fix: build

packages/collection-utils/src/pick.ts

@@ -0,0 +1,41 @@
+/*
+ * Copyright (C) 2022 StApps
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation, version 3.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+/**
+ * Pick a set of properties from an object
+ */
+export function pick<T extends object, U extends keyof T>(object: T, keys: U[]): Pick<T, U> {
+  return keys.reduce((accumulator, key) => {
+    if (object.hasOwnProperty(key)) {
+      accumulator[key] = object[key];
+    }
+    return accumulator;
+  }, {} as Pick<T, U>);
+}
+
+/**
+ * Pick a set of properties from an object using a predicate function
+ */
+export function pickBy<T extends object, U extends keyof T>(
+  object: T,
+  predicate: (value: T[U], key: U) => boolean,
+): Pick<T, U> {
+  return (Object.keys(object) as U[]).reduce((accumulator, key) => {
+    if (predicate(object[key], key)) {
+      accumulator[key] = object[key];
+    }
+    return accumulator;
+  }, {} as Pick<T, U>);
+}