More HDFS Manage Access dialog updates (#7692)

* Add support for default permissions on directories

(cherry picked from commit 4e81cceba142c6763c3447b4d2965cd75764f8f9)

* Remove unneeded import

(cherry picked from commit ffe5f357357e75e9290966e89768c699df2e1311)

* Add recursive apply and clean up webhdfs

(cherry picked from commit ae76df14f99e599df1cdfcc74ee22d3822f11a59)

* Final set of changes

* Undo changes to azdata/sqlops and few minor fixes

* Remove cast to fix build error

* Hide defaults checkbox for files and switch checkbox order

extensions/mssql/src/util/arrays.ts

@@ -19,4 +19,18 @@ export function equals<T>(one: ReadonlyArray<T>, other: ReadonlyArray<T>, itemEq
 
 export function flatten<T>(arr: ReadonlyArray<T>[]): T[] {
 	return ([] as T[]).concat.apply([], arr);
-}
+}
+
+export function groupBy<T>(data: ReadonlyArray<T>, compare: (a: T, b: T) => number): T[][] {
+	const result: T[][] = [];
+	let currentGroup: T[] | undefined = undefined;
+	for (const element of data.slice(0).sort(compare)) {
+		if (!currentGroup || compare(currentGroup[0], element) !== 0) {
+			currentGroup = [element];
+			result.push(currentGroup);
+		} else {
+			currentGroup.push(element);
+		}
+	}
+	return result;
+}