add dropzeros! method

Author: abhinavmehndiratta

src/Interface/Interface.jl

@@ -12,6 +12,6 @@ include("Utils.jl")
 include("./Object_Methods/Matrix_Methods.jl")
 include("./Object_Methods/Vector_Methods.jl")
 include("./Object_Methods/Descriptor_Methods.jl")
-export findnz, nnz, LowerTriangular, UpperTriangular, Diagonal
+export findnz, nnz, LowerTriangular, UpperTriangular, Diagonal, dropzeros!
 
 end # end of module

src/Interface/Object_Methods/Matrix_Methods.jl

@@ -440,3 +440,14 @@ function Diagonal(A::GrB_Matrix{T}) where T
     end
     return D
 end
+
+"""
+    dropzeros!(A)
+
+Remove all zero entries from GraphBLAS matrix.
+"""
+function dropzeros!(A::GrB_Matrix)
+    outp_replace_desc = GrB_Descriptor(Dict(GrB_OUTP => GrB_REPLACE))
+    GrB_assign(A, A, GrB_NULL, A, GrB_ALL, 0, GrB_ALL, 0, outp_replace_desc)
+    GrB_free(outp_replace_desc)
+end

src/Interface/Object_Methods/Vector_Methods.jl

@@ -339,3 +339,14 @@ function copy(V::GrB_Vector{T}) where T
     end
     return W
 end
+
+"""
+    dropzeros!(v)
+
+Remove all zero entries from GraphBLAS vector.
+"""
+function dropzeros!(v::GrB_Vector)
+    outp_replace_desc = GrB_Descriptor(Dict(GrB_OUTP => GrB_REPLACE))
+    GrB_assign(v, v, GrB_NULL, v, GrB_ALL, 0, outp_replace_desc)
+    GrB_free(outp_replace_desc)
+end

src/SuiteSparseGraphBLAS.jl

@@ -1897,7 +1897,7 @@ include("Operations/Select.jl")
 # Higher-level interface
 include("Interface/Interface.jl")
 using .Interface
-export findnz, nnz, LowerTriangular, UpperTriangular, Diagonal
+export findnz, nnz, LowerTriangular, UpperTriangular, Diagonal, dropzeros!
 
 # Extensions to the spec
 export