Ensure to use const where possible

Author: ProductiveRage

src/matrix.ts

@@ -44,8 +44,8 @@ export class SparseMatrix {
     this.nRows = dims[0];
     this.nCols = dims[1];
     for (let i = 0; i < values.length; i++) {
-      var row = rows[i];
-      var col = cols[i];
+      const row = rows[i];
+      const col = cols[i];
       this.checkDims(row, col);
       const key = this.makeKey(row, col);
       this.entries.set(key, { value: values[i], row, col });

src/umap.ts

@@ -809,7 +809,7 @@ export class UMAP {
     const weights: number[] = [];
     const head: number[] = [];
     const tail: number[] = [];
-    var rowColValues = graph.getAll();
+    const rowColValues = graph.getAll();
     for (let i = 0; i < rowColValues.length; i++) {
         const entry = rowColValues[i];
         if (entry.value) {