diff --git a/wherehows-web/app/components/datasets/containers/dataset-compliance.ts b/wherehows-web/app/components/datasets/containers/dataset-compliance.ts
index 775a0119e9..a2b4caf27e 100644
--- a/wherehows-web/app/components/datasets/containers/dataset-compliance.ts
+++ b/wherehows-web/app/components/datasets/containers/dataset-compliance.ts
@@ -306,7 +306,7 @@ export default class DatasetComplianceContainer extends Component {
       await this.notifyOnSave<void>(
         saveDatasetComplianceByUrn(get(this, 'urn'), {
           ...complianceInfo,
-          // filter out readonly entities, then fleece readonly attribute from remaining entities before save
+          // filter out readonly entities, then omit readonly attribute from remaining entities before save
           complianceEntities: removeReadonlyAttr(editableTags(complianceEntities))
         })
       );
diff --git a/wherehows-web/app/constants/dataset-compliance.ts b/wherehows-web/app/constants/dataset-compliance.ts
index 7d5c9e2607..8b2fd1e97a 100644
--- a/wherehows-web/app/constants/dataset-compliance.ts
+++ b/wherehows-web/app/constants/dataset-compliance.ts
@@ -3,7 +3,7 @@ import { IdLogicalType, PurgePolicy } from 'wherehows-web/constants/index';
 import { IComplianceEntity, IComplianceInfo } from 'wherehows-web/typings/api/datasets/compliance';
 import { IComplianceDataType } from 'wherehows-web/typings/api/list/compliance-datatypes';
 import { arrayEvery, arrayFilter, arrayMap, arrayReduce, arraySome, reduceArrayAsync } from 'wherehows-web/utils/array';
-import { fleece, hasEnumerableKeys } from 'wherehows-web/utils/object';
+import { omit, hasEnumerableKeys } from 'wherehows-web/utils/object';
 import { lastSeenSuggestionInterval } from 'wherehows-web/constants/metadata-acquisition';
 import { decodeUrn, isValidCustomValuePattern } from 'wherehows-web/utils/validators/urn';
 import {
@@ -120,7 +120,7 @@ const editableTags = (entities: Array<IComplianceEntity>): Array<IComplianceEnti
  * @type {(entities: Array<IComplianceEntity>) => Array<IComplianceEntity>}
  */
 const removeReadonlyAttr = <(entities: Array<IComplianceEntity>) => Array<IComplianceEntity>>arrayMap(
-  fleece<IComplianceEntity, 'readonly'>(['readonly'])
+  (entity: IComplianceEntity) => omit(entity, ['readonly'])
 );
 
 /**
diff --git a/wherehows-web/app/services/notifications.ts b/wherehows-web/app/services/notifications.ts
index 08c7c78f81..c6b405a765 100644
--- a/wherehows-web/app/services/notifications.ts
+++ b/wherehows-web/app/services/notifications.ts
@@ -2,7 +2,7 @@ import Service from '@ember/service';
 import { setProperties, get, set } from '@ember/object';
 import { delay } from 'wherehows-web/utils/promise-delay';
 import { action } from '@ember-decorators/object';
-import { fleece } from 'wherehows-web/utils/object';
+import { omit } from 'wherehows-web/utils/object';
 import { notificationDialogActionFactory } from 'wherehows-web/utils/notifications/notifications';
 import { noop } from 'wherehows-web/utils/helpers/functions';
 
@@ -155,14 +155,9 @@ const notificationHandlers: INotificationHandler = {
     props = { dismissButtonText: 'No', confirmButtonText: 'Yes', ...props };
     const { dismissButtonText, confirmButtonText, onDialogToggle } = props;
     // Removes dismiss or confirm buttons if set to false
-    let resolvedProps: IConfirmOptions =
-      dismissButtonText === false
-        ? <IConfirmOptions>fleece<IConfirmOptions, 'dismissButtonText'>(['dismissButtonText'])(props)
-        : props;
-    resolvedProps =
-      confirmButtonText === false
-        ? <IConfirmOptions>fleece<IConfirmOptions, 'confirmButtonText'>(['confirmButtonText'])(props)
-        : props;
+    let resolvedProps: IConfirmOptions = dismissButtonText === false ? omit(props, ['dismissButtonText']) : props;
+
+    resolvedProps = confirmButtonText === false ? omit(props, ['confirmButtonText']) : props;
     resolvedProps = typeof onDialogToggle === 'function' ? props : { ...props, onDialogToggle: noop };
 
