Travis build: 145

README.md

@@ -39,6 +39,7 @@
 * [`every`](#every)
 * [`every_nth`](#every_nth)
 * [`filter_non_unique`](#filter_non_unique)
+* [`filter_unique`](#filter_unique)
 * [`flatten`](#flatten)
 * [`group_by`](#group_by)
 * [`has_duplicates`](#has_duplicates)
@@ -478,6 +479,27 @@ filter_non_unique([1, 2, 2, 3, 4, 4, 5]) # [1, 3, 5]
 
 <br>[⬆ Back to top](#contents)
 
+### filter_unique
+
+Filters out the unique values in a list.
+
+Use list comprehension and `list.count()` to create a list containing only the non-unique values.
+
+```py
+def filter_unique(lst):
+  return [x for x in set(item for item in lst if lst.count(item) > 1)]
+```
+
+<details>
+<summary>Examples</summary>
+
+```py
+filter_unique([1, 2, 2, 3, 4, 4, 5]) # [2, 4]
+```
+</details>
+
+<br>[⬆ Back to top](#contents)
+
 ### flatten
 
 Flattens a list of lists once.

snippet_data/snippetList.json

@@ -402,6 +402,21 @@
         "hash": "05679ae115d276830ec769a04b0800d92eabc6a09678fc1a9cf6013c813cc650"
       }
     },
+    {
+      "id": "filter_unique",
+      "type": "snippetListing",
+      "title": "filter_unique",
+      "attributes": {
+        "text": "Filters out the unique values in a list.\n\nUse list comprehension and `list.count()` to create a list containing only the non-unique values.\n\n",
+        "tags": [
+          "list",
+          "beginner"
+        ]
+      },
+      "meta": {
+        "hash": "174c62134c81e139aa9d0b31f46c684b5edd4c52e721136d586d435058e19288"
+      }
+    },
     {
       "id": "flatten",
       "type": "snippetListing",

snippet_data/snippets.json

@@ -532,6 +532,26 @@
         "hash": "05679ae115d276830ec769a04b0800d92eabc6a09678fc1a9cf6013c813cc650"
       }
     },
+    {
+      "id": "filter_unique",
+      "title": "filter_unique",
+      "type": "snippet",
+      "attributes": {
+        "fileName": "filter_unique.md",
+        "text": "Filters out the unique values in a list.\n\nUse list comprehension and `list.count()` to create a list containing only the non-unique values.\n\n",
+        "codeBlocks": {
+          "code": "def filter_unique(lst):\n  return [x for x in set(item for item in lst if lst.count(item) > 1)]",
+          "example": "filter_unique([1, 2, 2, 3, 4, 4, 5]) # [2, 4]"
+        },
+        "tags": [
+          "list",
+          "beginner"
+        ]
+      },
+      "meta": {
+        "hash": "174c62134c81e139aa9d0b31f46c684b5edd4c52e721136d586d435058e19288"
+      }
+    },
     {
       "id": "flatten",
       "title": "flatten",