Split filter out.

.internal/arrayFilter.js

@@ -1,24 +0,0 @@
-/**
- * A specialized version of `filter` for arrays.
- *
- * @private
- * @param {Array} [array] The array to iterate over.
- * @param {Function} predicate The function invoked per iteration.
- * @returns {Array} Returns the new filtered array.
- */
-function arrayFilter(array, predicate) {
-  let index = -1
-  let resIndex = 0
-  const length = array == null ? 0 : array.length
-  const result = []
-
-  while (++index < length) {
-    const value = array[index]
-    if (predicate(value, index, array)) {
-      result[resIndex++] = value
-    }
-  }
-  return result
-}
-
-export default arrayFilter

.internal/baseFilter.js

@@ -1,21 +0,0 @@
-import baseEach from './baseEach.js'
-
-/**
- * The base implementation of `filter`.
- *
- * @private
- * @param {Array|Object} collection The collection to iterate over.
- * @param {Function} predicate The function invoked per iteration.
- * @returns {Array} Returns the new filtered array.
- */
-function baseFilter(collection, predicate) {
-  const result = []
-  baseEach(collection, (value, index, collection) => {
-    if (predicate(value, index, collection)) {
-      result.push(value)
-    }
-  })
-  return result
-}
-
-export default baseFilter

filter.js

@@ -1,16 +1,13 @@
-import arrayFilter from './.internal/arrayFilter.js'
-import baseFilter from './.internal/baseFilter.js'
-
 /**
- * Iterates over elements of `collection`, returning an array of all elements
+ * Iterates over elements of `array`, returning an array of all elements
  * `predicate` returns truthy for. The predicate is invoked with three
- * arguments: (value, index|key, collection).
+ * arguments: (value, index, array).
  *
  * **Note:** Unlike `remove`, this method returns a new array.
  *
- * @since 0.1.0
+ * @since 5.0.0
- * @category Collection
+ * @category Array
- * @param {Array|Object} collection The collection to iterate over.
+ * @param {Array} array The array to iterate over.
  * @param {Function} predicate The function invoked per iteration.
  * @returns {Array} Returns the new filtered array.
  * @see pull, pullAll, pullAllBy, pullAllWith, pullAt, remove, reject
@@ -24,9 +21,19 @@ import baseFilter from './.internal/baseFilter.js'
  * filter(users, ({ active }) => active)
  * // => objects for ['barney']
  */
-function filter(collection, predicate) {
+function filter(array, predicate) {
-  const func = Array.isArray(collection) ? arrayFilter : baseFilter
+  let index = -1
-  return func(collection, predicate)
+  let resIndex = 0
+  const length = array == null ? 0 : array.length
+  const result = []
+
+  while (++index < length) {
+    const value = array[index]
+    if (predicate(value, index, array)) {
+      result[resIndex++] = value
+    }
+  }
+  return result
 }
 
 export default filter

filterObject.js

@@ -0,0 +1,29 @@
+/**
+ * Iterates over properties of `object`, returning an array of all elements
+ * `predicate` returns truthy for. The predicate is invoked with three
+ * arguments: (value, key, object).
+ *
+ * @since 5.0.0
+ * @category Object
+ * @param {Object} object The object to iterate over.
+ * @param {Function} predicate The function invoked per iteration.
+ * @returns {Array} Returns the new filtered array.
+ * @see pull, pullAll, pullAllBy, pullAllWith, pullAt, remove, reject
+ * @example
+ *
+ * const object = { 'a': 5, 'b': 8, 'c': 10 }
+ *
+ * filterObject(object, (n) => !(n % 5))
+ * // => [5, 10]
+ */
+function filterObject(object, predicate) {
+  const result = []
+  Object.keys(Object(object)).forEach((key) => {
+    if (predicate(object[key], key, object)) {
+      result.push(value)
+    }
+  })
+  return result
+}
+
+export default filterObject