remove interactions & worker-utils package, update misc/types

packages/misc-utils/collection-tools.ts

@@ -0,0 +1,26 @@
+export const difference = <T>(...arrays: T[][]) => {
+  return arrays.reduce((a, b) => a.filter((v) => !b.includes(v)));
+};
+
+export const groupBy = (arr: Record<string, any>[], key: string) => {
+  return arr.reduce((r, a) => {
+    r[a[key]] = [...r[a[key]], a];
+    return r;
+  }, {});
+};
+
+export const keyBy = (arr: Record<string, any>[], key: string) => {
+  return arr.reduce((r, a) => {
+    r[a[key]] = a;
+    return r;
+  }, {});
+};
+
+export const union = <T>(...arrays: T[][]) => {
+  return arrays.reduce((a, b) => [...a, ...b]);
+};
+
+export const isIdenticalArray = <T>(a1: T[], a2: T[]) => {
+  // DEIs: http://stackoverflow.com/a/40496893/308645
+  return a1.length === a2.length && a1.reduce((a, b) => a && a2.includes(b), true);
+};