     return {
diff --git a/wherehows-web/app/utils/api/datasets/owners.ts b/wherehows-web/app/utils/api/datasets/owners.ts
index 4bb36e3ef7..e7f6518e34 100644
--- a/wherehows-web/app/utils/api/datasets/owners.ts
+++ b/wherehows-web/app/utils/api/datasets/owners.ts
@@ -10,7 +10,7 @@ import { datasetUrlByUrn } from 'wherehows-web/utils/api/datasets/shared';
 import { getJSON, postJSON } from 'wherehows-web/utils/api/fetcher';
 import { getApiRoot, ApiStatus } from 'wherehows-web/utils/api/shared';
 import { arrayFilter, arrayMap } from 'wherehows-web/utils/array';
-import { fleece } from 'wherehows-web/utils/object';
+import { omit } from 'wherehows-web/utils/object';
 
 /**
  * Defines a string enum for valid owner types
@@ -149,7 +149,7 @@ const readDatasetSuggestedOwnersByUrn = async (urn: string): Promise<IOwnerRespo
  * @return {Promise<void>}
  */
 const updateDatasetOwnersByUrn = (urn: string, csrfToken: string = '', updatedOwners: Array<IOwner>): Promise<{}> => {
-  const ownersWithoutModifiedTime = arrayMap(fleece<IOwner, 'modifiedTime'>(['modifiedTime']));
+  const ownersWithoutModifiedTime = arrayMap((owner: IOwner) => omit(owner, ['modifiedTime']));
 
   return postJSON<{}>({
     url: datasetOwnersUrlByUrn(urn),
diff --git a/wherehows-web/app/utils/api/datasets/retention.ts b/wherehows-web/app/utils/api/datasets/retention.ts
index cf30d3f620..7f1444a9a6 100644
--- a/wherehows-web/app/utils/api/datasets/retention.ts
+++ b/wherehows-web/app/utils/api/datasets/retention.ts
@@ -2,7 +2,7 @@ import { getJSON, postJSON } from 'wherehows-web/utils/api/fetcher';
 import { datasetUrlByUrn } from 'wherehows-web/utils/api/datasets/shared';
 import { IDatasetRetention, IGetDatasetRetentionResponse } from 'wherehows-web/typings/api/datasets/retention';
 import { isNotFoundApiError } from 'wherehows-web/utils/api';
-import { fleece } from 'wherehows-web/utils/object';
+import { omit } from 'wherehows-web/utils/object';
 import { encodeUrn } from 'wherehows-web/utils/validators/urn';
 
 /**
@@ -38,7 +38,7 @@ const readDatasetRetentionByUrn = async (urn: string): Promise<IGetDatasetRetent
 const saveDatasetRetentionByUrn = (urn: string, retention: IDatasetRetention): Promise<IDatasetRetention> =>
   postJSON<IDatasetRetention>({
     url: datasetRetentionUrlByUrn(urn),
-    data: fleece<IDatasetRetention, 'modifiedTime' | 'modifiedBy'>(['modifiedBy', 'modifiedTime'])(retention)
+    data: omit(retention, ['modifiedBy', 'modifiedTime'])
   });
 
 export { readDatasetRetentionByUrn, saveDatasetRetentionByUrn };
diff --git a/wherehows-web/app/utils/datasets/retention.ts b/wherehows-web/app/utils/datasets/retention.ts
index 64d3ec0d03..972f72a1a8 100644
--- a/wherehows-web/app/utils/datasets/retention.ts
+++ b/wherehows-web/app/utils/datasets/retention.ts
@@ -1,6 +1,6 @@
 import { IComplianceInfo } from 'wherehows-web/typings/api/datasets/compliance';
 import { IDatasetRetention } from 'wherehows-web/typings/api/datasets/retention';
-import { fleece } from 'wherehows-web/utils/object';
+import { pick } from 'wherehows-web/utils/object';
 
