feat: rename grid sha1 to hash for better generality

src/Grid.fs

@@ -525,7 +525,7 @@ type ExtendedGrid(grid: IGrid) =
     let mutable elementTree: IdxTree option = None
     let mutable neighborIndex: NeighborIndex option = None
     let mutable centroids: Vertex [] option = None
-    let mutable gridSha1: byte[] = [||]
+    let mutable gridHash: byte[] = [||]
 
     let getNeighborIdx () =
         match neighborIndex with
@@ -621,12 +621,12 @@ type ExtendedGrid(grid: IGrid) =
             // this.initNodeTree ()
             Util.tryFindElement grid elementTree.Value p
 
-    member this.initSha1(hash: byte[]) =
-        if gridSha1.Length = 0 && hash.Length > 0 then
-            gridSha1 <- hash
+    member this.initHash(hash: byte[]) =
+        if gridHash.Length = 0 && hash.Length > 0 then
+            gridHash <- hash
 
-    member this.getSha1() =
-        if gridSha1.Length = 0 then
+    member this.getHash() =
+        if gridHash.Length = 0 then
             let bg : BinGrid = {
                 hash = [||]
                 vertices = (this :> IGrid).getVertices ()
@@ -634,11 +634,11 @@ type ExtendedGrid(grid: IGrid) =
             }
             let bytes = MessagePackSerializer.Serialize(bg)
             let sha1 = System.Security.Cryptography.SHA1.Create()
-            gridSha1 <- sha1.ComputeHash bytes
-        gridSha1
+            gridHash <- sha1.ComputeHash bytes
+        gridHash
 
-    member this.getSha1String() =
-        this.getSha1() |> Convert.ToHexStringLower
+    member this.getHashString() =
+        this.getHash() |> Convert.ToHexStringLower
 
     member this.getCentroids() =
         match centroids with