diff options
| -rw-r--r-- | decoder/sparse_vector.h | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/decoder/sparse_vector.h b/decoder/sparse_vector.h index 455a162b..9c7c9c79 100644 --- a/decoder/sparse_vector.h +++ b/decoder/sparse_vector.h @@ -176,6 +176,17 @@ public: return *this; } + friend SparseVector<T> operator -(SparseVector<T> x,SparseVector<T> const& y) { + x-=y; + return x; + } + friend SparseVector<T> operator +(SparseVector<T> x,SparseVector<T> const& y) { + x+=y; + return x; + } + +private: + // DEPRECATED: becuase 0 values are dropped from the map, this doesn't even make sense if you have a fully populated (not really sparse re: what you'll ever use) vector SparseVector<T> &operator-=(T const& x) { for (typename MapType::iterator it = values_.begin(); it != values_.end(); ++it) @@ -189,7 +200,7 @@ public: it->second += x; return *this; } - +public: SparseVector<T> &operator/=(const T &x) { for (typename MapType::iterator it = values_.begin(); it != values_.end(); ++it) |