 /**
  * Extracts values from an IComplianceInfo instance to create an instance of IDatasetRetention
@@ -8,11 +8,11 @@ import { fleece } from 'wherehows-web/utils/object';
  * @returns {IDatasetRetention}
  */
 const extractRetentionFromComplianceInfo = (complianceInfo: IComplianceInfo): IDatasetRetention => {
-  const { datasetUrn, compliancePurgeNote, complianceType } = <IComplianceInfo>fleece<IComplianceInfo>([
+  const { datasetUrn, compliancePurgeNote, complianceType } = pick(complianceInfo, [
     'complianceType',
     'compliancePurgeNote',
     'datasetUrn'
-  ])(complianceInfo);
+  ]);
 
   return {
     purgeNote: compliancePurgeNote,
diff --git a/wherehows-web/app/utils/object.ts b/wherehows-web/app/utils/object.ts
index 01ba2361a2..7551a289d7 100644
--- a/wherehows-web/app/utils/object.ts
+++ b/wherehows-web/app/utils/object.ts
@@ -1,3 +1,18 @@
+import { arrayReduce } from 'wherehows-web/utils/array';
+
+/**
+ * Aliases the exclusion / diff conditional type that specifies that an object
+ * contains properties from T, that are not in K
+ * @alias
+ */
+type Omit<T, K> = Pick<T, Exclude<keyof T, K>>;
+
+/**
+ * Aliases the selection / extract conditional type that specifies that an object
+ * contains properties from T, that are in K
+ */
+type Select<T, K> = Pick<T, Extract<keyof T, K>>;
+
 /**
  * Checks if a type is an object
  * @param {any} candidate the entity to check
@@ -12,30 +27,34 @@ const isObject = (candidate: any): candidate is object =>
  */
 const hasEnumerableKeys = (object: any): boolean => isObject(object) && !!Object.keys(object).length;
 
-/**
- * Function interface for a identity or partial return function
- * @interface IPartialOrIdentityTypeFn
- * @template T
- */
-interface IPartialOrIdentityTypeFn<T> {
-  (o: T): Partial<T> | T;
-}
 /**
  * Non mutative object attribute deletion. Removes the specified keys from a copy of the object and returns the copy.
  * @template T the object type to drop keys from
  * @template K the keys to be dropped from the object
- * @param {Array<K>} [droppedKeys=[]] the list of attributes on T to be dropped
- * @returns {IPartialOrIdentityTypeFn<T>}
+ * @param {T} o
+ * @param {Array<K extends keyof T>} droppedKeys
+ * @return {Pick<T, Exclude<keyof T, K extends keyof T>>}
  */
-const fleece = <T, K extends keyof T = keyof T>(droppedKeys: Array<K> = []): IPartialOrIdentityTypeFn<T> => (
-  o: T
-): Partial<T> | T => {
+const omit = <T, K extends keyof T>(o: T, droppedKeys: Array<K>): Omit<T, K> => {
   const partialResult = Object.assign({}, o);
 
-  return droppedKeys.reduce((partial, key) => {
+  return arrayReduce((partial: T, key: K) => {
     delete partial[key];
     return partial;
-  }, partialResult);
+  }, partialResult)(droppedKeys);
 };
 
-export { isObject, hasEnumerableKeys, fleece };
+/**
+ * Extracts keys from a source to a new object
+ * @template T the object to select keys from
+ * @param {T} o the source object
+ * @param {Array<K extends keyof T>} pickedKeys
+ * @return {Select<T extends object, K extends keyof T>}
+ */
+const pick = <T extends object, K extends keyof T>(o: T, pickedKeys: Array<K>): Select<T, K> =>
+  arrayReduce(
+    (partial: T, key: K) => (pickedKeys.includes(key) ? Object.assign(partial, { [key]: o[key] }) : partial),
+    <T>{}
+  )(pickedKeys);
+
+export { isObject, hasEnumerableKeys, omit, pick };