initial commit

src/components/categorical/createCategoryCounts.js

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+import * as globals from "../../globals.js"
+
+/*
+  end result:
+
+  counts: {
+    Sample.type: {
+      glioblastoma: 3452
+    },
+    Selection: {
+      foo: 234,
+      bar: 21
+    }
+  }
+
+*/
+
+const categories = globals.categories;
+
+const createCategoryCounts = (cells) => {
+
+  /* instantiate counts obj */
+  const counts = {};
+  
+  categories.forEach((category) => {
+    counts[category] = {};
+  })
+
+  cells.forEach((cell) => {
+    categories.forEach((category) => {
+
+      /* if, for the given category (ie., categories.Location), we do not have ie., glioblastoma already, create it. Otherwise increment it. */
+      if (!counts[category][cell[category]]) {
+        counts[category][cell[category]] = 1;
+      } else {
+        counts[category][cell[category]]++
+      }
+
+    })
+  });
+
+  return counts;
+}
+
+export default createCategoryCounts;